IAM-20680HP

MEMS Module, Accelerometer, Gyroscope, X, Y, Z, 1.71 V, 3.6 V, LGA, 16 Pins

⚠️ Reference pricing provided. In case of supply shortages, we will connect you with our trusted procurement partners to ensure your project's continuity.
Manufacturer: TDK INVENSENSE
Product type: MEMS Modules
MSL: MSL 3 - 168 hours
SVHC: No SVHC (25-Jun-2025)
No. of Pins: 16Pins
Sensor Type: Accelerometer, Gyroscope
Sensing Axis: X, Y, Z
Product Range: -
Output Interface: I2C, SPI
Sensor Case Style: LGA
Supply Voltage Max: 3.6V
Supply Voltage Min: 1.71V
MEMS Module Function: Tri-Axis Gyroscope, Tri-Axis Accelerometer
Sensor Case / Package: LGA
Operating Temperature Max: 105°C
Operating Temperature Min: -40°C
Sensing Range - Gyroscope: ± 250°/s, ± 500°/s, ± 1000°/s, ± 2000°/s
Temperature Sensing Range: -
Sensing Range - Accelerometer: ± 2g, ± 4g, ± 8g, ± 16g
Delivery and price
Units per pack	100
Price	8.51 €
Current stock	1000+
Lead time	30 days
Datasheet
## _**IAM-20680HP**_ 

## High Performance Automotive 6-Axis MotionTracking Device 

## **GENERAL DESCRIPTION** 

The IAM-20680HP is a 6-axis MotionTracking device for Automotive non-safety applications that combines a 3- axis gyroscope and a 3-axis accelerometer in a small 3x3x0.75mm[3] (16-pin LGA) package. It also features a 4096-byte FIFO that can lower the traffic on the serial bus interface and reduce power consumption by allowing the system processor to burst read sensor data and then go into a low-power mode. IAM-20680HP, with its 6-axis integration, enables manufacturers to eliminate the costly and complex selection, qualification, and system level integration of discrete devices, guaranteeing optimal motion performance. 

The gyroscope has a programmable full-scale range of ±250 dps, ±500 dps, ±1000 dps and ±2000 dps. The accelerometer has a user-programmable accelerometer full-scale range of ±2 _g_ , ±4 _g_ , ±8 _g_ , and ±16 _g_ . Factorycalibrated initial sensitivity of both sensors reduces production-line calibration requirements. 

Other industry-leading features include on-chip 16-bit ADCs, programmable digital filters, an embedded temperature sensor, and programmable interrupts. The device features I[2] C and SPI serial interfaces, a VDD operating range of 1.71V to 3.6V, and a separate digital IO supply, VDDIO from 1.71V to 3.6V. 

## **BLOCK DIAGRAM** 

## **APPLICATIONS** 

IAM-20680HP addresses a wide range of Automotive applications, including but not limited to: 

- Navigation Systems Aids for Dead Reckoning 

- Lift Gate Motion Detection 

- Accurate Location for Vehicle to Vehicle and Infrastructure 

- Camera Stabilization and Vision Systems 

- Head-up display (HUD) and augmented reality HUD 

- Telematics and Car Alarm 

- Insurance Vehicle Tracking 

## **ORDERING INFORMATION** 

**PART AXES TEMP RANGE PACKAGE MSL*** IAM-20680HP[†] X,Y,Z -40°C to +105°C 16-Pin LGA 3 ~~EYEE~~ 

†Denotes RoHS and Green-compliant package 

* Moisture sensitivity level of the package 

## **FEATURES** 

- Digital-output X-, Y-, and Z-axis angular rate sensors with a user-programmable full-scale range of ±250dps, ±500dps, ±1000dps, and ±2000dps. 

- Digital-output X-, Y-, and Z-axis accelerometer with a user-programmable full-scale range of ±2 _g_ , ±4 _g_ , ±8 _g,_ and ±16 _g_ 

- Integrated 16-bit ADCs 

- User-programmable digital filters for gyroscope, accelerometer, and temperature sensor 

- Embedded Self-test 

**==> picture [233 x 178] intentionally omitted <==**

**----- Start of picture text -----**<br>
IAM-20680HP<br>INT<br>Self test X Accel ADC Interrupt<br>Status<br>Register<br>NCS<br>2027 Self test Y Accel ADC mH FIFO Slave I2C and SPI Serial Interface | SDOSCLK<br>Self test Z Accel ADC User & Config  SDI<br>Registers<br>FSYNC<br>eosos) Self test X Gyro AD C RegistersSensor  ==<br>Self test Y Gyro ADC<br>= lS p e!|<br>Self test Z Gyro AD C<br>Temp Sensor ADC<br>[ FL<br>Charge  Bias & LDOs<br>Pump<br>= ——-<br>VDD GND REGOUT<br>Signal Conditioning<br>**----- End of picture text -----**<br>


- Wake-on-motion interrupt for low power operation of applications processor 

- Reliability testing performed according to AEC–Q100: PPAP and qualification data available upon request 

- Final test at -40°C, 25°C, and 105°C 

## **TYPICAL OPERATING CIRCUIT** 

**==> picture [258 x 139] intentionally omitted <==**

**----- Start of picture text -----**<br>
1.8 – 3.3VDC<br>VDD<br>C2, 0.1 mF C4, 2.2 mF REGOUT<br>16 15 14<br>1.8 – 3.3 VDC VDDIO 1 13 GND a C1, 0.47 mF<br>C3, 10 nF SCL SCL/SPC 2 12 RESV<br>I SDA SDA/SDI 3 IAM-20680HP 11 RESV<br>AD0 SA0/SDO 4 10 RESV<br>VDDIO CS 5 9 RESV<br>6 7 8<br>RESV<br>INT RESV FSYNC<br>**----- End of picture text -----**<br>


**InvenSense, Inc.** 1745 Technology Drive, San Jose, CA 95110 U.S.A +1(408) 988–7339 

This document contains information on a preproduction product, and should not be considered for production until qualification is complete. InvenSense Inc. reserves the right to change specifications and information herein without notice. 

Document Number: DS-000409 Revision: 1.0 Rev. Date: 10/05/2020 

www.invensense.com 

_**IAM-20680HP**_ 

## _**TABLE OF CONTENTS**_ 

||General Description ............................................................................................................................................. 1|General Description ............................................................................................................................................. 1|
|---|---|---|
||Block Diagram ...................................................................................................................................................... 1|Block Diagram ...................................................................................................................................................... 1|
||Applications ......................................................................................................................................................... 1||
||Ordering Information ........................................................................................................................................... 1||
||Features ............................................................................................................................................................... 1||
||Typical Operating Circuit ...................................................................................................................................... 1||
|TABLE OF CONTENTS....................................................................................................................................................... 2|TABLE OF CONTENTS....................................................................................................................................................... 2||
|LIST OF FIGURES .............................................................................................................................................................. 5|||
|LIST OF TABLES ................................................................................................................................................................ 6|||
|1|Introduction ......................................................................................................................................................... 7||
||1.1|Purpose and Scope .................................................................................................................................... 7|
||1.2|Product Overview...................................................................................................................................... 7|
||1.3|Applications ............................................................................................................................................... 7|
|2|Features ............................................................................................................................................................... 8||
||2.1|Gyroscope Features .................................................................................................................................. 8|
||2.2|Accelerometer Features ............................................................................................................................ 8|
||2.3|Additional Features ................................................................................................................................... 8|
|3|Electrical Characteristics ...................................................................................................................................... 9||
||3.1|Gyroscope Specifications .......................................................................................................................... 9|
||3.2|Accelerometer Specifications .................................................................................................................. 10|
||3.3|Electrical Specifications ........................................................................................................................... 11|
||3.4|I2C Timing Characterization ..................................................................................................................... 14|
||3.5|SPI Timing Characterization .................................................................................................................... 15|
||3.6|Absolute Maximum Ratings .................................................................................................................... 16|
||3.7|Thermal Information ............................................................................................................................... 16|
|4|Applications Information ................................................................................................................................... 17||
||4.1|Pin Out Diagram and Signal Description ................................................................................................. 17|
||4.2|Typical Operating Circuit ......................................................................................................................... 18|
||4.3|Bill of Materials for External Components .............................................................................................. 18|
||4.4|Block Diagram ......................................................................................................................................... 19|
||45|Overview ................................................................................................................................................. 19|
||4.6|Three-Axis MEMS Gyroscope with 16-bit ADCs and Signal Conditioning ............................................... 20|
||4.7|Three-Axis MEMS Accelerometer with 16-bit ADCs and Signal Conditioning ......................................... 20|
||4.8|I2C and SPI Serial Communications Interfaces ........................................................................................ 20|
||4.9|Self-Test................................................................................................................................................... 21|
||4.10|Clocking ............................................................................................................................................... 21|
||4.11|Sensor Data Registers ......................................................................................................................... 21|
||4.12|FIFO ..................................................................................................................................................... 22|
||4.13|Interrupts ............................................................................................................................................ 22|



Page 2 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

|ad{TDK|ad{TDK|<br>**_IAM-20680HP_**<br>{TDK InvenSense|
|---|---|---|
||4.14|Digital-Output Temperature Sensor ................................................................................................... 22|
||4.15|Bias and LDOs ..................................................................................................................................... 22|
||4.16|Charge Pump ...................................................................................................................................... 22|
||4.17|Standard Power Modes ...................................................................................................................... 22|
||4.18|Sensor Initialization and Basic Configuration ..................................................................................... 22|
|5|Programmable Interrupts .................................................................................................................................. 24||
||5.1|Wake-on-Motion Interrupt ..................................................................................................................... 24|
|6|Digital Interface ................................................................................................................................................. 25||
||6.1|I2C and SPI Serial Interfaces .................................................................................................................... 25|
||6.2|I2C Interface ............................................................................................................................................. 25|
||6.3|IC Communications Protocol ................................................................................................................... 25|
||6.4|I2C Terms ................................................................................................................................................. 27|
||6.5|SPI Interface ............................................................................................................................................ 28|
|7|Serial Interface Considerations .......................................................................................................................... 29||
||7.1|IAM-20680HP Supported Interfaces ....................................................................................................... 29|
|8|Register Map ...................................................................................................................................................... 30||
|9|Register Descriptions ......................................................................................................................................... 32||
||9.1|Registers 0 to 2 – Gyroscope Self-Test Registers .................................................................................... 32|
||9.2|Registers 13 to 15 – Accelerometer Self-Test Registers .......................................................................... 32|
||9.3|Register 19 – Gyro Offset Adjustment Register ...................................................................................... 32|
||9.4|Register 20 – Gyro Offset Adjustment Register ...................................................................................... 33|
||9.5|Register 21 – Gyro Offset Adjustment Register ...................................................................................... 33|
||9.6|Register 22 – Gyro Offset Adjustment Register ...................................................................................... 33|
||9.7|Register 23 – Gyro Offset Adjustment Register ...................................................................................... 34|
||9.8|Register 24 – Gyro Offset Adjustment Register ...................................................................................... 34|
||9.9|Register 25 – Sample Rate Divider .......................................................................................................... 34|
||9.10|Register 26 – Configuration ................................................................................................................ 34|
||9.11|Register 27 – Gyroscope Configuration .............................................................................................. 35|
||9.12|Register 28 – Accelerometer Configuration ....................................................................................... 35|
||9.13|Register 29 – Accelerometer Configuration 2..................................................................................... 36|
||9.14|Register 30 – Low Power Mode Configuration ................................................................................... 37|
||9.15|Register 31 – Wake-on Motion Threshold (Accelerometer) ............................................................... 38|
||9.16|Register 35 – FIFO Enable ................................................................................................................... 39|
||9.17|Register 54 – FSYNC Interrupt Status.................................................................................................. 39|
||9.18|Register 55 – INT Pin / Bypass Enable Configuration .......................................................................... 39|
||9.19|Register 56 – Interrupt Enable ............................................................................................................ 40|
||9.20|Register 58 – Interrupt Status ............................................................................................................. 40|
||9.21|Registers 59 to 64 – Accelerometer Measurements .......................................................................... 40|
||9.22|Registers 65 and 66 – Temperature Measurement ............................................................................ 41|
||9.23|Registers 67 to 72 – Gyroscope Measurements ................................................................................. 41|



Page 3 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

|»4TDK|»4TDK|<br>**_IAM-20680HP_**<br>TDK InvenSense|
|---|---|---|
||9.24|Register 104 – Signal Path Reset ......................................................................................................... 42|
||9.25|Register 105 – Accelerometer Intelligence Control ............................................................................ 42|
||9.26|Register 106 – User Control ................................................................................................................ 43|
||9.27|Register 107 – Power Management 1 ................................................................................................ 43|
||9.28|Register 108 – Power Management 2 ................................................................................................ 44|
||9.29|Registers 114 and 115 – FIFO Count Registers ................................................................................... 44|
||9.30|Register 116 – FIFO Read Write .......................................................................................................... 45|
||9.31|Register 117 – Who Am I .................................................................................................................... 45|
||9.32|Registers 119, 120, 122, 123, 125, 126 Accelerometer Offset Registers ............................................ 45|
|10|Assembly ............................................................................................................................................................ 47||
||10.1|Orientation of Axes ............................................................................................................................. 47|
||10.2|Package Dimensions ........................................................................................................................... 48|
|11|Part Number Package Marking .......................................................................................................................... 50||
|12|Reference ........................................................................................................................................................... 51||
|13|Revision History ................................................................................................................................................. 52||



Page 4 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

## _**LIST OF FIGURES**_ 

|**_LIST OF FIGURES_**|**_LIST OF FIGURES_**|
|---|---|
|Figure 1. I|Figure 1. I2C Bus Timing Diagram ............................................................................................................................................................. 14|
|Figure 2. SPI Bus Timing Diagram ............................................................................................................................................................. 15|Figure 2. SPI Bus Timing Diagram ............................................................................................................................................................. 15|
|Figure 3. Pin out Diagram for IAM-20680HP 3.0x3.0x0.75 mm|Figure 3. Pin out Diagram for IAM-20680HP 3.0x3.0x0.75 mm3LGA ...................................................................................................... 17|
|Figure 4. IAM-20680HP LGA Application Schematic ................................................................................................................................ 18|Figure 4. IAM-20680HP LGA Application Schematic ................................................................................................................................ 18|
|Figure 5. IAM-20680HP Block Diagram .................................................................................................................................................... 19|Figure 5. IAM-20680HP Block Diagram .................................................................................................................................................... 19|
|Figure 6. IAM-20680HP Solution Using I|Figure 6. IAM-20680HP Solution Using I2C Interface ............................................................................................................................... 20|
|Figure 7. IAM-20680HP Solution Using SPI Interface ............................................................................................................................... 21|Figure 7. IAM-20680HP Solution Using SPI Interface ............................................................................................................................... 21|
|Figure 8. START and STOP Conditions ...................................................................................................................................................... 25|Figure 8. START and STOP Conditions ...................................................................................................................................................... 25|
|Figure 9. Acknowledge on the I|Figure 9. Acknowledge on the I2C Bus ..................................................................................................................................................... 26|
|Figure 10. Complete I|Figure 10. Complete I2C Data Transfer ..................................................................................................................................................... 26|
|Figure 11. Typical SPI Master/Slave Configuration .................................................................................................................................. 28|Figure 11. Typical SPI Master/Slave Configuration .................................................................................................................................. 28|
|Figure 12. I/O Levels and Connections ..................................................................................................................................................... 29|Figure 12. I/O Levels and Connections ..................................................................................................................................................... 29|
|Figure 13. Orientation of Axes of Sensitivity and Polarity of Rotation .................................................................................................... 47|Figure 13. Orientation of Axes of Sensitivity and Polarity of Rotation .................................................................................................... 47|
|Figure 14. Package Dimensions................................................................................................................................................................ 48|Figure 14. Package Dimensions................................................................................................................................................................ 48|
|Figure 15. Part Number Package Marking ............................................................................................................................................... 50|Figure 15. Part Number Package Marking ............................................................................................................................................... 50|



Page 5 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

## **LIST OF TABLES** 

|Table 1. Gyroscope Specifications ............................................................................................................................................................. 9|Table 1. Gyroscope Specifications ............................................................................................................................................................. 9|
|---|---|
|Table 2. Accelerometer Specifications ..................................................................................................................................................... 10|Table 2. Accelerometer Specifications ..................................................................................................................................................... 10|
|Table 3. D.C. Electrical Characteristics ..................................................................................................................................................... 11|Table 3. D.C. Electrical Characteristics ..................................................................................................................................................... 11|
|Table 4. A.C. Electrical Characteristics ..................................................................................................................................................... 13|Table 4. A.C. Electrical Characteristics ..................................................................................................................................................... 13|
|Table 5. Other Electrical Specifications .................................................................................................................................................... 13|Table 5. Other Electrical Specifications .................................................................................................................................................... 13|
|Table 6. I|Table 6. I2C Timing Characteristics ........................................................................................................................................................... 14|
|Table 7. SPI Timing Characteristics (8 MHz Operation) ........................................................................................................................... 15|Table 7. SPI Timing Characteristics (8 MHz Operation) ........................................................................................................................... 15|
|Table 8. Absolute Maximum Ratings ....................................................................................................................................................... 16|Table 8. Absolute Maximum Ratings ....................................................................................................................................................... 16|
|Table 9. Thermal Information .................................................................................................................................................................. 16|Table 9. Thermal Information .................................................................................................................................................................. 16|
|Table 10. Signal Descriptions ................................................................................................................................................................... 17|Table 10. Signal Descriptions ................................................................................................................................................................... 17|
|Table 11. Bill of Materials ........................................................................................................................................................................ 18|Table 11. Bill of Materials ........................................................................................................................................................................ 18|
|Table 12. Standard Power Modes for IAM-20680HP ............................................................................................................................... 22|Table 12. Standard Power Modes for IAM-20680HP ............................................................................................................................... 22|
|Table 13. Table of Interrupt Sources ........................................................................................................................................................ 24|Table 13. Table of Interrupt Sources ........................................................................................................................................................ 24|
|Table 14. Serial Interface ......................................................................................................................................................................... 25|Table 14. Serial Interface ......................................................................................................................................................................... 25|
|Table 15. I|Table 15. I2C Terms .................................................................................................................................................................................. 27|
|Table 16. Register Map ............................................................................................................................................................................ 31|Table 16. Register Map ............................................................................................................................................................................ 31|
|Table 17. Configuration............................................................................................................................................................................ 35|Table 17. Configuration............................................................................................................................................................................ 35|
|Table 18. Accelerometer Data Rates and Bandwidths (Low Noise Mode) .............................................................................................. 36|Table 18. Accelerometer Data Rates and Bandwidths (Low Noise Mode) .............................................................................................. 36|
|Table 19. Accelerometer Filter Bandwidths, Noise, and Current Consumption (Low-Power Mode) ...................................................... 37|Table 19. Accelerometer Filter Bandwidths, Noise, and Current Consumption (Low-Power Mode) ...................................................... 37|
|Table 20. Example Configurations for Gyroscope Low-Power Mode ...................................................................................................... 38|Table 20. Example Configurations for Gyroscope Low-Power Mode ...................................................................................................... 38|
|Table 21. Package Dimensions ................................................................................................................................................................. 49|Table 21. Package Dimensions ................................................................................................................................................................. 49|
|Table 22. Part Number Package Marking ................................................................................................................................................ 50|Table 22. Part Number Package Marking ................................................................................................................................................ 50|



Page 6 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

## _**1 INTRODUCTION**_ 

## **PURPOSE AND SCOPE** 

This document is a product specification, providing description, specifications, and design related information on the IAM-20680HP Automotive MotionTracking device. The device is housed in a small 3x3x0.75 mm[3] 16-pin LGA package. 

## **PRODUCT OVERVIEW** 

The IAM-20680HP is a 6-axis MotionTracking device for Automotive non-safety applications, that combines a 3-axis gyroscope and a 3-axis accelerometer in a small 3x3x0.75 mm (16-pin LGA) package. It also features a 4096-byte FIFO that can lower the traffic on the serial bus interface and reduce power consumption by allowing the system processor to burst read sensor data and then go into a low-power mode. IAM-20680HP, with its 6-axis integration, enables manufacturers to eliminate the costly and complex selection, qualification, and system level integration of discrete devices, guaranteeing optimal motion performance. 

The gyroscope has a programmable full-scale range of ±250 dps, ±500 dps, ±1000 dps, and ±2000 dps. The accelerometer has a userprogrammable accelerometer full-scale range of ±2 _g_ , ±4 _g_ , ±8 _g_ , and ±16 _g_ . Factory-calibrated initial sensitivity of both sensors reduces production-line calibration requirements. 

Other industry-leading features include on-chip 16-bit ADCs, programmable digital filters, an embedded temperature sensor, and programmable interrupts. The device features I[2] C and SPI serial interfaces, a VDD operating range of 1.71V to 3.6V, and a separate digital IO supply, VDDIO from 1.71V to 3.6V. 

Communication with all registers of the device is performed using either I[2] C at 400 kHz or SPI at 8 MHz. 

By leveraging its patented and volume-proven CMOS-MEMS fabrication platform, which integrates MEMS wafers with companion CMOS electronics through wafer-level bonding, TDK-InvenSense has driven the package size down to a footprint and thickness of 3x3x0.75 mm (16-pin LGA), to provide a very small yet high-performance, low-cost package. The device provides high robustness by supporting 10,000 _g_ shock reliability. 

## **APPLICATIONS** 

- Navigation Systems Aids for Dead Reckoning 

- Lift Gate Motion Detections 

- Accurate Location for Vehicle to Vehicle and Infrastructure 

- View Camera Stabilization and Vision Systems 

- Head-up display (HUD) and augmented reality HUD 

- Car Alarm 

- Telematics 

- Insurance Vehicle Tracking 

Page 7 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

## _**2 FEATURES**_ 

## **GYROSCOPE FEATURES** 

The triple-axis MEMS gyroscope in the IAM-20680HP includes a wide range of features: 

- Digital-output X-, Y-, and Z-axis angular rate sensors (gyroscopes) with a user-programmable full-scale range of ±250 dps, ±500 dps, ±1000 dps and ±2000 dps and integrated 16-bit ADCs 

- Digitally-programmable low-pass filter 

- Factory calibrated sensitivity scale factor 

- Self-test 

## **ACCELEROMETER FEATURES** 

The triple-axis MEMS accelerometer in IAM-20680HP includes a wide range of features: 

- Digital-output X-, Y-, and Z-axis accelerometer with a programmable full-scale range of ±2 _g_ , ±4 _g_ , ±8 _g_ and ±16 _g_ and integrated 16-bit ADCs 

- User-programmable interrupts 

- Wake-on-motion interrupt for low power operation of applications processor 

- Self-test 

## **ADDITIONAL FEATURES** 

The IAM-20680HP includes the following additional features: 

- Smallest and thinnest LGA package for portable devices: 3x3x0.75 mm (16-pin LGA) 

- Minimal cross-axis sensitivity between the accelerometer and gyroscope axes 

- 4096-byte FIFO buffer enables the applications processor to read the data in bursts 

- Digital-output temperature sensor 

- User-programmable digital filters for gyroscope, accelerometer, and temperature sensor 

- 10,000 _g_ shock tolerant 

- 400 kHz Fast Mode I[2] C for communicating with all registers 

- 8 MHz SPI serial interface for communicating with all registers 

- MEMS structure hermetically sealed and bonded at wafer level 

- RoHS and Green compliant 

Page 8 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

## _**3 ELECTRICAL CHARACTERISTICS**_ 

## **GYROSCOPE SPECIFICATIONS** 

Typical Operating Circuit of section 4.2, VDD = 1.8V, VDDIO = 1.8V, TA = 25°C, Full Scale = 2000dps, Low Noise Mode enabled unless otherwise noted. 

All Zero-rate output, sensitivity, and noise specifications include board soldering effects, unless otherwise noted. 

|**PARAMETER**<br>~~a~~|**CONDITIONS**|**MIN**|**TYP**|**MAX**|**UNITS**|**NOTES**|
|---|---|---|---|---|---|---|
|**GYROSCOPE SENSITIVITY**<br>~~Cn~~|||||||
|Full-Scale Range<br>~~GG~~|FS_SEL=0<br>~~GG~~|~~GG~~|±250<br>~~GG~~|~~GG~~|dps<br>~~GG~~|3<br>~~GG~~|
|~~GG~~|FS_SEL=1<br>~~GG~~|~~GG~~|±500<br>~~GG~~|~~GG~~|dps<br>~~GG~~|3<br>~~GG~~|
|~~GG~~<br>~~a~~|FS_SEL=2<br>~~GG~~|~~GG~~|±1000<br>~~GG~~<br>~~QO~~|~~GG~~<br>~~QO~~|dps<br>~~GG~~|3<br>~~GG~~|
|~~GQ~~<br>~~a~~|FS_SEL=3<br>~~GQ~~|~~GQ~~|±2000<br>~~GQ~~<br>~~QO~~|~~GQ~~<br>~~QO~~|dps<br>~~GQ~~|3<br>~~GQ~~|
|Gyroscope ADC Word Length<br>~~a~~|||16<br>~~QO~~|~~QO~~|bits|3|
|SensitivityScale Factor<br>~~a~~|FS_SEL=0||131||LSB/(dps)|3|
|~~a~~<br>~~a~~|FS_SEL=1||65.5||LSB/(dps)|3|
|~~aa~~|FS_SEL=2||32.8||LSB/(dps)|3|
|~~aa~~<br>~~a~~|FS_SEL=3||16.4||LSB/(dps)|3|
|Nonlinearity<br>~~a~~<br>~~a~~<br>~~re~~|Best fit straight line;25°C<br>~~Qs~~|~~Gr~~|±0.1<br>~~GO~~|~~GO~~|%<br>~~OO~~|1|
|Cross-Axis Sensitivity<br>~~a~~<br>~~re~~|25°C<br>~~Qs~~|~~Gr~~|±5<br>~~GO~~|~~GO~~|%<br>~~OO~~|1|
|**ZERO-RATE OUTPUT (ZRO)**<br>~~reQsGr~~<br>~~GO~~<br>~~OO~~|||||||
|ZRO Tolerance<br>~~a~~|All axes,25°C||±0.8||dps|1,2|
|ZRO Variation Over Temperature<br>~~a~~|All axes,-40°C to +105°C||±0.9||dps|1,2|
|**GYROSCOPE NOISE PERFORMANCE(FS_SEL=1)**<br>~~Ce~~<br>~~ee~~<br>~~ee~~|||||||
|Rate Noise Spectral Density<br>~~es~~|25°C, initial, Noise BW = 306 Hz<br>VDD = VDDIO = 1.8V<br>~~es~~<br>~~ee~~|~~es~~<br>~~ee~~|0.005<br>~~es~~|~~es~~|dps/√Hz<br>~~es~~|1,4<br>~~es~~|
|Gyroscope Mechanical Frequencies<br>~~es~~|~~es~~<br>~~ee~~|~~es~~<br>~~ee~~|27<br>~~es~~<br>~~QO~~|~~es~~<br>~~QO~~|KHz<br>~~es~~<br>~~QO~~|2<br>~~es~~|
|Low Pass Filter Response<br>~~GG~~|Programmable Range<br>~~GG~~|5<br>~~GG~~|~~GG~~<br>~~QO~~|250<br>~~GG~~<br>~~QO~~|Hz<br>~~GG~~<br>~~QO~~|3<br>~~GG~~|
|Gyroscope Start UpTime|From Sleepmode,25°C||35<br>~~QO~~|~~QO~~|ms<br>~~QO~~|1|
|Output Data Rate|Programmable, Normal (Filtered)<br>mode|4||8000|Hz|1|



**Table 1. Gyroscope Specifications** 

## **Notes** : 

1. Based on characterization data on a limited number of parts. 

2. Tested in production at component level at -40°C and/or 25°C, 105°C. 

3. Guaranteed by design. 

4. Calculated from Total RMS Noise. 

Page 9 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

## **ACCELEROMETER SPECIFICATIONS** 

Typical Operating Circuit of section 4.2, VDD = 1.8V, VDDIO = 1.8V, TA = 25°C, Full Scale = 8 _g_ , Low Noise Mode enabled unless otherwise noted. 

All Zero-g output, sensitivity, and noise specifications include board soldering effects, unless otherwise noted. 

|**PARAMETER**|**CONDITIONS**|**MIN**|**TYP**|**MAX**|**UNITS**|**NOTES**|
|---|---|---|---|---|---|---|
|**ACCELEROMETER SENSITIVITY**<br>~~BE~~|||||||
|Full-Scale Range<br>~~BE~~|AFS_SEL=0<br>~~BE~~||±2<br>||_g_<br>|3<br>|
||AFS_SEL=1<br>~~BE~~||±4<br>|~~ee~~|_g_<br><br>~~ee~~|3<br>|
||AFS_SEL=2<br>~~BEse~~|~~se~~|±8<br>~~se~~|~~se~~<br>~~ee~~|_g_<br>~~se~~<br>~~ee~~|3<br>~~se~~|
||AFS_SEL=3<br>~~BEse~~|~~se~~|±16<br>~~se~~|~~se~~<br>~~ee~~|_g_<br>~~se~~<br>~~ee~~|3<br>~~se~~|
|ADC Word Length<br>~~BE~~|Output in two’s complement format<br>~~BE~~||16<br>|~~ee~~|bits<br><br>~~ee~~|3<br>|
|Sensitivity Scale Factor<br>~~ES~~|AFS_SEL=0<br>~~ES~~|~~ES~~|16,384<br>~~ES~~|~~ES~~|LSB/_g_<br>~~ES~~|3<br>~~ES~~|
||AFS_SEL=1<br>~~GQ~~<br>~~ES~~|~~GQ~~<br>~~ES~~|8,192<br>~~GQ~~<br>~~ES~~|~~GQ~~<br>~~ES~~|LSB/_g_<br>~~GQ~~<br>~~ES~~|3<br>~~GQ~~<br>~~ES~~|
||AFS_SEL=2<br>~~ES~~|~~ES~~|4,096<br>~~ES~~|~~ES~~|LSB/_g_<br>~~ES~~|3<br>~~ES~~|
||AFS_SEL=3<br>~~ES~~|~~ES~~|2,048<br>~~ES~~|~~ES~~|LSB/_g_<br>~~ES~~|3<br>~~ES~~|
|Nonlinearity<br>~~ee~~|Best Fit Straight Line for 2g,25°C<br>~~ee~~|~~ee~~|±0.05<br>~~ee~~|~~ee~~|%<br>~~ee~~|1<br>~~ee~~|
|Cross-Axis Sensitivity<br>~~ee~~|25°C<br>~~ee~~|~~ee~~|±5<br>~~ee~~|~~ee~~|%<br>~~ee~~|1<br>~~ee~~|
|**ZERO-G OUTPUT**|||||||
|Zero-G Level Tolerance<br>~~a~~|All axes,25°C||±40||m_g_|1,2|
|Zero-G Level Variation Over<br>Temperature<br>~~a~~|All axes, -40°C to +105°C||±15||m_g_|1,2|
|**NOISE PERFORMANCE**<br>~~ee~~<br>~~ee~~|||||||
|Power Spectral Density<br>~~ee~~|Low noise mode, +25°C, initial,<br>Noise BW = 235 Hz,VDD = VDDIO = 1.8V<br>~~ee~~<br>~~ee~~|~~ee~~<br>~~ee~~|135<br>~~ee~~<br>~~ee~~|~~ee~~|µ_g_/√Hz<br>~~ee~~|1,4<br>~~ee~~|
|Low Pass Filter Response<br>~~QQ~~|Programmable Range<br>~~ee~~<br>~~QQ~~|5<br>~~ee~~<br>~~QQ~~|~~ee~~<br>~~QQ~~|218<br>~~QQ~~|Hz<br>~~QQ~~<br>~~—~~|3<br>~~QQ~~<br>~~—~~|
|Accelerometer Startup Time|From Sleepmode,25°C||4||ms<br>~~—~~|1<br>~~—~~|
||From Cold Start,1 ms VDDramp||6||ms<br>~~—~~|1<br>~~—~~|
|Output Data Rate<br>~~GQ~~|Low noise(active)<br>~~GQ~~|4<br>~~GQ~~|~~GQ~~|4000<br>~~GQ~~|Hz<br>~~—~~<br>~~GQ~~|1<br>~~—~~<br>~~GQ~~|



**Table 2. Accelerometer Specifications** 

**Notes** : 

1. Based on characterization data on a limited number of parts. 

2. Tested in production at component level at -40°C and/or 25°C, 105°C. 

3. Guaranteed by design. 

4. Calculated from Total RMS Noise. 

Page 10 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

## **ELECTRICAL SPECIFICATIONS** 

## **D.C. Electrical Characteristics** 

|**PARAMETER**<br>|**CONDITIONS**<br>|**MIN**<br>|**TYP**<br>|**MAX**<br>|**UNITS**<br>|**NOTES**<br>|
|---|---|---|---|---|---|---|
|**SUPPLY VOLTAGES**<br>~~pT~~|||||||
|VDD<br>~~po~~|~~po~~|1.71<br>~~po~~|1.8<br>~~po~~|3.6<br>~~po~~|V<br>~~po~~|1<br>~~po~~|
|VDDIO<br>~~a ~~|~~GC~~|1.71<br>~~GC~~|1.8<br>~~GC~~|3.6<br>~~GC~~|V<br>~~GC~~|1<br>~~GC~~|
|**SUPPLY CURRENTS & BOOT TIME**<br>~~PT~~<br>~~pT~~<br>~~po~~|||||||
|Normal Mode<br>~~po~~|6-axis Gyroscope + Accelerometer<br>~~pT~~|~~pT~~|3<br>~~pT~~|~~pT~~|mA<br>~~pT~~|1<br>~~pT~~|
||3-axis Gyroscope<br>~~pT~~|~~pT~~|2.6<br>~~pT~~|~~pT~~|mA<br>~~pT~~|1<br>~~pT~~|
||3-axis Accelerometer,4 kHz ODR<br>~~pT~~<br>~~ee~~|~~pT~~<br>~~ee~~|390<br>~~pT~~<br>~~ee~~|~~pT~~<br>~~ee~~|µA<br>~~pT~~<br>~~ee~~|1<br>~~pT~~<br>~~ee~~|
|Full-ChipSleepMode<br>~~po~~<br>~~a~~|~~pT~~<br>~~ODO~~|~~pT~~<br>~~ODO~~|6<br>~~pT~~<br>~~ODO~~|~~pT~~<br>~~ODO~~|µA<br>~~pT~~<br>~~ODO~~|1<br>~~pT~~<br>~~ODO~~|
|**TEMPERATURE RANGE**<br>~~pT~~<br>~~po~~<br>~~pT~~|||||||
|Specified Temperature Range|Performance parameters are not applicable<br>beyond Specified Temperature Range|-40||+105|°C|1, 2|



## **Table 3. D.C. Electrical Characteristics** 

**Notes** : 

1. Based on characterization data on a limited number of parts. 

2. Based on qualification. 

Page 11 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

## **A.C. Electrical Characteristics** 

Typical Operating Circuit of section 4.2, VDD = 1.8V, VDDIO = 1.8V, TA = 25°C, unless otherwise noted. 

|**PARAMETER**<br>~~||~~|**CONDITIONS**<br>~~||~~|**MIN**<br>~~||~~|**TYP**<br>~~||~~|**MAX**<br>~~||~~|**UNITS**<br>~~||~~|**NOTES**<br>~~||~~|
|---|---|---|---|---|---|---|
|**SUPPLIES**<br>~~|~~|||||||
|Supply Ramp Time (TRAMP)|Monotonic ramp. Ramp<br>rate is 10% to 90% of the<br>final value|0.01||100|ms|1|
|**TEMPERATURE SENSOR**<br>~~a~~|||||||
|OperatingRange<br>~~a~~<br>~~es~~|Ambient<br>~~a~~<br>~~GQ~~|-40<br>~~a~~<br>~~GQ~~|~~a~~|105<br>~~a~~|°C<br>~~a~~|1|
|Room Temperature Offset<br>~~es~~|25°C<br>~~GQ~~|~~GQ~~|0||°C|1|
|Sensitivity<br>~~es~~|Untrimmed<br>~~GQ~~|~~GQ~~|326.8||LSB/°C|1|
|**POWER-ON RESET**<br>||||||||
|SupplyRampTime(TRAMP)<br>~~Rn~~|Validpower-on RESET<br>~~Rn~~|0.01<br>~~Rn~~|~~Rn~~<br>~~eee~~|100<br>~~Rn~~<br>~~eee~~|ms<br>~~Rn~~<br>~~eee~~|1<br>~~Rn~~|
|Start-up time for register read/write<br>~~eee~~|Frompower-up<br>~~eee~~|~~eee~~|11<br>~~eee~~<br>~~eee~~|100<br>~~eee~~<br>~~eee~~<br>~~(~~|ms<br>~~eee~~<br>~~eee~~|1<br>~~eee~~|
||From sleep<br>~~eee~~<br>~~Rn~~|~~eee~~<br>~~Rn~~|~~eee~~<br>~~eee~~<br>~~Rn~~|5<br>~~eee~~<br>~~eee~~<br>~~Rn~~<br>~~(~~|ms<br>~~eee~~<br>~~eee~~<br>~~Rn~~|1<br>~~eee~~<br>~~Rn~~|
|**I2C ADDRESS**|SA0 = 0<br>SA0 = 1||1101000<br>1101001<br>~~eee~~|~~eee~~<br>~~(~~|~~eee~~||
|**DIGITAL INPUTS(FSYNC, SA0, SPC, SDI, CS)**<br>~~|~~<br>~~es~~<br>~~i~~|||||||
|VIH,High Level Input Voltage<br>~~—~~|~~—~~<br>~~es~~|0.7*VDDIO<br>~~—~~|~~—~~|~~—~~<br>~~i~~|V<br>~~—~~<br>~~i~~|1<br>~~—~~<br>~~i~~|
|VIL,Low Level Input Voltage<br>~~—~~<br>~~rs~~<br>~~NNN At~~|~~—~~<br>~~es~~<br>~~rs~~<br>~~At~~|~~—~~<br>~~rs~~<br>~~At~~|~~—~~<br>~~rs~~<br>~~_____~~|0.3*VDDIO<br>~~—~~<br>~~i~~<br>~~rs~~<br>~~_____~~|V<br>~~—~~<br>~~i~~<br>~~rs~~<br>~~_____~~||
|CI,Input Capacitance<br>~~—~~<br>~~NNN At~~|~~—~~<br>~~es~~<br>~~At~~|~~—~~<br>~~At~~|< 10<br>~~—~~<br>~~_____~~|~~—~~<br>~~i~~<br>~~_____~~|pF<br>~~—~~<br>~~i~~<br>~~_____~~||
|**DIGITAL OUTPUT(SDO, INT)**<br>~~es~~<br>~~i~~<br>~~NNN At_____~~<br>~~QQ~~<br>~~rsDQ~~<br>~~——~~|||||||
|VOH,High Level Output Voltage<br>~~NNN At~~<br>~~GQ~~<br>~~rs~~<br>~~——~~|RLOAD=1 MΩ;<br>~~At~~<br>~~GQ~~<br>~~DQ~~|0.9*VDDIO<br>~~At ~~<br>~~GQ~~<br>~~DQ~~|~~_____~~<br>~~GQ~~<br>~~QQ~~<br>~~DQ~~|~~_____~~<br>~~GQ~~<br>~~QQ~~|V<br>~~_____~~<br>~~GQ~~|1|
|VOL1,LOW-Level Output Voltage<br>~~rs~~<br>~~——~~|RLOAD=1 MΩ;<br>~~DQ~~|~~DQ~~|~~QQ~~<br>~~DQ~~|0.1*VDDIO<br>~~QQ~~|V||
|VOL.INT, INT Low-Level Output Voltage<br>~~rs ~~<br>~~——~~<br>~~>]~~|OPEN=1, 0.3 mA sink<br>Current<br> ~~DQ~~|~~DQ~~|~~QQ~~<br>~~DQ~~<br>~~QQ~~|0.1<br>~~QQ~~<br>~~QQ~~|V||
|Output Leakage Current<br> <br>~~——~~<br>~~GQ~~<br>~~>]~~<br>~~NNN At~~|OPEN=1<br> ~~DQ~~<br>~~GQ~~<br>~~At~~|~~DQ~~<br>~~GQ~~<br>~~At~~|100<br>~~DQ~~<br>~~GQ~~<br>~~QQ~~<br>~~__~~|~~GQ~~<br>~~QQ~~<br>~~__~~|nA<br>~~GQ~~<br>~~__~~||
|tINT,INT Pulse Width<br> <br>~~——~~<br>~~>]~~<br>~~NNN At~~|LATCH_INT_EN=0<br> ~~DQ~~<br>~~At~~|~~DQ~~<br>~~At~~|50<br>~~DQ~~<br>~~QQ~~<br>~~__~~|~~QQ~~<br>~~__~~|µs<br>~~__~~||
|**I2C I/O (SCL, SDA)**<br> ~~DQ~~<br>~~——~~<br>~~QQ~~<br>~~>]~~<br>~~NNN At__~~<br>~~__~~<br>~~QQ~~|||||||
|VIL,LOW Level Input Voltage<br>~~>]~~<br>~~NNN At~~<br>~~GQ~~<br>~~es~~|~~At~~<br>~~GQ~~<br>~~ee~~<br>|-0.5V<br>~~At ~~<br>~~GQ~~<br>~~ee~~<br>|~~QQ~~<br> ~~__~~<br>~~GQ~~<br>~~QQ~~<br>~~es~~<br>|0.3*VDDIO<br>~~QQ~~<br>~~__~~<br>~~GQ~~<br>~~QQ~~<br>~~ee~~|V<br>~~__~~<br>~~GQ~~<br>~~ee~~|1<br>~~ee~~<br>~~ee~~|
|VIH, HIGH-Level Input Voltage<br>~~ee~~<br>~~es~~|~~ee~~<br>~~ee~~<br>|0.7*VDDIO<br>~~ee~~<br>~~ee~~<br>|~~QQ~~<br>~~ee~~<br>~~es~~<br>|VDDIO + 0.5<br>V<br>~~QQ~~<br>~~ee~~<br>~~ee~~|V<br>~~ee~~<br>~~ee~~||
|Vhys,Hysteresis<br>~~es~~|~~ee~~<br>~~GQ~~|~~ee~~<br>~~GQ~~|0.1*VDDIO<br>~~es~~<br>~~GQ~~<br>~~QQ~~|~~ee~~<br>~~QQ~~|V<br>~~ee~~||
|VOL,LOW-Level Output Voltage<br>~~es~~<br>~~(QO~~<br>~~Rs~~|3 mA sink current<br>~~ee ~~<br><br>~~(QO~~<br>~~ee~~<br>|0<br> ~~ee~~<br><br>~~(QO~~<br>~~ee~~<br>|~~es ~~<br><br>~~(QO~~<br>~~QQ~~<br>~~ee~~|0.4<br> ~~ee ~~<br>~~(QO~~<br>~~QQ~~<br>~~ee~~|V<br> ~~ee~~<br>~~(QO~~||
|IOL, LOW-Level Output Current<br>~~ee~~<br>~~Rs~~|VOL=0.4V<br>VOL=0.6V<br>~~ee~~<br>~~ee~~<br>|~~ee~~<br>~~ee~~<br>|3<br>6<br>~~QQ~~<br>~~ee~~<br>~~ee~~|~~QQ~~<br>~~ee~~<br>~~ee~~|mA<br>mA<br>~~ee~~||
|Output Leakage Current<br>~~Rs~~|~~ee~~<br>~~GG~~<br>~~ee~~|~~ee~~<br>~~GG~~<br>~~ee~~|100<br>~~ee~~<br>~~ee~~|~~ee~~<br>~~ee~~|nA<br>~~ee~~||
|tof, Output Fall Time from VIHmaxto<br>VILmax<br>~~Rs~~<br>~~ee~~|Cbbus capacitance in pf<br>~~ee ~~<br><br>~~ee~~<br>~~ee~~|20+0.1Cb<br> ~~ee ~~<br><br>~~ee~~<br>~~ee~~|~~ee~~<br>~~ee~~<br>~~ee~~|300<br>~~ee~~<br>~~ee~~<br>~~ee~~|ns<br>~~ee~~<br>~~ee~~||



Page 12 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

|**INTERNAL CLOCK SOURCE**<br>~~|~~<br>~~oo~~|**INTERNAL CLOCK SOURCE**<br>~~|~~<br>~~oo~~|**INTERNAL CLOCK SOURCE**<br>~~|~~<br>~~oo~~|**INTERNAL CLOCK SOURCE**<br>~~|~~<br>~~oo~~|**INTERNAL CLOCK SOURCE**<br>~~|~~<br>~~oo~~|**INTERNAL CLOCK SOURCE**<br>~~|~~<br>~~oo~~|**INTERNAL CLOCK SOURCE**<br>~~|~~<br>~~oo~~|
|---|---|---|---|---|---|---|
|Sample Rate<br>~~oo~~<br>~~ee~~|FCHOICE_B=1,2,3<br>SMPLRT_DIV=0||32||kHz|2|
||FCHOICE_B=0;<br>DLPFCFG=0 or 7<br>SMPLRT_DIV=0||8||kHz|2|
||FCHOICE_B=0;<br>DLPFCFG=1,2,3,4,5,6;<br>SMPLRT_DIV=0<br>~~ee~~|~~ee~~|1|~~ee~~|kHz<br>~~ee~~|2<br>~~ee~~|
|Clock Frequency Initial Tolerance<br>~~oo~~<br>~~ee~~<br>|CLK_SEL=0, 6 or gyro<br>inactive;25°C<br>~~ee~~|~~ee~~<br>~~es~~|±1<br>~~ee~~|~~ee~~<br>~~ee~~|%<br>~~ee~~|1<br>~~ee~~|
||CLK_SEL=1,2,3,4,5 and gyro<br>active;25°C<br>~~ee~~<br>~~es~~<br>|~~ee~~<br>~~es~~<br>~~es~~<br>|±0.2<br>~~es~~<br>~~ee~~<br>|~~ee~~<br>~~es~~<br>~~ee~~<br>|%<br>~~ee~~<br>~~es~~<br>|1<br>~~ee~~<br>~~es~~<br>~~—~~|
|Frequency Variation over<br>Temperature<br>~~ee~~<br>~~ye~~|CLK_SEL=0,6 or gyro<br>inactive<br>~~ee ~~<br>~~ye~~|~~ee~~<br>~~es ~~<br>~~ye~~|±2<br> ~~ee~~<br>~~ye~~|~~ee~~<br>~~ee~~<br>~~ye~~|%<br>~~ee~~<br>~~ye~~|1<br>~~ee~~<br>~~ye—~~|
||CLK_SEL=1,2,3,4,5 and gyro<br>active<br>~~ye~~<br>~~ee~~|~~ye~~<br>~~ee~~|±0.2<br>~~ye~~<br>~~ee~~|~~ye~~<br>~~ee~~|%<br>~~ye~~<br>~~ee~~|1<br>~~ye—~~<br>~~ee~~|



2. Guaranteed by design. 

## **Other Electrical Specifications** 

Typical Operating Circuit of section 4.2, VDD = 1.8V, VDDIO = 1.8V, TA = 25°C, unless otherwise noted. 

|**PARAMETER**|**CONDITIONS**|**MIN**|**TYP**|**MAX**|**UNITS**|**NOTES**|
|---|---|---|---|---|---|---|
|**SERIAL INTERFACE**|||||||
|SPI Operating Frequency, All<br>Registers Read/Write|Low Speed Characterization||100<br>±10%||kHz|1|
||High Speed Characterization||1|8|MHz|1,2|
|SPI Modes|||Modes 0<br>and 3||||
|I2C Operating Frequency|All registers,Fast-mode|||400|kHz|1|
||All registers,Standard-mode|||100|kHz|1|



**Table 5. Other Electrical Specifications** 

## **Notes** : 

1. Based on characterization data on a limited number of parts. 

2. SPI clock duty cycle between 45% and 55% should be used for 8-MHz operation. 

Page 13 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

## **I[[2]] C TIMING CHARACTERIZATION** 

## 3.4 **I[[2]] C TIMING CHARACTERIZATION** Typical Operating Circuit of section 4.2, VDD = 1.8V, VDDIO = 1.8V, TA = 25°C, unless otherwise noted. ~~Cf~~ **PARAMETERS CONDITIONS MIN TYP MAX UNITS NOTES** 

|**PARAMETERS**<br>~~Cf~~<br>~~en~~|**CONDITIONS**<br>~~Cf~~<br>~~QQ~~|**MIN**<br>~~Cf~~<br>~~QQ~~|**TYP**<br>~~Cf~~<br>~~QQ~~|**MAX**<br>~~Cf~~<br>~~QQ~~|**UNITS**<br>~~Cf~~|**NOTES**<br>~~Cf~~|
|---|---|---|---|---|---|---|
|**I2C TIMING**<br>~~en~~<br>~~es~~|**I2C FAST-MODE**<br>~~QQ~~<br>~~QO~~|~~QQ~~<br>~~QO~~|~~QQ~~<br>~~QO~~|~~QQ~~<br>~~QO~~|||
|fSCL,SCL Clock Frequency<br>~~en~~<br>~~es~~<br>~~es~~|~~QQ~~<br>~~QO~~<br>~~es~~|~~QQ~~<br>~~QO~~<br>~~rs~~|~~QQ~~<br>~~QO~~<br>~~ns~~|400<br>~~QQ~~<br>~~QO~~<br>~~I~~|kHz<br>~~I~~|1|
|tHD.STA, (Repeated) START Condition Hold Time<br>~~es~~<br>~~rs~~<br>~~es~~|~~QO~~<br>~~rs~~<br>~~es~~|0.6<br>~~QO~~<br>~~rs~~<br>~~rs~~|~~QO~~<br>~~rs~~<br>~~ns~~|~~QO~~<br>~~rs~~<br>~~I~~|µs<br>~~rs~~<br>~~I~~|1<br>~~rs~~|
|tLOW,SCL Low Period<br>~~es~~<br>~~es~~|~~es~~<br>~~**QO**~~|1.3<br>~~rs~~<br>~~**QO**~~|~~ns~~<br>~~**QO**~~|~~I~~<br>~~**QO**~~|µs<br>~~I~~|1|
|tHIGH,SCL High Period<br>~~es~~<br>~~es~~|~~es~~<br>~~**QO**~~|0.6<br>~~rs ~~<br>~~**QO**~~|~~ns ~~<br>~~**QO**~~|~~I ~~<br>~~**QO**~~|µs<br> ~~I~~|1|
|tSU.STA, Repeated START Condition SetupTime<br>~~es~~<br>~~Df~~<br>~~es~~|~~**QO**~~<br>~~Df~~<br>~~QO~~|0.6<br>~~**QO**~~<br>~~Df~~<br>~~QO~~|~~**QO**~~<br>~~Df~~<br>~~QO~~|~~**QO**~~<br>~~Df~~<br>~~QO~~|µs<br>~~Df~~<br>~~QO~~|1<br>~~Df~~|
|tHD.DAT,SDA Data Hold Time<br>~~RD~~<br>~~es~~|~~RD~~<br>~~QO~~|0<br>~~RD~~<br>~~QO~~|~~RD~~<br>~~QO~~|~~RD~~<br>~~QO~~|µs<br>~~RD~~<br>~~QO~~|1<br>~~RD~~|
|tSU.DAT,SDA Data SetupTime<br>~~es~~<br>~~es~~|~~QO~~<br>~~**QO**~~|100<br>~~QO~~<br>~~**QO**~~|~~QO~~<br>~~**QO**~~|~~QO~~<br>~~**QO**~~|ns<br>~~QO~~|1|
|tr,SDA and SCL Rise Time<br>~~es~~<br>~~es~~|Cbbus cap. from 10 to 400pF<br>~~QO~~<br>~~**QO**~~|20+0.1Cb<br>~~QO~~<br>~~**QO**~~|~~QO~~<br>~~**QO**~~|300<br>~~QO~~<br>~~**QO**~~|ns<br>~~QO~~|1|
|tf,SDA and SCL Fall Time<br>~~es~~<br>~~es~~<br>~~Ce~~|Cbbus cap. from 10 to 400pF<br>~~**QO**~~<br>~~es~~<br>|20+0.1Cb<br>~~**QO**~~<br>~~es~~<br>|~~**QO**~~<br>~~es~~<br>|300<br>~~**QO**~~<br>~~es~~<br>|ns<br>~~es~~<br>|1<br>~~es~~<br>|
|tSU.STO, STOP Condition Setup Time<br>~~Ce~~||0.6<br>|||µs<br>|1<br>|
|tBUF, Bus Free Time Between STOP and START<br>Condition<br>~~Ce~~||1.3<br>|||µs<br>|1<br>|
|Cb,Capacitive Load for each Bus Line<br>~~GQ~~|~~GQ~~|~~GQ~~|< 400<br>~~GQ~~|~~GQ~~|pF<br>~~GQ~~|1<br>~~GQ~~|
|tVD.DAT,Data Valid Time<br>~~GG~~|~~GG~~|~~GG~~|~~GG~~|0.9<br>~~GG~~|µs<br>~~GG~~|1<br>~~GG~~|
|tVD.ACK,Data Valid Acknowledge Time<br>~~GG~~<br>~~PQ~~|~~GG~~<br>~~PQ~~|~~GG~~<br>~~PQ~~|~~GG~~<br>~~PQ~~|0.9<br>~~GG~~<br>~~PQ~~|µs<br>~~GG~~<br>~~PQ~~|1<br>~~GG~~<br>~~PQ~~|



## **Table 6. I[2] C Timing Characteristics** 

**Notes** : 1. Based on characterization of 5 parts over temperature and voltage as mounted on evaluation board or in sockets. 

**==> picture [473 x 143] intentionally omitted <==**

**----- Start of picture text -----**<br>
tf tr tSU.DAT<br>SDA . 70% : 70% er epeccse al Cab<br>30% 30%<br>tf continued below at  A<br>: i N tr — an tVD.DAT s aa a<br>SCL 70% tHD.DAT 70%<br>30% 30%<br>tHD.STA 1/fSCL tLOW 9 [th]  clock cycle<br>S 1 [st]  clock cycle tHIGH<br>tBUF<br>SDA 70%<br>A 30%<br>tSU.STA tHD.STA tVD.ACK tSU.STO<br>SCL 70%<br>30%<br>Sr 9 [th]  clock cycle P S<br>**----- End of picture text -----**<br>


**Figure 1. I[2] C Bus Timing Diagram** 

Page 14 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

## **SPI TIMING CHARACTERIZATION** 

Typical Operating Circuit of section 4.2, VDD = 1.8V, VDDIO = 1.8V, TA = 25°C, unless otherwise noted. 

|**PARAMETERS**<br>~~eG~~|**CONDITIONS**<br>~~eG~~|**MIN**<br>~~eG~~<br>~~GO~~|**TYP**<br>~~eG~~<br>~~GO~~|**MAX**<br>~~eG~~<br>~~OO~~|**UNITS**<br>~~eG~~|**NOTES**<br>~~eG~~|
|---|---|---|---|---|---|---|
|**SPI TIMING**<br>~~CG~~|~~CG~~|~~GO~~<br>~~CG~~|~~GO~~<br>~~CG~~|~~OO~~<br>~~CG~~|~~CG~~|~~CG~~|
|fSPC, SPC Clock Frequency<br>~~(GOO~~|~~(GOO~~|~~(GOO~~|~~(GOO~~|8<br>~~(GOO~~|MHz<br>~~(GOO~~|1<br>~~(GOO~~|
|tLOW, SPC Low Period<br>~~Pf~~|~~Pf~~|56<br>~~Pf~~|~~Pf~~|~~Pf~~|ns<br>~~Pf~~|1<br>~~Pf~~|
|tHIGH, SPC High Period<br>~~Pf~~|~~Pf~~|56<br>~~Pf~~|~~Pf~~|~~Pf~~|ns<br>~~Pf~~|1<br>~~Pf~~|
|tSU.CS, CS Setup Time<br>~~Pf~~|~~Pf~~|2<br>~~Pf~~|~~Pf~~|~~Pf~~|ns<br>~~Pf~~|1<br>~~Pf~~|
|tHD.CS, CS Hold Time<br>~~Pf~~|~~Pf~~|63<br>~~Pf~~|~~Pf~~|~~Pf~~|ns<br>~~Pf~~|1<br>~~Pf~~|
|tSU.SDI, SDI Setup Time<br>~~Pf~~|~~Pf~~|3<br>~~Pf~~|~~Pf~~|~~Pf~~|ns<br>~~Pf~~|1<br>~~Pf~~|
|tHD.SDI, SDI Hold Time<br>~~Pf~~|~~Pf~~|7<br>~~Pf~~|~~Pf~~|~~Pf~~|ns<br>~~Pf~~|1<br>~~Pf~~|
|tVD.SDO, SDO Valid Time<br>~~Pf~~|Cload= 20 pF<br>~~Pf~~|~~Pf~~|~~Pf~~<br>~~OO~~|40<br>~~Pf~~<br>~~OO~~|ns<br>~~Pf~~|1<br>~~Pf~~|
|tHD.SDO, SDO Hold Time<br>~~GG~~|Cload= 20 pF<br>~~GG~~|6<br>~~GG~~|~~GG~~<br>~~OO~~|~~GG~~<br>~~OO~~|ns<br>~~GG~~|1<br>~~GG~~|
|tDIS.SDO, SDO Output Disable Time<br>~~GQ~~|~~GQ~~|~~GQ~~|~~OO~~<br>~~GQ~~<br>~~OO~~|20<br>~~OO~~<br>~~GQ~~<br>~~OO~~|ns<br>~~GQ~~|1<br>~~GQ~~|
|tFall, SCLK Fall Time<br>~~GG~~|~~GG~~|~~GG~~|~~GG~~<br>~~OO~~<br>~~(~~|6.5<br>~~GG~~<br>~~OO~~|ns<br>~~GG~~|2<br>~~GG~~|
|tRise, SCLK Rise Time<br>~~GG~~<br>~~sf~~|~~GG~~<br>~~sf~~|~~GG~~<br>~~sf~~|~~GG~~<br>~~OO~~<br>~~sf~~<br>~~(~~|6.5<br>~~GG~~<br>~~OO~~<br>~~sf~~|ns<br>~~GG~~<br>~~sf~~|2<br>~~GG~~<br>~~sf~~|



**Table 7. SPI Timing Characteristics (8 MHz Operation)** 

## **Notes** : 

1. Based on characterization of 5 parts over temperature and voltage as mounted on evaluation board or in sockets. 

2. Based on other parameter values. 

**==> picture [463 x 139] intentionally omitted <==**

**----- Start of picture text -----**<br>
CS 70%<br>30%<br>tFall tRise tHD;CS<br>tSU;CS tHIGH 1/fCLK<br>SCLK 70%<br>30%<br>tSU;SDI tHD;SDI tLOW<br>aan | |<br>SDI 70% MSB IN LSB IN<br>30%<br>tVD;SDO tHD;SDO tDIS;SDO<br>SDO 70%<br>MSB OUT LSB OUT<br>30%<br>**----- End of picture text -----**<br>


**Figure 2. SPI Bus Timing Diagram** 

Page 15 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

## **ABSOLUTE MAXIMUM RATINGS** 

Stress above those listed as “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these conditions is not implied. Exposure to the absolute maximum ratings conditions for extended periods may affect device reliability. 

|**PARAMETER**|**RATING**|
|---|---|
|SupplyVoltage,VDD|-0.5V to 4V|
|SupplyVoltage,VDDIO|-0.5V to 4V|
|REGOUT|-0.5V to 2V|
|Input Voltage Level(SA0,FSYNC,SCL,SDA)|-0.5V to VDDIO + 0.5V|
|Acceleration(AnyAxis,unpowered)|10,000_g_for 0.2 ms|
|Operatingtemperature range|-40°C to 105°C|
|Storage Temperature Range|-40°C to 125°C|
|Electrostatic Discharge (ESD) Protection|2 kV (HBM);<br>750V (CDM corner pins)<br>500V(CDM all otherpins)|
|Latch-up|JEDEC Class II (2),125°C<br>±100 mA|
|Ultrasonic excitation(cleaning/welding/…)|Not allowed|



**Table 8. Absolute Maximum Ratings** 

## **THERMAL INFORMATION** 

|**THERMAL METRIC**|**DESCRIPTION**|**VALUE**|
|---|---|---|
|θJA|Junction-to-ambient thermal resistance|84.58 °C/W|
|ψJT|Junction-to-topcharacterizationparameter|7 °C/W|



**Table 9. Thermal Information** 

Page 16 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

## _**4 APPLICATIONS INFORMATION**_ 

## **PIN OUT DIAGRAM AND SIGNAL DESCRIPTION** 

|**PIN NUMBER**<br> ~~eS~~|**PIN NAME**<br>~~eS~~|**PIN DESCRIPTION**<br>~~eS~~|
|---|---|---|
|1<br> ~~eS~~<br>~~a~~|VDDIO<br>~~eS~~|Digital I/O supplyvoltage<br>~~eS~~|
|2<br>~~a~~<br>~~es~~|SCL/SPC|I2C serial clock(SCL);SPI serial clock(SPC)|
|3<br>~~es~~<br>~~**e**e~~|SDA/SDI|I2C serial data(SDA);SPI serial data input(SDI)|
|4<br>~~es~~<br>~~**e**e~~|SA0/SDO|I2C slave address LSB(SA0);SPI serial data output(SDO)|
|5<br>~~**e**e~~|CS|Chipselect(0 = SPI mode;1 = I2C mode)<br>~~G~~|
|6<br>~~a~~<br>~~es~~|INT|Interrupt digital output(totempole or open-drain)|
|7<br>~~es~~<br>~~**e**e~~|RESV|Reserved. Do not connect|
|8<br>~~es~~<br>~~**e**e~~|FSYNC|Synchronization digital input(optional). Connect to GND if unused|
|9<br>~~**e**e~~|RESV|Reserved. Connect to GND<br>~~G~~|
|10<br>~~aa~~|RESV<br>~~aa~~|Reserved. Connect to GND<br>~~aa~~|
|11<br>~~a~~|RESV<br>~~a~~|Reserved. Connect to GND|
|12<br>~~a~~|RESV<br>~~a~~<br>~~a~~|Reserved. Connect to GND|
|13<br>~~a~~<br>~~a~~|GND<br>~~a~~<br>~~a~~<br>~~a~~|Connect to GND|
|14<br>~~a ~~<br>~~sO~~|REGOUT<br> ~~a~~<br>~~sO~~|Regulator filter capacitor connection<br>~~sO~~|
|15<br>~~a~~|RESV|Reserved. Connect to GND|
|16<br>~~a~~<br>~~a~~|VDD|Power Supply|



**Table 10. Signal Descriptions** 

**Note** : VDD, VDDIO, SCL/SPC and CS pins must be correctly managed at power-up to guarantee proper IAM-20680HP start-up. Please refer to sections 4.18.1 and 4.18.2 for detailed power-up instructions. 

**==> picture [348 x 156] intentionally omitted <==**

**----- Start of picture text -----**<br>
16 15 14<br>VDDIO 1 13 GND<br>+Z<br>SCL/SPC 2 12 RESV<br>SDA/SDI 3 IAM-20680HP 11 RESV<br>SA0/SDO 4 10 RESV<br>CS 5 9 RESV<br>+Y +X<br>6 7 8<br>VDD<br>INT<br>RESV REGOUT<br>RESV FSYNC<br>**----- End of picture text -----**<br>


**LGA Package (Top View) 16-pin, 3mm x 3mm x 0.75mm Orientation of Axes of Sensitivity and Polarity of Rotation Typical Footprint and thickness** 

**Figure 3. Pin out Diagram for IAM-20680HP 3.0x3.0x0.75 mm[3] LGA** 

Page 17 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

## **TYPICAL OPERATING CIRCUIT** 

**==> picture [455 x 255] intentionally omitted <==**

**----- Start of picture text -----**<br>
1.8 – 3.3VDC<br>VDD<br>C2, 0.1 mF C4, 2.2 mF |<br>REGOUT<br>ee =o»<br>16 15 14<br>oe<br>VDDIO GND hy C1, 0.47 mF<br>1.8 – 3.3 VDC 1 13<br>C3, 10 nF SCL/SPC RESV<br>hy SCLSDA SDA/SDI 23 IAM-20680HP 1211 RESV<br>AD0 SA0/SDO 4 10 RESV<br>VDDIO<br>CS RESV<br>5 9<br>6 7 8<br>RESV<br>INT RESV FSYNC<br>**----- End of picture text -----**<br>


**Figure 4. IAM-20680HP LGA Application Schematic** 

**Note** : I[2] C lines are open drain and pullup resistors (e.g. 10 kΩ) are required. 

## **BILL OF MATERIALS FOR EXTERNAL COMPONENTS** 

|**COMPONENT**|**LABEL**|**SPECIFICATION**|**QUANTITY**|
|---|---|---|---|
|REGOUT Capacitor|C1|X7R, 0.47 µF ±10%|1|
|VDD Bypass Capacitors|C2|X7R, 0.1 µF ±10%|1|
||C4|X7R, 2.2 µF ±10%|1|
|VDDIO Bypass Capacitor|C3|X7R, 10 nF ±10%|1|



**Table 11. Bill of Materials** 

Page 18 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

## **BLOCK DIAGRAM** 

**==> picture [390 x 300] intentionally omitted <==**

**----- Start of picture text -----**<br>
IAM-20680HP<br>INT<br>Self<br>X Accel ADC<br>test Interrupt<br>Status<br>Register<br>CS<br>Oey Self test Y Accel ADC eC Slave I2C and  SA0 / SDO<br>SPI Serial<br>FIFO<br>Interface SCL / SPC<br>Goes Self test Z Accel ADC User & Config  — y = SDA / SDI<br>Registers<br>LIS} | ee aS FSYNC<br>Self<br>test X Gyro AD C Sensor<br>Registers<br>Self<br>test Y Gyro ADC<br>a Self test t: Z Gyro AD C<br>HLH<br>Temp Sensor ADC<br>H i<br>Charge  Bias & LDOs<br>Pump<br>VDD GND REGOUT<br>Signal Conditioning<br>**----- End of picture text -----**<br>


**Figure 5. IAM-20680HP Block Diagram** 

## **OVERVIEW** 

The IAM-20680HP is comprised of the following key blocks and functions: 

- Three-axis MEMS rate gyroscope sensor with 16-bit ADCs and signal conditioning 

- Three-axis MEMS accelerometer sensor with 16-bit ADCs and signal conditioning 

- Primary I[2] C and SPI serial communications interfaces 

- Self-Test 

- Clocking 

- Sensor Data Registers 

- FIFO 

- Interrupts 

- Digital-Output Temperature Sensor 

- Bias and LDOs 

- Charge Pump 

- Standard Power Modes 

Page 19 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

## **THREE-AXIS MEMS GYROSCOPE WITH 16-BIT ADCS AND SIGNAL CONDITIONING** 

The IAM-20680HP consists of three independent vibratory MEMS rate gyroscopes, which detect rotation about the X-, Y-, and Z- Axes. When the gyros are rotated about any of the sense axes, the Coriolis Effect causes a vibration that is detected by a capacitive pickoff. The resulting signal is amplified, demodulated, and filtered to produce a voltage that is proportional to the angular rate. This voltage is digitized using individual on-chip 16-bit Analog-to-Digital Converters (ADCs) to sample each axis. The full-scale range of the gyro sensors may be digitally programmed to ±250, ±500, ±1000, or ±2000 degrees per second (dps). The ADC sample rate is programmable from 8,000 samples per second, down to 3.9 samples per second, and user-selectable low-pass filters enable a wide range of cut-off frequencies. 

## **THREE-AXIS MEMS ACCELEROMETER WITH 16-BIT ADCS AND SIGNAL CONDITIONING** 

The IAM-20680HP’s 3-Axis accelerometer uses separate proof masses for each axis. Acceleration along a particular axis induces displacement on the corresponding proof mass, and capacitive sensors detect the displacement differentially. The IAM-20680HP’s architecture reduces the accelerometers’ susceptibility to fabrication variations as well as to thermal drift. When the device is placed on a flat surface, it will measure 0 _g_ on the X- and Y-axes and +1 _g_ on the Z-axis. The accelerometers’ scale factor is calibrated at the factory and is nominally independent of supply voltage. Each sensor has a dedicated sigma-delta ADC for providing digital outputs. The full-scale range of the digital output can be adjusted to ±2 _g_ , ±4 _g_ , ±8 _g_ , or ±16 _g_ . 

## **I[2] C AND SPI SERIAL COMMUNICATIONS INTERFACES** 

The IAM-20680HP communicates to a system processor using either a SPI or an I[2] C serial interface. The IAM-20680HP always acts as a slave when communicating to the system processor. The LSB of the I[2] C slave address is set by pin 4 (SA0). 

## **IAM-20680HP Solution Using I[2] C Interface** 

In Figure 6, the system processor is an I[2] C master to the IAM-20680HP. 

**Figure 6. IAM-20680HP Solution Using I[2] C Interface** 

Page 20 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

## **IAM-20680HP Solution Using SPI Interface** 

In Figure 7, the system processor is an SPI master to the IAM-20680HP. Pins 2, 3, 4, and 5 are used to support the SPC, SDI, SDO, and CS signals for SPI communications. 

**Figure 7. IAM-20680HP Solution Using SPI Interface** 

## **SELF-TEST** 

Self-test allows for the testing of the mechanical and electrical portions of the sensors. The self-test for each measurement axis can be activated by means of the gyroscope and accelerometer self-test registers (registers 27 and 28). 

When the self-test is activated, the electronics cause the sensors to be actuated and produce an output signal. The output signal is used to observe the self-test response. 

The self-test response is defined as follows: 

SELF-TEST RESPONSE = SENSOR OUTPUT WITH SELF-TEST ENABLED – SENSOR OUTPUT WITH SELF-TEST DISABLED 

When the value of the self-test response is within the specified min/max limits of the product specification, the part has passed selftest. When the self-test response exceeds the min/max values, the part is deemed to have failed self-test. 

## 4.10 **CLOCKING** 

The IAM-20680HP has a flexible clocking scheme, allowing a variety of internal clock sources to be used for the internal synchronous circuitry. This synchronous circuitry includes the signal conditioning and ADCs, and various control circuits and registers. An on-chip PLL provides flexibility in the allowable inputs for generating this clock. 

Allowable internal sources for generating the internal clock are: 

- a) An internal relaxation oscillator 

- b) Auto-select between internal relaxation oscillator and gyroscope MEMS oscillator to use the best available source 

The only setting supporting specified performance in all modes is option b). It is recommended that option b) be used. 

## **SENSOR DATA REGISTERS** 

The sensor data registers contain the latest gyroscope, accelerometer, and temperature measurement data. They are read-only registers and are accessed via the serial interface. Data from these registers may be read anytime. 

Page 21 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

## **FIFO** 

The IAM-20680HP contains a 4096-byte FIFO register that is accessible via the Serial Interface. The FIFO configuration register determines which data are written into the FIFO. Possible choices include gyro data, accelerometer data, temperature readings, and FSYNC input. A FIFO counter keeps track of how many bytes of valid data are contained in the FIFO. The FIFO register supports burst reads. The interrupt function may be used to determine when new data are available. 

## **INTERRUPTS** 

Interrupt functionality is configured via the Interrupt Configuration register. Items that are configurable include the INT pin configuration, the interrupt latching and clearing method, and triggers for the interrupt. Items that can trigger an interrupt are new data are available to be read (from the FIFO and Data registers) or FIFO overflow. The interrupt status can be read from the Interrupt Status register. 

## 4.14 **DIGITAL-OUTPUT TEMPERATURE SENSOR** 

An on-chip temperature sensor and ADC are used to measure the IAM-20680HP die temperature. The readings from the ADC can be read from the FIFO or the Sensor Data registers. 

## **BIAS AND LDOS** 

The bias and LDO section generates the internal supply and the reference voltages and currents required by the IAM-20680HP. Its two inputs are an unregulated VDD and a VDDIO logic reference supply voltage. The LDO output is bypassed by a capacitor at REGOUT. For further details on the capacitor, please refer to the Bill of Materials for External Components. 

## 4.16 **CHARGE PUMP** 

An on-chip charge pump generates the high voltage required for the MEMS oscillator. 

## **STANDARD POWER MODES** 

Table 12 lists the user-accessible power modes for IAM-20680HP. 

|**MODE**|**NAME**|**GYRO**|**ACCEL**|
|---|---|---|---|
|1|SleepMode|Off|Off|
|2|StandbyMode|Drive On|Off|
|4|Accelerometer Low-Noise Mode|Off|On|
|6|Gyroscope Low-Noise Mode|On|Off|
|7|6-Axis Low-Noise Mode|On|On|



**Table 12. Standard Power Modes for IAM-20680HP** 

## **Notes:** 

1. Power consumption for individual modes can be found in section 3.3.1. 

## 4.18 **SENSOR INITIALIZATION AND BASIC CONFIGURATION** 

The basic configuration of the IAM-20680HP includes the following steps: 

- Power-up sequence 

- Sensor initialization and clock source selection 

- Output data rate (i.e. sampling frequency) selection 

- Full scale range selection 

- Filter frequency selection 

- Power mode selection 

## **Power-up sequence** 

When applying VDD, VDDIO must be kept low until VDD is stable at its final voltage. Should this not be possible, power-up must be performed with both CS and SCL/SPC low. If starting in I[2] C mode (CS = logic high), power-up must be performed with SCL/SPC low. Power-up with SCL/SPC high is not a supported case and must be avoided. 

Page 22 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

## **Sensor Initialization and Clock Source Selection** 

When both VDD and VDDIO are stable at their final voltage a software reset is required to initialize the sensor and let the IAM20680HP select the best clock source. Software reset must be performed by setting the register PWR_MGMT_1 (address 0x6B) to 0x81 (see section 9.27), prior to initialization. 

## **Output Data Rate Selection** 

To set the output data rate (ODR) to the desired frequency, select the sample rate divider by setting the register SMPLRT_DIV(address 0x19) to the desired value (see section 9.9). For instance, to set the output data rate to 100 Hz, write 0x09 into SMPLRT_DIV. 

## **Full-Scale Range Selection** 

To set the full-scale range (FSR) of the accelerometer, set the register ACCEL_CONFIG (address 0x1C) to the desired value (see section 9.12). For instance, to set the FSR of the accelerometer to 2g, write 0x00 into ACCEL_CONFIG. 

To set the FSR of the gyroscope, set the register GYRO_CONFIG (address 0x1B) to the desired value (see section 9.11). For instance, to set the FSR of the gyroscope to 250 dps, write 0x00 into GYRO_CONFIG. 

## **Filter Selection** 

To set the corner frequency of the digital low-pass filter (DLPF) of the accelerometer, set the register ACCEL_CONFIG2 (address 0x1D) to the desired value (see section 9.13). For instance, to set the corner frequency of the DLPF of the accelerometer to 10.2 Hz, write 0x05 into ACCEL_CONFIG2. 

To set the corner frequency of the DLPF of the gyroscope, set the register CONFIG (address 0x1A) to the desired value (see section 9.10). For instance, to set the corner frequency of the DLPF of the gyroscope to 10 Hz, write 0x05 into CONFIG. 

Page 23 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

## _**5 PROGRAMMABLE INTERRUPTS**_ 

The IAM-20680HP has a programmable interrupt system which can generate an interrupt signal on the INT pin. Status flags indicate the source of an interrupt. Interrupt sources may be enabled and disabled individually. 

|**INTERRUPT NAME**|**MODULE**|
|---|---|
|Motion Detection|Motion|
|FIFO Overflow|FIFO|
|Data Ready|Sensor Registers|



## **Table 13. Table of Interrupt Sources** 

## **WAKE-ON-MOTION INTERRUPT** 

The IAM-20680 provides motion detection capability. A qualifying motion sample is one where the high passed sample from any axis has an absolute value exceeding a user-programmable threshold. The following steps explain how to configure the Wake-on-Motion Interrupt. 

## _**Step 1: Ensure that Accelerometer is running**_ 

- In PWR_MGMT_1 register (0x6B) set CYCLE = 0, SLEEP = 0, and GYRO_STANDBY = 0 

- In PWR_MGMT_2 register (0x6C) set STBY_XA = STBY_YA = STBY_ZA = 0, and STBY_XG = STBY_YG = STBY_ZG = 1 

## _**Step 2: Accelerometer Configuration**_ 

- In ACCEL_CONFIG2 register (0x1D) set ACCEL_FCHOICE_B = 0 and A_DLPF_CFG[2:0] = 7 (b111) 

## _**Step 3: Enable Motion Interrupt**_ 

- In INT_ENABLE register (0x38) set WOM_INT_EN[2:0] = b111 to enable motion interrupt 

## _**Step 4: Set Motion Threshold**_ 

- Set the motion threshold in ACCEL_WOM_THR register (0x1F) 

## _**Step 5: Enable Accelerometer Hardware Intelligence**_ 

- In ACCEL_INTEL_CTRL register (0x69) set ACCEL_INTEL_EN = 1 to enable the Wake-on-Motion detection logic 

- In ACCEL_INTEL_CTRL register (0x69) set ACCEL_INTEL_MODE = 1 to make the detection insensitive to the acceleration DCcomponent 

- In ACCEL_INTEL_CTRL register (0x69) ensure that bit 0 is set to 0. 

## _**Step 6: Set Frequency of Wake-Up**_ 

- In SMPLRT_DIV register (0x19) set SMPLRT_DIV[7:0] = 3.9Hz – 500Hz 

## _**Step 7: Enable Cycle Mode (Accelerometer Low-Power Mode)**_ 

- In LP_MOD_CFG register (0x1E) set LP_MOD_CTRL [3:0] = b1001 

- In PWR_MGMT_1 register (0x6B) set ACCEL_CYCLE = 1 

Page 24 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

## _**6 DIGITAL INTERFACE**_ 

## **I[2] C AND SPI SERIAL INTERFACES** 

The internal registers and memory of the IAM-20680HP can be accessed using either I[2] C at 400 kHz or SPI at 8 MHz. SPI operates in four-wire mode. 

|**PIN NUMBER**|**PIN NAME**|**PIN DESCRIPTION**|
|---|---|---|
|1|VDDIO|Digital I/O supply voltage.|
|4|SA0 / SDO|I2C Slave Address LSB (SA0); SPI serial data output (SDO)|
|2|SCL/SPC|I2C serial clock(SCL);SPI serial clock(SPC)|
|3|SDA/SDI|I2C serial data(SDA);SPI serial data input(SDI)|



**Note** : To prevent switching into I[2] C mode when using SPI, the I[2] C interface should be disabled by setting the _I2C_IF_DIS_ configuration bit. Setting this bit should be performed immediately after waiting for the time specified by the “Start-Up Time for Register Read/Write” in section 3.3.2. 

For further information regarding the I2C_IF_DIS bit, please refer to sections 8 and 9 of this document. 

## **I[2] C INTERFACE** 

I[2] C is a two-wire interface comprised of the signals serial data (SDA) and serial clock (SCL). In general, the lines are open-drain and bidirectional. In a generalized I[2] C interface implementation, attached devices can be a master or a slave. The master device puts the slave address on the bus, and the slave device with the matching address acknowledges the master. 

The IAM-20680HP always operates as a slave device when communicating to the system processor, which acts as the master. SDA and SCL lines typically need pull-up resistors to VDD. The maximum bus speed is 400 kHz. 

The slave address of the IAM-20680HP is b110100X which is 7 bits long. The LSB bit of the 7-bit address is determined by the logic level on pin SA0. This allows two IAM-20680HPs to be connected to the same I[2] C bus. When used in this configuration, the address of one of the devices should be b1101000 (pin SA0 is logic low) and the address of the other should be b1101001 (pin SA0 is logic high). 

## **IC COMMUNICATIONS PROTOCOL** 

## _START (S) and STOP (P) Conditions_ 

Communication on the I[2] C bus starts when the master puts the START condition (S) on the bus, which is defined as a HIGH-to-LOW transition of the SDA line while SCL line is HIGH (see figure below). The bus is considered busy until the master puts a STOP condition (P) on the bus, which is defined as a LOW to HIGH transition on the SDA line while SCL is HIGH (see Figure 8). 

Additionally, the bus remains busy if a repeated START (Sr) is generated instead of a STOP condition. 

**==> picture [364 x 84] intentionally omitted <==**

**----- Start of picture text -----**<br>
SDA<br>|<br>SCL<br>S P<br>| | —__/<br>I<br>START condition STOP condition<br>**----- End of picture text -----**<br>


**Figure 8. START and STOP Conditions** 

## _Data Format / Acknowledge_ 

I[2] C data bytes are defined to be 8-bits long. There is no restriction to the number of bytes transmitted per data transfer. Each byte transferred must be followed by an acknowledge (ACK) signal.  The clock for the acknowledge signal is generated by the master, while the receiver generates the actual acknowledge signal by pulling down SDA and holding it low during the HIGH portion of the acknowledge clock pulse. 

Page 25 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

If a slave is busy and cannot transmit or receive another byte of data until some other task has been performed, it can hold SCL LOW, thus forcing the master into a wait state.  Normal data transfer resumes when the slave is ready, and releases the clock line (refer to Figure 9). 

**==> picture [414 x 142] intentionally omitted <==**

**----- Start of picture text -----**<br>
DATA OUTPUT BY<br>TRANSMITTER (SDA)<br>not acknowledge<br>DATA OUTPUT BY<br>RECEIVER (SDA)<br>$a,<br>acknowledge<br>7<br>SCL FROM<br>1 2 8 9<br>MASTER<br>clock pulse for<br>START  acknowledgement<br>condition<br>**----- End of picture text -----**<br>


**Figure 9. Acknowledge on the I[2] C Bus** 

## _Communications_ 

After beginning communications with the START condition (S), the master sends a 7-bit slave address followed by an 8[th] bit, the read/write bit. The read/write bit indicates whether the master is receiving data from or is writing to the slave device. Then, the master releases the SDA line and waits for the acknowledge signal (ACK) from the slave device. Each byte transferred must be followed by an acknowledge bit. To acknowledge, the slave device pulls the SDA line LOW and keeps it LOW for the high period of the SCL line. Data transmission is always terminated by the master with a STOP condition (P), thus freeing the communications line. However, the master can generate a repeated START condition (Sr), and address another slave without first generating a STOP condition (P). A LOW to HIGH transition on the SDA line while SCL is HIGH defines the stop condition. All SDA changes should take place when SCL is low, with the exception of start and stop conditions. 

**==> picture [402 x 114] intentionally omitted <==**

**----- Start of picture text -----**<br>
SDA<br>SCL 1 – 7 8 9 1 – 7 8 9 1 – 7 8 9<br>S P<br>a a YD |<br>START  ADDRESS R/W ACK DATA ACK DATA ACK STOP<br>condition condition<br>**----- End of picture text -----**<br>


**Figure 10. Complete I[2] C Data Transfer** 

To write the internal IAM-20680HP registers, the master transmits the start condition (S), followed by the I[2] C address and the write bit (0). At the 9[th] clock cycle (when the clock is high), the IAM-20680HP acknowledges the transfer. Then the master puts the register address (RA) on the bus. After the IAM-20680HP acknowledges the reception of the register address, the master puts the register data onto the bus. This is followed by the ACK signal, and data transfer may be concluded by the stop condition (P). To write multiple bytes after the last ACK signal, the master can continue outputting data rather than transmitting a stop signal. In this case, the IAM20680HP automatically increments the register address and loads the data to the appropriate register. The following figures show single and two-byte write sequences. 

_Single-Byte Write Sequence_ 

**==> picture [288 x 71] intentionally omitted <==**

Page 26 of 53 

_**IAM-20680HP**_ 

_Burst Write Sequence_ 

|Master<br>~~——~~|S<br>~~——~~|AD+W||RA||DATA||DATA||P|
|---|---|---|---|---|---|---|---|---|---|---|
|Slave<br>~~——~~|~~——~~||ACK||ACK||ACK||ACK||



To read the internal IAM-20680HP registers, the master sends a start condition, followed by the I[2] C address and a write bit, and then the register address that is going to be read. Upon receiving the ACK signal from the IAM-20680HP, the master transmits a start signal followed by the slave address and read bit. As a result, the IAM-20680HP sends an ACK signal and the data. The communication ends with a not acknowledge (NACK) signal and a stop bit from master. The NACK condition is defined such that the SDA line remains high at the 9[th] clock cycle. The following figures show single and two-byte read sequences. 

_Single-Byte Read Sequence_ 

|Master<br>S<br>AD+W<br>Slave<br>~~ee~~|Master<br>S<br>AD+W<br>Slave<br>~~ee~~|Master<br>S<br>AD+W<br>Slave<br>~~ee~~|Master<br>S<br>AD+W<br>Slave<br>~~ee~~|Master<br>S<br>AD+W<br>Slave<br>~~ee~~|ACK||RA<br>S<br>AD+R<br>ACK|ACK<br>DATA|NACK|P||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|_Burst Read Sequence_||||||||||||||
|Master<br>S<br>AD+W<br>RA<br>S<br>AD+R<br>ACK<br>NACK<br>P<br>Slave<br>ACK<br>ACK<br>ACK<br>DATA<br>DATA<br>~~ee~~<br>~~ee~~||||||||||||||
||**I2C TERMS**|||||||||||||
||||||**SIGNAL**||**SIGNAL**|**DESCRIPTION**||||||
||||||S||Start Condition: SDA goes from high to low while SCL is high|||||||
||||||AD||Slave I2C address|||||||
||||||W||Write bit (0)|||||||
||||||R||Read bit (1)|||||||
||||||ACK||Acknowledge: SDA line is low while the SCL line is high at the 9|||Acknowledge: SDA line is low while the SCL line is high at the 9thclock cycle||||
||||||NACK||Not-Acknowledge: SDA line stays high at the 9thclock cycle|||||||
||||||RA||IAM-20680HP internal register address|||||||
||||||DATA||Transmit or received data|||||||
||||||P||Stopcondition: SDAgoingfrom low to high while SCL is high|||||||



**Table 15. I[2] C Terms** 

Page 27 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

## **SPI INTERFACE** 

SPI is a 4-wire synchronous serial interface that uses two control lines and two data lines. The IAM-20680HP always operates as a Slave device during standard Master-Slave SPI operation. 

With respect to the Master, the Serial Clock output (SPC), the Serial Data Output (SDO) and the Serial Data Input (SDI) are shared among the Slave devices. Each SPI slave device requires its own Chip Select (CS) line from the master. 

CS goes low (active) at the start of transmission and goes back high (inactive) at the end. Only one CS line is active at a time, ensuring that only one slave is selected at any given time. The CS lines of the non-selected slave devices are held high, causing their SDO lines to remain in a high-impedance (high-z) state so that they do not interfere with any active devices. 

## _SPI Operational Features_ 

1. Data are delivered MSB first and LSB last 

2. Data are latched on the rising edge of SPC 

3. Data should be transitioned on the falling edge of SPC 

4. The maximum frequency of SPC is 8 MHz 

5. SPI read and write operations are completed in 16 or more clock cycles (two or more bytes). The first byte contains the SPI Address, and the following byte(s) contain(s) the SPI data. The first bit of the first byte contains the Read/Write bit and indicates the Read (1) or Write (0) operation. The following 7 bits contain the Register Address. In cases of multiplebyte Read/Writes, data are two or more bytes: 

## _SPI Address format_ 

|**MSB**|||||||**LSB**|
|---|---|---|---|---|---|---|---|
|R/W|A6|A5|A4|A3|A2|A1|A0|
|_SPI Data format_||||||||
|**MSB**|||||||**LSB**|
|D7|D6|D5|D4|D3|D2|D1|D0|



_SPI Data format_ 

6. Supports Single or Burst Read/Writes. 

**==> picture [190 x 126] intentionally omitted <==**

**----- Start of picture text -----**<br>
SPC<br>SDI<br>SPI Master SDO SPI Slave 1<br>CS1  CS<br>CS2<br>SPC<br>SDI<br>SDO<br>SPI Slave 2<br>CS<br>**----- End of picture text -----**<br>


**Figure 11. Typical SPI Master/Slave Configuration** 

Page 28 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

## _**7 SERIAL INTERFACE CONSIDERATIONS**_ 

## **IAM-20680HP SUPPORTED INTERFACES** 

The IAM-20680HP supports I[2] C communications on its serial interface **.** 

The IAM-20680HP’s I/O logic levels are set to be VDDIO. 

Figure 12 depicts a sample circuit of IAM-20680HP. It shows the relevant logic levels and voltage connections. 

**==> picture [355 x 216] intentionally omitted <==**

**----- Start of picture text -----**<br>
VDDIO<br>VDD_IO<br>(0V - VDDIO) SYSTEM BUS<br>System<br>VDD Processor IO<br>VDDIO<br>VDD INT (0V - VDDIO)<br>SDA (0V - VDDIO)<br>(0V - VDDIO) SCL (0V - VDDIO)<br>SYNC<br>VDDIO<br>IAM-20680HP<br>VDDIO<br>(0V, VDDIO)<br>va SA0<br>**----- End of picture text -----**<br>


**Figure 12. I/O Levels and Connections** 

Page 29 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

## _**8 REGISTER MAP**_ 

The following table lists the register map for the IAM-20680HP. 

|**Addr**<br>**(Hex)**<br>~~ee~~|**Addr**<br>**(Dec.)**<br>~~ee~~|**Register Name**<br>~~ee~~|**Serial**<br>**I/F**<br>~~ee~~|**Accessible**<br>**(writable)**<br>**in Sleep**<br>**Mode**<br>~~ee ee~~|**Bit7**<br>~~ee~~|**Bit6**<br>~~ee~~|**Bit5**<br>~~ee~~|**Bit4**<br>~~ee~~|**Bit3**<br>~~ee~~|**Bit2**<br>~~ee~~|**Bit1**<br>~~ee~~|**Bit0**<br>~~ee~~|
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|00<br>~~ee~~<br>~~a~~|00<br>~~ee~~<br>~~ss~~|SELF_TEST_X_GYRO<br>~~ee ~~<br>~~ss~~|R/W<br> ~~ee~~<br>~~es~~|N<br>~~ee ee~~<br>~~re~~|XG_ST_DATA[7:0]<br>~~eeee~~||||||||
|01<br>~~a~~|01<br>~~ss~~|SELF_TEST_Y_GYRO<br>~~ss~~|R/W<br>~~es~~|N<br>~~re~~|YG_ST_DATA[7:0]||||||||
|02<br>~~a ~~<br>~~a~~<br>~~a~~|02<br> ~~ss~~<br>~~a~~<br>~~ss~~|SELF_TEST_Z_GYRO<br>~~ss~~<br>~~ss~~<br>~~ss~~|R/W<br>~~es ~~<br>~~ss~~<br>~~es~~|N<br> ~~re~~<br>~~re~~|ZG_ST_DATA[7:0]||||||||
|0D<br>~~a~~|13<br>~~ss~~|SELF_TEST_X_ACCEL<br>~~ss~~|R/W<br>~~es~~|N<br>~~re~~|XA_ST_DATA[7:0]||||||||
|0E<br>~~a ~~<br>~~a~~<br>~~a~~|14<br> ~~ss~~<br>~~a~~<br>~~ss~~|SELF_TEST_Y_ACCEL<br>~~ss~~<br>~~ss~~<br>~~ss~~|R/W<br>~~es ~~<br>~~ss~~<br>~~es~~|N<br> ~~re~~<br>~~re~~|YA_ST_DATA[7:0]||||||||
|0F<br>~~a~~|15<br>~~ss~~|SELF_TEST_Z_ACCEL<br>~~ss~~|R/W<br>~~es~~|N<br>~~re~~|ZA_ST_DATA[7:0]||||||||
|13<br>~~a ~~<br>~~a~~<br>~~a~~|19<br> ~~ss~~<br>~~a~~<br>~~ss~~|XG_OFFS_USRH<br>~~ss~~<br>~~ss~~<br>~~ss~~|R/W<br>~~es ~~<br>~~ss~~<br>~~es~~|N<br> ~~re~~<br>~~re~~|X_OFFS_USR [15:8]||||||||
|14<br>~~a~~<br>~~a~~|20<br>~~ss~~<br>~~a~~|XG_OFFS_USRL<br>~~ss~~<br>~~es~~|R/W<br>~~es~~<br>~~es~~|N<br>~~re~~|X_OFFS_USR [7:0]||||||||
|15<br>~~a ~~<br>~~a~~|21<br> ~~ss~~<br>~~a~~|YG_OFFS_USRH<br>~~ss~~<br>~~es~~|R/W<br>~~es ~~<br>~~es~~|N<br> ~~re~~|Y_OFFS_USR [15:8]||||||||
|16<br>~~a ~~<br>~~a~~<br>~~a~~|22<br> ~~a~~<br>~~a~~|YG_OFFS_USRL<br>~~es ~~<br>~~eG~~<br>~~es~~|R/W<br> ~~es~~<br>~~eG~~<br>~~es~~|N<br>~~eG~~<br>~~er~~|Y_OFFS_USR [7:0]||||||||
|17<br>~~a~~<br>~~a~~|23<br>~~a~~|ZG_OFFS_USRH<br>~~eG~~<br>~~es~~|R/W<br>~~eG~~<br>~~es~~|N<br>~~eG~~<br>~~er~~|Z_OFFS_USR [15:8]||||||||
|18<br>~~a ~~<br>~~a~~<br>~~a~~|24<br> ~~a~~<br>~~a~~|ZG_OFFS_USRL<br>~~es~~<br>~~eG~~<br>~~es~~|R/W<br>~~es ~~<br>~~eG~~<br>~~es~~|N<br> ~~er~~<br>~~eG~~<br>~~ee~~|Z_OFFS_USR [7:0]||||||||
|19<br>~~a~~<br>~~a~~<br>~~a~~|25<br>~~a~~<br>~~a~~|SMPLRT_DIV<br>~~eG~~<br>~~es~~|R/W<br>~~eG~~<br>~~es~~<br>~~es~~|N<br>~~eG~~<br>~~ee~~<br>~~es~~|SMPLRT_DIV[7:0]<br>~~es ee~~||||||||
|1A<br>~~a ~~<br>~~a~~<br>~~Po~~|26<br> ~~a~~<br>~~a~~<br>~~Po~~|CONFIG<br>~~es~~|R/W<br>~~es ~~<br>~~es~~|N<br> ~~ee~~<br>~~es~~|-<br>~~es ee~~|FIFO_<br>MODE<br>~~ee~~|EXT_SYNC_SET[2:0]|||DLPF_CFG[2:0]|||
|1B<br>~~a~~<br>~~Po~~<br>~~a~~|27<br>~~a~~<br>~~Po~~<br>~~a~~|GYRO_CONFIG<br>~~ee~~|R/W<br>~~es~~<br>~~re~~|N<br>~~es~~<br>~~rr~~|XG_ST<br>~~es ee~~<br>~~sf~~|YG_ST<br>~~ee~~<br>~~sf~~|ZG_ST<br>~~sf~~|FS_SEL [1:0]||-|FCHOICE_B[1:0]||
|1C<br>~~Po~~<br>~~a~~<br>~~a~~|28<br>~~Po~~<br>~~a~~<br>~~a~~|ACCEL_CONFIG<br>~~ee~~<br>~~es~~|R/W<br>~~re~~<br>~~es~~|N<br>~~rr~~<br>~~es~~|XA_ST<br>~~sf~~<br>~~ee~~|YA_ST<br>~~sf~~<br>~~ee~~|ZA_ST<br>~~sf~~<br>~~ee~~|ACCEL_FS_SEL[1:0]<br>~~ee~~||-<br>~~ee~~|||
|1D<br>~~a~~<br>~~a~~|29<br>~~a~~<br>~~a~~|ACCEL_CONFIG 2<br>~~ee ~~<br>~~es~~|R/W<br> ~~re~~<br>~~es~~|N<br>~~rr ~~<br>~~es~~|FIFO_SIZE[1:0]<br> ~~sf~~<br>~~ee~~||DEC2_CFG[1:0]<br>~~sf~~<br>~~ee~~||ACCEL_FCHOI<br>CE_B<br>~~ee~~|A_DLPF_CFG[2:0]<br>~~ee~~|||
|1E<br>~~a~~<br>~~se~~|30<br>~~a~~<br>~~se~~|LP_MODE_CFG<br>~~es~~<br>~~se~~|R/W<br>~~es~~<br>~~se~~|N<br>~~es~~<br>~~se~~|GYRO_CYCL<br>E<br>~~ee~~<br>~~se~~|G_AVGCFG[2:0]<br>~~ee~~<br>~~se~~|||LP_MOD_CTRL[3:0]<br>~~ee~~<br>~~se~~||||
|1F<br>~~a~~<br>~~a~~|31<br>|ACCEL_WOM_THR<br>|R/W<br>|N<br>|WOM_THR[7:0]<br><br>~~s~~~~**e**~~||||||||
|23<br>~~aee~~<br>~~a~~|35<br>~~ee~~|FIFO_EN<br>~~ee~~<br>~~es rs~~|R/W<br>~~ee~~<br>~~rs~~|N<br>~~ee~~<br>~~er~~|TEMP<br>_FIFO_EN<br>~~ee~~<br>~~s~~<br>~~rs~~|XG_FIFO_EN<br>~~ee~~<br>~~s~~~~**e**~~<br>~~G~~|YG_FIFO_EN<br>~~ee~~<br>~~**e**~~<br>~~G~~|ZG_FIFO_EN<br>~~ee~~|ACCEL_FIFO_<br>EN<br>~~ee~~|-<br>~~ee~~|-<br>~~ee~~|-<br>~~ee~~|
|36<br>~~ee~~<br>~~a~~<br>~~ee~~|54<br>~~ee~~<br>~~ee~~|FSYNC_INT<br>~~ee~~<br>~~es rs~~<br>~~ee~~|R/C<br>~~ee~~<br>~~rs~~<br>~~ee~~|N<br>~~ee~~<br>~~er~~<br>~~ee~~|FSYNC_INT<br>~~ee~~<br>~~s~~<br>~~rs~~<br>~~ee~~|-<br>~~ee~~<br>~~s~~~~**e**~~<br>~~G~~<br>~~ee~~|-<br>~~ee~~<br>~~**e**~~<br>~~G~~<br>~~eee~~|-<br>~~ee~~<br>~~eee~~|-<br>~~ee~~<br>~~eee~~|-<br>~~ee~~<br>~~eee~~|-<br>~~ee~~<br>~~eee~~|-<br>~~ee~~<br>~~eee~~|
|37<br>~~ee~~<br>~~ee~~|55<br>~~ee~~<br>~~ee~~|INT_PIN_CFG<br>~~es rs~~<br>~~ee~~<br>~~ee~~|R/W<br>~~rs ~~<br>~~ee~~<br>~~ee~~|Y<br> ~~er~~<br>~~ee~~<br>~~ee~~|INT_LEVEL<br>~~rs~~<br>~~ee~~|INT_OPEN<br>~~G~~<br>~~ee~~<br>~~ee~~|LATCH<br>_INT_EN<br>~~G~~<br>~~eee~~<br>~~ee~~|INT_RD<br>_CLEAR<br>~~eee~~|FSYNC_INT_L<br>EVEL<br>~~eee~~<br>~~ee~~|FSYNC<br>_INT_MODE_<br>EN<br>~~eee~~<br>~~ee~~|-<br>~~eee~~<br>~~eee~~|-<br>~~eee~~<br>~~eee~~|
|38<br>~~ee~~<br>~~ee~~<br>~~a~~|56<br>~~ee~~<br>~~ee~~|INT_ENABLE<br>~~ee ~~<br>~~ee~~|R/W<br> ~~ee~~<br>~~ee~~|Y<br>~~ee ~~<br>~~ee~~|WOM_INT_EN[2:0]<br> ~~eeeee~~<br>~~ee~~<br>~~ee~~|||FIFO<br>_OFLOW<br>_EN<br>~~eee~~<br>~~ee~~|-<br>~~eee~~<br>~~ee~~<br>~~ee~~|GDRIVE_INT_<br>EN<br>~~eee~~<br>~~ee~~<br>~~ee~~|-<br>~~eee~~<br>~~eee~~<br>~~ee~~|DATA_RDY_I<br>NT_EN<br>~~eee~~<br>~~eee~~<br>~~ee~~|
|3A<br>~~ee~~<br>~~ee~~<br>~~a~~|58<br>~~ee~~<br>~~ee~~|INT_STATUS<br>~~ee ~~<br>~~ee~~|R/C<br> ~~ee~~<br>~~ee~~|N<br>~~ee~~<br>~~ee~~|WOM_INT[2:0]<br>~~ee~~<br>~~ee~~<br>~~ee~~|||FIFO<br>_OFLOW<br>_INT<br>~~ee~~<br>~~ee~~|-<br>~~ee~~<br>~~ee~~<br>~~ee~~|GDRIVE_INT<br>~~ee ~~<br>~~ee~~<br>~~ee~~|-<br> ~~eee~~<br>~~ee~~<br>~~ee~~|DATA<br>_RDY_INT<br>~~eee~~<br>~~ee~~<br>~~ee~~|
|3B<br>~~a~~|59<br>~~a~~|ACCEL_XOUT_H<br>~~eG~~|R<br>~~eG~~|N<br>~~eG~~|ACCEL_XOUT_H[15:8]<br>~~ee~~<br>~~eeee~~||||||||
|3C<br>~~a~~|60<br>~~a~~|ACCEL_XOUT_L<br>~~eG~~|R<br>~~eG~~|N<br>~~eG~~|ACCEL_XOUT_L[7:0]<br>~~ee~~<br>~~ee ee~~||||||||
|3D<br>~~a~~|61<br>~~a~~|ACCEL_YOUT_H<br>~~eG~~|R<br>~~eG~~|N<br>~~eG~~|ACCEL_YOUT_H[15:8]||||||||
|3E<br>~~a ~~<br>~~aa~~<br><br>~~a~~|62<br> ~~a~~<br>~~aa~~<br>~~ee~~<br>|ACCEL_YOUT_L<br>~~eG~~<br>~~aa~~<br>~~ee~~|R<br>~~eG~~<br>~~ee~~|N<br>~~eG~~<br>~~GR~~|ACCEL_YOUT_L[7:0]||||||||
|3F<br>~~a~~<br>~~a~~<br>~~a~~|63<br>~~aee~~<br>~~**a**~~|ACCEL_ZOUT_H<br>~~ee~~<br>~~**e**s~~|R<br>~~ee~~<br>~~rs~~|N<br>~~GR~~<br>~~er~~|ACCEL_ZOUT_H[15:8]||||||||
|40<br>~~a~~<br>~~a ~~<br>~~a~~|64<br>~~aee~~<br> ~~**a**~~|ACCEL_ZOUT_L<br>~~ee~~<br>~~**e**s~~|R<br>~~ee~~<br>~~rs~~|N<br>~~GR~~<br>~~er~~|ACCEL_ZOUT_L[7:0]||||||||
|41<br> <br>~~a~~<br>~~a~~|65<br> ~~**a**~~<br>~~a~~|TEMP_OUT_H<br>~~**e**s~~<br>~~es~~|R<br>~~rs~~<br>~~G~~<br>~~es~~|N<br>~~er~~<br>~~G~~<br>~~re~~|TEMP_OUT[15:8]||||||||
|42<br> <br>~~a~~<br>~~a~~|66<br> ~~**a**~~<br>~~a~~|TEMP_OUT_L<br>~~**e**s~~<br>~~es~~|R<br>~~rs ~~<br>~~G~~<br>~~es~~|N<br> ~~er~~<br>~~G~~<br>~~re~~|TEMP_OUT[7:0]||||||||
|43<br>~~a ~~<br>~~a~~<br>~~a~~|67<br> ~~a~~<br>~~a~~<br>~~a~~|GYRO_XOUT_H<br>~~es ~~<br>~~eG~~<br>~~es~~|R<br> ~~es ~~<br>~~eG~~<br>~~es~~|N<br> ~~re~~<br>~~eG~~<br>~~re~~|GYRO_XOUT[15:8]||||||||
|44<br>~~a~~<br>~~a~~|68<br>~~a~~<br>~~a~~|GYRO_XOUT_L<br>~~eG~~<br>~~es~~|R<br>~~eG~~<br>~~es~~|N<br>~~eG~~<br>~~re~~|GYRO_XOUT[7:0]||||||||
|45<br>~~a ~~<br>~~a~~<br>~~a~~|69<br> ~~a~~<br>~~a~~<br>~~a~~|GYRO_YOUT_H<br>~~es ~~<br>~~eG~~<br>~~es~~|R<br> ~~es ~~<br>~~eG~~<br>~~es~~|N<br> ~~re~~<br>~~eG~~<br>~~re~~|GYRO_YOUT[15:8]||||||||
|46<br>~~a~~<br>~~a~~|70<br>~~a~~<br>~~a~~|GYRO_YOUT_L<br>~~eG~~<br>~~es~~|R<br>~~eG~~<br>~~es~~|N<br>~~eG~~<br>~~re~~|GYRO_YOUT[7:0]||||||||
|47<br>~~a ~~<br>~~a~~<br>~~a~~|71<br> ~~a~~<br>~~a~~|GYRO_ZOUT_H<br>~~es ~~<br>~~eG~~<br>~~es~~|R<br> ~~es ~~<br>~~eG~~<br>~~es~~|N<br> ~~re~~<br>~~eG~~|GYRO_ZOUT[15:8]||||||||
|48<br>~~a~~<br>~~a~~<br>~~a~~|72<br>~~a~~<br>~~a~~|GYRO_ZOUT_L<br>~~eG~~<br>~~es~~|R<br>~~eG~~<br>~~es~~<br>~~ee~~|N<br>~~eG~~<br>~~ee es~~|GYRO_ZOUT[7:0]<br>~~eses~~<br>~~es~~<br>~~es~~||||||||
|68<br>~~a~~<br>~~a~~<br>~~a~~|104<br>~~a~~<br>~~a~~|SIGNAL_PATH_RESET<br>~~es ~~|R/W<br> ~~es~~<br>~~ee~~<br>~~es~~|N<br>~~ee es~~<br>~~es~~|-<br>~~es~~<br>~~es ee~~|-<br>~~es~~<br>~~ee~~|-<br>~~es~~|-<br>~~es~~|-<br>~~es~~|-|ACCEL<br>_RST|TEMP<br>_RST|
|69<br>~~a~~<br>~~a~~<br>~~a~~|105<br>~~a~~<br>~~a~~<br>~~a~~|ACCEL_INTEL_CTRL<br>~~ee~~|R/W<br>~~ee~~<br>~~es~~<br>~~ee~~|N<br>~~ee es~~<br>~~es~~<br>~~ee ee~~|ACCEL_INTE<br>L_EN<br>~~es ~~<br>~~es ee~~<br>~~ee~~|ACCEL_INTEL<br>_MODE<br> ~~es~~<br>~~ee~~<br>~~ee~~|-<br>~~es~~<br>~~es~~<br>~~es~~<br>~~ee~~||||||
|6A<br>~~a~~<br>~~a~~|106<br>~~a~~<br>~~a~~|USER_CTRL<br>~~ee~~|R/W<br>~~es~~<br>~~ee~~|N<br>~~es~~<br>~~ee ee~~|-<br>~~es ee~~<br>~~ee~~|FIFO_EN<br>~~ee~~<br>~~ee~~|-<br>~~es~~|I2C_IF<br>_DIS<br>~~ee~~|-|FIFO<br>_RST|-|SIG_COND<br>_RST|



Page 30 of 53 

Document Number: DS-000409 Revision: 1.0 

## _**IAM-20680HP**_ 

|**Addr**<br>**(Hex)**|**Addr**<br>**(Dec.)**|**Register Name**|**Serial**<br>**I/F**|**Accessible**<br>**(writable)**<br>**in Sleep**<br>**Mode**|**Bit7**|**Bit6**|**Bit5**|**Bit4**|**Bit3**|**Bit2**|**Bit1**|**Bit0**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|6B<br>~~a~~<br>~~a~~|107<br>~~a~~<br>~~a~~|PWR_MGMT_1<br>~~es~~|R/W<br>~~es~~<br>~~es~~|Y<br>~~es~~<br>~~Ge~~|DEVICE_RES<br>ET<br>~~es~~<br>~~rs~~|SLEEP<br>~~es~~<br>~~rs~~|ACCEL_CYCLE<br>~~ee~~<br>~~re~~|GYRO_<br>STANDBY|TEMP_DIS|CLKSEL[2:0]|||
|6C<br>~~a ~~<br>~~a~~|108<br> ~~a~~<br>~~a~~|PWR_MGMT_2<br>~~es~~|R/W<br>~~es~~<br>~~es~~|Y<br>~~es~~<br>~~Ge~~|FIFO_LP_EN<br>~~es ~~<br>~~rs~~|-<br> ~~es ~~<br>~~rs~~|STBY_XA<br> ~~ee~~<br>~~re~~|STBY_YA|STBY_ZA|STBY_XG|STBY_YG|STBY_ZG|
|72<br>~~a ~~<br>~~a~~<br>~~a~~|114<br> ~~a~~|FIFO_COUNTH<br>~~es ~~<br>~~es~~|R<br> ~~es~~<br>~~es~~|N<br>~~Ge~~<br>~~rr~~|-<br>~~rs~~<br>~~rs re~~|||FIFO_COUNT[12:8]|||||
|73<br>~~a~~<br>~~a~~|115|FIFO_COUNTL<br>~~es~~|R<br>~~es~~|N<br>~~rr~~|FIFO_COUNT[7:0]||||||||
|74<br>~~a~~<br>~~a~~|116<br>~~a~~<br>~~ss~~|FIFO_R_W<br>~~es ~~<br>~~ss~~<br>~~ss~~|R/W<br> ~~es ~~<br>~~ss~~<br>~~es~~|N<br> ~~rr~~<br>~~re~~|FIFO_DATA[7:0]||||||||
|75<br>~~a~~|117<br>~~ss~~|WHO_AM_I<br>~~ss~~|R<br>~~es~~|N<br>~~re~~|WHOAMI[7:0]||||||||
|77<br>~~a ~~<br>~~aa~~<br><br>~~a~~|119<br> ~~ss~~<br>~~aa~~<br>~~ss~~<br>|XA_OFFSET_H<br>~~ss~~<br>~~aa~~<br>~~ss~~|R/W<br>~~es ~~<br>~~es~~|N<br> ~~re~~|XA_OFFS [14:7]||||||||
|78<br>~~a~~<br>~~a~~<br>~~a~~|120<br>~~ass~~<br>~~a~~<br>|XA_OFFSET_L<br>~~ss~~<br>~~es~~|R/W<br>~~es~~<br>~~es~~|N<br>~~re~~|XA_OFFS [6:0]|||||||-|
|7A<br><br>~~a ~~<br>~~a~~|122<br>~~ss~~<br> ~~a~~<br>|YA_OFFSET_H<br>~~ss ~~<br>~~es~~|R/W<br> ~~es~~<br>~~es~~|N<br>~~re~~|YA_OFFS [14:7]||||||||
|7B<br> <br>~~a ~~<br>~~a~~|123<br> ~~a~~<br> ~~a~~|YA_OFFSET_L<br>~~es ~~<br>~~Gs~~<br>~~ss~~|R/W<br> ~~es ~~<br>~~Gs~~<br>~~ss~~|N<br> ~~re~~<br>~~rr~~|YA_OFFS [6:0]|||||||-|
|7D<br>~~a~~<br>~~a~~|125<br>~~ss~~|ZA_OFFSET_H<br>~~ss~~<br>~~ss~~|R/W<br>~~ss~~<br>~~es~~|N<br>~~rr~~|ZA_OFFS [14:7]||||||||
|7E<br>~~a~~<br>~~a~~|126<br>~~ss~~|ZA_OFFSET_L<br>~~ss~~<br>~~ss~~|R/W<br>~~ss ~~<br>~~es~~|N<br> ~~rr~~|ZA_OFFS [6:0]|||||||-|



**Table 16. Register Map** 

**Note:** Register Names ending in _H and _L contain the high and low bytes, respectively, of an internal register value. 

In the detailed register tables that follow, register names are in capital letters, while register values are in capital letters and italicized.  For example, the ACCEL_XOUT_H register (Register 59) contains the 8 most significant bits, _ACCEL_XOUT_ [15:8], of the 16bit X-Axis accelerometer measurement, _ACCEL_XOUT_ . 

The reset value is 0x00 for all registers other than the registers below: 

- Self-test registers 0, 1, 2, 13, 14, 15 contain pre-programmed values 

- Register 107, PWR_MGMT_1 

- Register 117, WHO_AM_I: (default value is reported in section 9.31) 

- Registers 119, 120, 122, 123, 125, 126 contain pre-programmed offset cancellation values 

Page 31 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

## _**9 REGISTER DESCRIPTIONS**_ 

This section describes the function and contents of each register within the IAM-20680HP. 

**REGISTERS 0 TO 2 – GYROSCOPE SELF-TEST REGISTERS** 

## **Register Name: SELF_TEST_X_GYRO, SELF_TEST_Y_GYRO, SELF_TEST_Z_GYRO Type: READ/WRITE** 

## **Register Address: 00, 01, 02 (Decimal); 00, 01, 02 (Hex)** 

|**REGISTER**|**BIT**|**NAME**|**FUNCTION**|
|---|---|---|---|
|SELF_TEST_X_GYRO|[7:0]|XG_ST_DATA[7:0]|The value in this register indicates the self-test output generated during<br>manufacturing tests. This value is to be used to check against<br>subsequent self-test outputsperformed bythe end user.|
|SELF_TEST_Y_GYRO|[7:0]|YG_ST_DATA[7:0]|The value in this register indicates the self-test output generated during<br>manufacturing tests. This value is to be used to check against<br>subsequent self-test outputsperformed bythe end user.|
|SELF_TEST_Z_GYRO|[7:0]|ZG_ST_DATA[7:0]|The value in this register indicates the self-test output generated during<br>manufacturing tests. This value is to be used to check against<br>subsequent self-test outputsperformed bythe end user.|



The equation to convert self-test codes in OTP to factory self-test measurement is: 

_ST_  OTP_ = (2620 / 2 _FS_ ) *.101( _ST_  code_ − 1) (lsb) 

where ST_OTP is the value that is stored in OTP of the device, FS is the Full Scale value, and ST_code is based on the Self-Test value (ST_ FAC) determined in InvenSense’s factory final test and calculated based on the following equation: 

log( _ST_  FAC_ /(2620 / 2 _FS_ )) _ST_  code_ = _round_ ( ) + 1 log(.101) 

## **REGISTERS 13 TO 15 – ACCELEROMETER SELF-TEST REGISTERS** 

## **Register Name: SELF_TEST_X_ACCEL, SELF_TEST_Y_ACCEL, SELF_TEST_Z_ACCEL Type: READ/WRITE** 

## **Register Address: 13, 14, 15 (Decimal); 0D, 0E, 0F (Hex)** 

|**REGISTER**|**BITS**|**NAME**|**FUNCTION**|
|---|---|---|---|
|SELF_TEST_X_ACCEL|[7:0]|XA_ST_DATA[7:0]|The value in this register indicates the self-test output generated<br>during manufacturing tests. This value is to be used to check against<br>subsequent self-test outputsperformed bythe end user.|
|SELF_TEST_Y_ACCEL|[7:0]|YA_ST_DATA[7:0]|The value in this register indicates the self-test output generated<br>during manufacturing tests. This value is to be used to check against<br>subsequent self-test outputsperformed bythe end user.|
|SELF_TEST_Z_ACCEL|[7:0]|ZA_ST_DATA[7:0]|The value in this register indicates the self-test output generated<br>during manufacturing tests. This value is to be used to check against<br>subsequent self-test outputsperformed bythe end user.|



The equation to convert self-test codes in OTP to factory self-test measurement is: 

_ST_  OTP_ = (2620 / 2 _FS_ ) *.101( _ST_  code_ − 1) (lsb) 

where ST_OTP is the value that is stored in OTP of the device, FS is the Full Scale value, and ST_code is based on the Self-Test value (ST_ FAC) determined in InvenSense’s factory final test and calculated based on the following equation: 

**==> picture [256 x 30] intentionally omitted <==**

## **REGISTER 19 – GYRO OFFSET ADJUSTMENT REGISTER** 

## **Register Name: XG_OFFS_USRH** 

Page 32 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

**Register Type: READ/WRITE Register Address: 19 (Decimal); 13 (Hex)** 

**BIT NAME FUNCTION** Bits 15 to 8 of the 16-bit offset of X gyroscope (2’s complement). This register is [7:0] X_OFFS_USR[15:8] used to remove DC bias from the sensor output. The value in this register is added to the gyroscope sensor value before going into the sensor register. ~~a~~ **REGISTER 20 – GYRO OFFSET ADJUSTMENT REGISTER** 

## **REGISTER 20 – GYRO OFFSET ADJUSTMENT REGISTER** 

**Register Name: XG_OFFS_USRL** 

**Register Type: READ/WRITE** 

**Register Address: 20 (Decimal); 14 (Hex)** 

|**BIT**|**NAME**|**FUNCTION**|
|---|---|---|
|[7:0]|X_OFFS_USR[7:0]|Bits 7 to 0 of the 16-bit offset of X gyroscope (2’s complement). This register is<br>used to remove DC bias from the sensor output. The value in this register is<br>added to thegyroscope sensor value beforegoinginto the sensor register.|



## **REGISTER 21 – GYRO OFFSET ADJUSTMENT REGISTER** 

**Register Name: YG_OFFS_USRH** 

**Register Type: READ/WRITE Register Address: 21 (Decimal); 15 (Hex) BIT NAME FUNCTION** Bits 15 to 8 of the 16-bit offset of Y gyroscope (2’s complement). This register is [7:0] Y_OFFS_USR[15:8] used to remove DC bias from the sensor output. The value in this register is added to the gyroscope sensor value before going into the sensor register. ~~a~~ **REGISTER 22 – GYRO OFFSET ADJUSTMENT REGISTER** 

## **REGISTER 22 – GYRO OFFSET ADJUSTMENT REGISTER** 

**Register Name: YG_OFFS_USRL** 

**Register Type: READ/WRITE Register Address: 22 (Decimal); 16 (Hex) BIT NAME FUNCTION** Bits 7 to 0 of the 16-bit offset of Y gyroscope (2’s complement). This register is [7:0] Y_OFFS_USR[7:0] used to remove DC bias from the sensor output. The value in this register is added to the gyroscope sensor value before going into the sensor register. ~~a~~ 

Page 33 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

## **REGISTER 23 – GYRO OFFSET ADJUSTMENT REGISTER** 

**Register Name: ZG_OFFS_USRH** 

## **Register Type: READ/WRITE** 

## **Register Address: 23 (Decimal); 17 (Hex)** 

|**BIT**|**NAME**|**FUNCTION**|
|---|---|---|
|[7:0]|Z_OFFS_USR[15:8]|Bits 15 to 8 of the 16-bit offset of Z gyroscope (2’s complement). This register is<br>used to remove DC bias from the sensor output. The value in this register is<br>added to thegyroscope sensor value beforegoinginto the sensor register.|



## **REGISTER 24 – GYRO OFFSET ADJUSTMENT REGISTER** 

## **Register Name: ZG_OFFS_USRL** 

**Register Type: READ/WRITE** 

## **Register Address: 24 (Decimal); 18 (Hex)** 

|**BIT**|**NAME**|**FUNCTION**|
|---|---|---|
|[7:0]|Z_OFFS_USR[7:0]|Bits 7 to 0 of the 16-bit offset of Z gyroscope (2’s complement). This register is<br>used to remove DC bias from the sensor output.  The value in this register is<br>added to thegyroscope sensor value beforegoinginto the sensor register.|



## **REGISTER 25 – SAMPLE RATE DIVIDER** 

## **Register Name: SMPLRT_DIV** 

**Register Type: READ/WRITE** 

## **Register Address: 25 (Decimal); 19 (Hex)** 

|**BIT**|**NAME**|**FUNCTION**|
|---|---|---|
|[7:0]|SMPLRT_DIV[7:0]|Divides the internal sample rate (see register CONFIG) to generate the sample rate that<br>controls sensor data output rate, FIFO sample rate.<br>**Note**: This register is only effective when FCHOICE_B register bits are 2’b00, and (0 < DLPF_CFG < 7).<br>This is the update rate of the sensor register:<br>SAMPLE_RATE = INTERNAL_SAMPLE_RATE / (1 + SMPLRT_DIV)<br>Where INTERNAL_SAMPLE_RATE = 1 kHz|



## 9.10 **REGISTER 26 – CONFIGURATION** 

## **Register Name: CONFIG** 

## **Register Type: READ/WRITE** 

**Register Address: 26 (Decimal); 1A (Hex)** 

|**BIT**<br>~~a a~~|**NAME**<br>~~a~~|**FUNCTION**|
|---|---|---|
|[7]<br>~~a a~~|-<br>~~a~~|Always set to 0|
|[6]|FIFO_MODE|When set to ‘1’, when the FIFO is full, additional writes will not be written to FIFO.<br>When set to ‘0’, when the FIFO is full, additional writes will be written to the FIFO, replacing<br>the oldest data.|
|[5:3]|EXT_SYNC_SET[2:0]|Enables the FSYNCpin data to be sampled.<br>**EXT_SYNC_SET**<br>**FSYNC bit location**<br>0<br>function disabled<br>1<br>TEMP_OUT_L[0]<br>2<br>GYRO_XOUT_L[0]<br>3<br>GYRO_YOUT_L[0]<br>4<br>GYRO_ZOUT_L[0]<br>5<br>ACCEL_XOUT_L[0]<br>6<br>ACCEL_YOUT_L[0]<br>7<br>ACCEL_ZOUT_L[0]<br>FSYNC will be latched to capture short strobes. This will be done such that if FSYNC toggles,<br>the latched value toggles, but won’t toggle again until the new latched value is captured by<br>the sample rate strobe.|
|[2:0]|DLPF_CFG[2:0]|For the DLPF to be used, FCHOICE_B[1:0] is 2’b00.<br>See Table 17.|



Page 34 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

The DLPF is configured by _DLPF_CFG,_ when _FCHOICE_B_ [1:0] = 2b’00. The gyroscope and temperature sensor are filtered according to the value of _DLPF_CFG_ and _FCHOICE_B_ as shown in Table 17. 

|**FCHOICE_B**|**FCHOICE_B**|**DLPF_CFG**<br>~~es~~|**Gyroscope**|**Gyroscope**|**Gyroscope**|**Temperature**<br>**Sensor**|
|---|---|---|---|---|---|---|
|**<1>**<br>~~es~~|**<0>**<br>~~es es~~||**3-dB BW**<br>**(Hz)**<br>~~rs es~~|**Noise BW**<br>**(Hz)**<br>~~es~~|**Rate**<br>**(kHz)**|**3-dB BW (Hz)**|
|X<br>~~es~~<br>~~ee~~|1<br>~~es es~~<br>|X<br>~~es~~<br>~~Ge~~<br>|8173<br>~~rs es~~<br>~~rs~~|8595.1<br>~~es~~<br>~~Q~~|32|4000|
|1<br>~~es ~~<br>~~es~~<br>~~ee~~<br>~~ee~~|0<br> ~~es es~~<br>~~es~~<br>~~**rsGr**~~<br>|X<br>~~es ~~<br>~~es~~<br>~~Ge~~<br>~~**rsGr**~~<br>|3281<br> ~~rs es~~<br>~~es~~<br>~~rs~~<br>|3451.0<br>~~es~~<br>~~es~~<br>~~Q~~<br>|32<br>~~es~~<br>|4000<br>~~es~~<br>|
|0<br>~~ee~~<br>~~ee~~|0<br>~~**rsGr**~~<br>|0<br>~~Ge~~<br>~~**rsGr**~~<br>|250<br>~~rs~~<br>|306.6<br>~~Q~~<br>|8<br>|4000<br>|
|0<br>~~ee ~~<br>~~ee~~<br>~~es~~|0<br> ~~**rsGr**~~<br>|1<br>~~Ge~~<br>~~**rsGr**~~<br><br>~~rs~~|176<br>~~rs~~<br><br>~~r~~~~**s**~~|177.0<br>~~Q~~<br>|1<br>|188<br>|
|0<br> <br>~~eees~~<br>~~es~~|0<br> ~~**rsGr**~~<br>~~es~~<br>~~es~~|2<br>~~**rsGr**~~<br>~~es~~<br>~~rs~~<br>~~ees~~|92<br>~~es~~<br>~~r~~~~**s**~~<br>~~e~~|108.6<br>~~es~~|1<br>~~es~~|98<br>~~es~~|
|0<br>~~es~~<br>~~es~~|0<br>~~es~~<br>~~es~~|3<br>~~rs~~<br>~~ees~~<br>~~Ge~~<br>|41<br>~~r~~~~**s**~~<br>~~e~~<br>~~rs~~<br>|59.0<br>~~Q~~<br>|1|42|
|0<br>~~es~~<br>~~es~~<br>~~es~~|0<br>~~es ~~<br>~~es~~<br>~~es~~|4<br>~~rs ~~<br> ~~ees ~~<br>~~es~~<br>~~Ge~~<br>|20<br> ~~r~~~~**s**~~<br> ~~e~~<br>~~es~~<br>~~rs~~<br>|30.5<br>~~es~~<br>~~Q~~<br>|1<br>~~es~~|20<br>~~es~~|
|0<br>~~es~~<br>~~es~~<br>~~ee~~|0<br>~~es~~<br>~~es~~<br>|5<br>~~Ge~~<br>~~GG~~<br>~~es~~<br>|10<br>~~rs~~<br>~~GG~~<br>~~Gs~~|15.6<br>~~Q~~<br>~~GG~~|1|10|
|0<br><br>~~es~~<br>~~ee~~|0<br><br>~~es~~<br>~~es~~|6<br>~~GG~~<br>~~es~~<br>~~es~~|5<br>~~GG~~<br>~~Gs~~<br>~~rs~~|8.0<br>~~GG~~<br>~~es~~|1|5|
|0<br><br>~~es~~<br>~~ee~~|0<br><br>~~es~~<br>~~es~~|7<br>~~GG~~<br>~~es~~<br>~~es~~|3281<br>~~GG~~<br>~~Gs~~<br>~~rs~~|3451.0<br>~~GG~~<br>~~es~~|8|4000|



**Table 17. Configuration** 

## **REGISTER 27 – GYROSCOPE CONFIGURATION** 

## **Register Name: GYRO_CONFIG Register Type: READ/WRITE** 

## **Register Address: 27 (Decimal); 1B (Hex)** 

|**BIT**|**NAME**|**FUNCTION**|
|---|---|---|
|[7]|XG_ST|X Gyro self-test|
|[6]|YG_ST|Y Gyro self-test|
|[5]|ZG_ST|Z Gyro self-test|
|[4:3]|FS_SEL[1:0]|Gyro Full Scale Select:<br>00 = ±250 dps<br>01= ±500 dps<br>10 = ±1000 dps<br>11 = ±2000 dps|
|[2]|-|Reserved|
|[1:0]|FCHOICE_B[1:0]|Used to bypass DLPF as shown in Table 17 above.|



## **REGISTER 28 – ACCELEROMETER CONFIGURATION** 

## **Register Name: ACCEL_CONFIG** 

## **Register Type: READ/WRITE Register Address: 28 (Decimal); 1C (Hex)** 

|**BIT**|**NAME**|**FUNCTION**|
|---|---|---|
|[7]|XA_ST|X Accel self-test|
|[6]|YA_ST|Y Accel self-test|
|[5]|ZA_ST|Z Accel self-test|
|[4:3]|ACCEL_FS_SEL[1:0]|Accel Full Scale Select:<br>±2g (00),±4g (01),±8g (10),±16g (11)|
|[2:0]|-|Reserved|



Page 35 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

## **REGISTER 29 – ACCELEROMETER CONFIGURATION 2** 

## **Register Name: ACCEL_CONFIG2** 

## **Register Type: READ/WRITE** 

## **Register Address: 29 (Decimal); 1D (Hex)** 

|**BIT**|**NAME**|**FUNCTION**|
|---|---|---|
|[7:6]|FIFO_SIZE[1:0]|Specifies FIFO size according to the following:<br>0 = 512 Byte<br>1 = 1 kByte<br>2 = 2 kByte<br>3 = 4 kByte|
|[5:4]|DEC2_CFG[1:0]|Averaging filter settings for Low Power Accelerometer mode:<br>0 = Average 4 samples<br>1 = Average 8 samples<br>2 = Average 16 samples<br>3 = Average 32 samples|
|[3]|ACCEL_FCHOICE_B|Used to bypass DLPF as shown in the table below.|
|[2:0]|A_DLPF_CFG|Accelerometer lowpass filter settingas shown in the table below.|



|**ACCEL_FCHOICE_B**<br>~~a~~|**A_DLPF_CFG**<br>~~ee~~<br>~~ee~~|**Accelerometer**<br>~~eeeee~~|**Accelerometer**<br>~~eeeee~~|**Accelerometer**<br>~~eeeee~~|
|---|---|---|---|---|
|||**3-dB BW**<br>**(Hz)**<br>~~eeeee~~<br>~~es ee~~|**Noise BW**<br>**(Hz)**<br>~~eee~~<br>~~ee~~|**Rate**<br>**(kHz)**<br>~~eee~~|
|1<br>~~a~~<br>~~es~~|X<br>~~ee~~<br>~~es~~<br>~~ee~~<br>~~ee~~|1046.0<br>~~ee~~<br>~~es~~<br>~~es ee~~<br>~~es~~|1100.0<br><br>~~es~~<br>~~ee~~<br>~~ee~~|4<br><br>~~es~~|
|0<br>~~es~~<br>~~es~~|0<br>~~es~~<br>~~ee ~~<br>~~es~~<br>~~ee~~<br>~~ee~~|218.1<br>~~es~~<br> ~~es ee~~<br>~~es~~<br>~~es~~<br>~~es~~|235.0<br>~~es~~<br>~~ee~~<br>~~es~~<br>~~ee~~<br>~~es~~|1<br>~~es~~<br>~~es~~|
|0<br>~~es~~<br>~~es~~|1<br>~~es~~<br>~~ee~~<br>~~es~~<br>~~ee~~<br>~~es~~|218.1<br>~~es~~<br>~~es ~~<br>~~es~~<br>~~es~~|235.0<br>~~es~~<br> ~~ee~~<br>~~es~~<br>~~es~~|1<br>~~es~~<br>~~es~~|
|0<br>~~es~~|2<br>~~ee ~~<br>~~es~~<br>~~es~~<br>~~errs es~~|99.0<br> ~~es~~<br>~~es~~<br>~~es~~|121.3<br>~~es~~<br>~~es~~<br>~~es~~|1<br>~~es~~|
|0<br>~~es~~|3<br>~~es~~<br>~~es~~<br>~~errs es~~<br>~~ee~~|44.8<br>~~es~~<br>~~es~~<br>~~es~~|61.5<br>~~es~~<br>~~es~~<br>~~ee~~|1<br>~~es~~|
|0<br>~~es~~<br>~~es~~|4<br>~~es~~<br>~~errs es~~<br>~~es~~<br>~~ee~~<br>~~eee~~|21.2<br>~~es~~<br>~~es~~<br>~~es~~<br>~~es~~<br>~~es~~|31.0<br>~~es~~<br>~~es~~<br>~~es~~<br>~~ee~~<br>~~es~~|1<br>~~es~~<br>~~es~~|
|0<br>~~es~~<br>~~es~~|5<br>~~es~~<br>~~ee~~<br>~~es~~<br>~~eee~~<br>~~ee es~~|10.2<br>~~es~~<br>~~es ~~<br>~~es~~<br>~~es~~<br>~~es~~|15.5<br>~~es~~<br> ~~ee~~<br>~~es~~<br>~~es~~|1<br>~~es~~<br>~~es~~|
|0<br>~~es~~<br>~~es~~|6<br>~~es~~<br>~~eee~~<br>~~es~~<br>~~ee es~~<br>~~rs~~|5.1<br>~~es~~<br>~~es ~~<br>~~es~~<br>~~es~~<br>~~se~~|7.8<br>~~es~~<br> ~~es~~<br>~~es~~<br>~~se~~|1<br>~~es~~<br>~~es~~|
|0<br>~~rs~~|7<br>~~ee es~~<br>~~rs~~<br>~~rs~~|420.0<br>~~es~~<br>~~rs~~<br>~~se~~|441.6<br>~~rs~~<br>~~se~~|1<br>~~rs~~|



**Table 18. Accelerometer Data Rates and Bandwidths (Low Noise Mode)** 

The data output rate of the DLPF filter block can be further reduced by a factor of 1/(1+SMPLRT_DIV), where SMPLRT_DIV is an 8-bit integer. Following is a small subset of ODRs that are configurable for the accelerometer in the low-noise mode in this manner (Hz): 

## 3.91, 7.81, 15.63, 31.25, 62.50, 125, 250, 500, 1K. 

The Table 19 lists the accelerometer filter bandwidths, noise, and current consumption available in the low-power mode of operation. In the low-power mode of operation, the accelerometer is duty-cycled. 

To operate in accelerometer low-power mode, ACCEL_CYCLE should be set to ‘1’ in PWR_MGMT_1 (address 0x6B). 

Page 36 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

|||~~Gs~~|||||
|---|---|---|---|---|---|---|
|**ACCEL_FCHOICE_B **<br>~~rs~~||1<br>~~rs~~<br>~~Gs~~<br>~~rs~~|0<br>~~rs~~|0<br>~~rs~~|0<br>~~rs~~|0<br>~~rs~~|
|**A_DLPF_CFG**<br>~~rs~~||x<br>~~Gs~~<br>~~rs~~<br>~~rs~~<br>~~rs~~|7<br>~~rs~~<br>~~Gs~~|7<br>~~rs~~|7<br>~~rs~~|7<br>~~rs~~|
|**DEC2_CFG**<br>~~Bs~~||x<br>~~rs~~<br>~~Bs~~<br>~~rs~~<br>~~rs~~|0<br>~~Bs~~<br>~~Gs~~|1<br>~~Bs~~|2<br>~~Bs~~|3<br>~~Bs~~|
|**Averages**<br>~~es~~||1x<br>~~rs~~<br>~~es~~<br>~~rs~~<br>~~rs~~|4x<br>~~Gs~~<br>~~es~~|8x<br>~~es~~|16x<br>~~es~~|32x<br>~~es~~|
|**Ton(ms)**<br>~~rs~~||1.084<br>~~rs~~<br>~~rs~~<br>~~rs~~<br>~~rs~~|1.84<br>~~rs~~<br>~~er~~|2.84<br>~~rs~~|4.84<br>~~rs~~|8.84<br>~~rs~~|
|**Noise BW(Hz)**<br>~~ers~~||1100.0<br>~~rs~~<br>~~ers~~<br>~~rs~~|441.6<br>~~ers~~<br>~~er~~<br>~~Gs~~|235.4<br>~~ers~~<br>~~Gs~~|121.3<br>~~ers~~|61.5<br>~~ers~~|
|**Noise(mg-rms) TYP**<br>~~es~~<br>~~rr~~||6.6<br>~~rs ~~<br>~~es~~|4.2<br> ~~er~~<br>~~es~~<br>~~Gs~~|3.1<br>~~es~~<br>~~Gs~~|2.2<br>~~es~~|1.6<br>~~es~~|
|**SMPLRT_DIV**<br>~~es~~|**ODR(Hz)**<br>~~es~~<br>~~rr~~<br>~~rs~~|**Current Consumption(µA) TYP**<br>~~Gs~~<br>~~es~~<br>~~rs~~|||||
|255<br>~~rs~~|3.9<br>~~rr~~<br>~~rs~~<br>~~rs~~<br>~~rs~~|8.4<br>~~rs~~<br>~~rs~~<br>~~Gs~~|9.4<br>~~rs~~<br>~~rs~~<br>~~Gs~~|10.8<br>~~rs~~|13.6<br>~~rs~~|19.2<br>~~rs~~|
|127<br>~~re~~|7.8<br>~~rs ~~<br>~~re~~<br>~~rs~~<br>~~res~~|9.8<br> ~~rs~~<br>~~re~~<br>~~Gs~~<br>~~rs~~|11.9<br>~~rs~~<br>~~re~~<br>~~Gs~~|14.7<br>~~re~~|20.3<br>~~re~~|31.4<br>~~re~~|
|63<br>~~es~~|15.6<br>~~rs~~<br>~~es~~<br>~~res~~<br>~~ee~~|12.8<br>~~Gs~~<br>~~es~~<br>~~rs~~<br>~~ss~~|17.0<br>~~Gs~~<br>~~es~~<br>~~ss~~|22.5<br>~~es~~|33.7<br>~~es~~|55.9<br>~~es~~|
|31<br>~~rs~~|31.3<br>~~res ~~<br>~~rs~~<br>~~ee~~<br>~~errs~~|18.7<br> ~~rs~~<br>~~rs~~<br>~~ss~~<br>~~rs~~|27.1<br>~~rs~~<br>~~ss~~<br>~~Gs~~|38.2<br>~~rs~~|60.4<br>~~rs~~|104.9<br>~~rs~~|
|15<br>~~rs~~|62.5<br>~~ee ~~<br>~~rs~~<br>~~errs~~<br>~~er~~|30.4<br> ~~ss~~<br>~~rs~~<br>~~rs~~<br>~~ee~~|47.2<br>~~ss~~<br>~~rs~~<br>~~Gs~~|69.4<br>~~rs~~|113.9<br>~~rs~~|202.8<br>~~rs~~|
|7<br>~~es~~|125.0<br>~~errs~~<br>~~es~~<br>~~er~~<br>~~es ee~~|57.4<br>~~rs~~<br>~~es~~<br>~~ee~~<br>~~ee~~|87.5<br>~~Gs~~<br>~~es~~|132.0<br>~~es~~|220.9<br>~~es~~|N/A|
|3<br>~~es~~|250.0<br>~~er~~<br>~~es~~<br>~~es ee~~<br>~~es~~|100.9<br>~~ee~~<br>~~es~~<br>~~ee~~<br>~~ee~~|168.1<br>~~es~~|257.0<br>~~es~~|N/A||
|1<br>~~ee~~|500.0<br>~~es ee~~<br>~~ee~~<br>~~es~~|194.9<br>~~ee~~<br>~~ee~~<br>~~ee~~|329.3<br>~~ee~~|N/A|||



**Table 19. Accelerometer Filter Bandwidths, Noise, and Current Consumption (Low-Power Mode)** 

**REGISTER 30 – LOW POWER MODE CONFIGURATION** 

## **Register Name: LP_MODE_CFG** 

## **Register Type: READ/WRITE Register Address: 30 (Decimal); 1E (Hex)** 

|**BIT**|**NAME**|**FUNCTION**|
|---|---|---|
|[7]|GYRO_CYCLE|When set to ‘1’ low-powergyroscope mode is enabled. Default settingis ‘0’|
|[6:4]|G_AVGCFG[2:0]|Averaging filter configuration for low-power gyroscope mode. Default<br>setting is ‘000’|
|[3:0]|LP_MOD_CTRL [3:0]|Controls the clock in low-power mode. Only change as instructed in section<br>5.1.|



To operate in gyroscope low-power mode or 6-axis low-power mode, GYRO_CYCLE should be set to ‘1.’ Gyroscope filter configuration is determined by G_AVGCFG[2:0] that sets the averaging filter configuration. It is not dependent on DLPF_CFG[2:0]. 

Table 20 shows some example configurations for gyroscope low-power mode. 

Page 37 of 53 

Document Number: DS-000409 Revision: 1.0 

## _**IAM-20680HP**_ 

|**FCHOICE_B **<br>~~rs re~~|**FCHOICE_B **<br>~~rs re~~|0<br>~~re~~|0<br>~~rr~~|0<br>~~rs~~|0<br>~~fs~~|0<br>~~fs~~|0<br>~~QO~~|0|0|
|---|---|---|---|---|---|---|---|---|---|
|**G_AVGCFG**<br>~~rs re~~<br>~~Bs~~||0<br>~~re~~<br>~~rr~~|1<br>~~rr~~<br>~~rs~~|2<br>~~rs~~<br>~~Gs~~|3<br>~~fs~~<br>~~(er~~|4<br>~~fs~~|5<br>~~QO~~|6|7|
|**Averages**<br>~~rs re~~<br>~~Bs~~||1x<br>~~re ~~<br>~~rr~~|2x<br> ~~rr ~~<br>~~rs~~|4x<br> ~~rs ~~<br>~~Gs~~|8x<br> ~~fs~~<br>~~(er~~|16x<br>~~fs~~|32x<br>~~QO~~|64x|128x|
|**Ton(ms)**<br>~~Bs ~~||1.73<br> ~~rr~~|2.23<br>~~rs~~|3.23<br>~~Gs~~|5.23<br>~~(er~~|9.23|17.23|33.23|65.23|
|**Noise BW(Hz)**||650.8|407.1|224.2|117.4|60.2|30.6|15.6|8.0|
|**Noise(dps-rms) TYP**<br>~~ee~~||0.20<br>~~ee~~|0.16|0.12|0.09|0.06|0.04|0.03|0.02|
|**SMPLRT_DIV**<br>~~ee~~<br>~~rs~~|**ODR(Hz)**<br>~~ee~~<br>~~ee~~<br>~~rs~~|**Current Consumption(mA) TYP**<br>~~ee~~<br>~~rs~~<br>~~reQsQf~~||||||||
|255<br>~~rs~~|3.9<br>~~ee~~<br>~~rs~~|1.3<br>~~ee~~<br>~~rs~~|1.3<br>~~re~~|1.3<br>~~Qs~~|1.3<br>~~Qf~~|1.4<br>~~Qf~~|1.4|1.5|1.8|
|99<br>~~rs~~<br>~~PO~~|10.0<br>~~rs~~<br>~~PO~~|1.3<br>~~rs~~<br>~~PO~~|1.3<br>~~re~~<br>~~PO~~|1.4<br>~~Qs~~<br>~~PO~~|1.4<br>~~Qf~~<br>~~PO~~|1.5<br>~~Qf~~<br>~~PO~~|1.6<br>~~PO~~|1.9<br>~~PO~~|2.5<br>~~PO~~|
|64<br>~~ss~~<br>~~rs~~|15.4<br>~~ss~~<br>~~es~~|1.4<br>~~Ge re~~|1.4<br>~~GQ~~<br>~~re~~|1.4<br>~~GQ~~|1.5<br>~~GQ~~|1.6<br>~~GQ~~|1.8|2.2|N/A|
|32<br>~~rs~~<br>~~re es~~|30.3<br>~~es~~<br>~~es~~|1.4<br>~~Ge re~~<br>~~es~~|1.4<br>~~re~~<br>~~re~~|1.5|1.6|1.8|2.2|N/A||
|19<br>~~rs~~<br>~~re es~~<br>~~rr~~|50.0<br>~~es~~<br>~~es~~<br>~~rs~~|1.5<br>~~Ge re~~<br>~~es~~<br>~~rs rs~~|1.5<br>~~re~~<br>~~re~~<br>~~rs~~|1.6<br>~~es~~|1.8|2.1|2.8|||
|9<br>~~re es~~<br>~~rr~~<br>~~es~~|100.0<br>~~es~~<br>~~rs~~<br>~~ees ee~~|1.6<br>~~es ~~<br>~~rs rs~~<br>~~ee~~|1.7<br> ~~re~~<br>~~rs~~|1.9<br>~~es~~|2.2|3.0|N/A|||
|7<br>~~rr~~<br>~~es~~|125.0<br>~~rs ~~<br>~~ees ee~~<br>~~ee~~|1.7<br> ~~rs rs~~<br>~~ee~~<br>~~ee~~|1.8<br>~~rs ~~<br>~~ee~~|2.0<br> ~~es~~|2.5|N/A||||
|4<br>~~es ~~<br>~~ee~~|200.0<br> ~~ees ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|1.9<br>~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|2.1<br>~~ee~~<br>~~ee~~<br>~~ee~~|2.5<br>~~ee~~|N/A|||||
|3<br>~~ee~~|250.0<br>~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|2.1<br> ~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|2.3<br>~~ee~~<br>~~ee~~<br>~~ee~~|2.7<br>~~ee~~||||||
|2<br>~~ee~~|333.3<br>~~ee ~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|2.3<br> ~~ee~~<br>~~ee~~<br>~~ee~~<br>~~ee~~|2.6<br>~~ee~~<br>~~ee~~<br>~~ee~~|N/A||||||
|1<br>~~ee~~|500.0<br>~~ee ~~<br>~~ee~~<br>~~ee~~|2.9<br> ~~ee~~<br>~~ee~~<br>~~ee~~|N/A<br>~~ee~~|||||||



**Table 20. Example Configurations for Gyroscope Low-Power Mode** 

**REGISTER 31 – WAKE-ON MOTION THRESHOLD (ACCELEROMETER)** 

|**REGISTER 31 – WAKE-ON MOTION THRESHOLD (ACCELEROMETER)**|**REGISTER 31 – WAKE-ON MOTION THRESHOLD (ACCELEROMETER)**|**REGISTER 31 – WAKE-ON MOTION THRESHOLD (ACCELEROMETER)**|**REGISTER 31 – WAKE-ON MOTION THRESHOLD (ACCELEROMETER)**|**REGISTER 31 – WAKE-ON MOTION THRESHOLD (ACCELEROMETER)**|
|---|---|---|---|---|
|**Register Name: ACCEL_WOM_THR**|||||
|**Register Type: READ/WRITE**|||||
|**Register Address: 31 (Decimal); 1F (Hex)**||||**Register Address: 31 (Decimal); 1F (Hex)**|
||**BIT**<br>**NAME**|||**FUNCTION**|
||[7:0]<br>WOM_THR[7:0]|||This register holds the threshold value for the Wake on Motion Interrupt for accelerometer.<br>Wake on motion threshold resolution is 4 mg/LSB regardless the selected full scale.|



Page 38 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

## 9.16 **REGISTER 35 – FIFO ENABLE** 

## **Register Name: FIFO_EN** 

## **Register Type: READ/WRITE** 

## **Register Address: 35 (Decimal); 23 (Hex)** 

|**BIT**|**NAME**|**FUNCTION**|
|---|---|---|
|[7]|TEMP_FIFO_EN|1 – Write TEMP_OUT_H and TEMP_OUT_L to the FIFO at the sample rate; If enabled,<br>buffering of data occurs even if data path is in standby.<br>0 – Function is disabled.|
|[6]|XG_FIFO_EN|1 – Write GYRO_XOUT_H and GYRO_XOUT_L to the FIFO at the sample rate; If enabled,<br>buffering of data occurs even if data path is in standby.<br>0 – Function is disabled.|
|[5]|YG_FIFO_EN|1 – Write GYRO_YOUT_H and GYRO_YOUT_L to the FIFO at the sample rate; If enabled,<br>buffering of data occurs even if data path is in standby.<br>0 – Function is disabled.<br>**Note**: Enabling any one of the bits corresponding to the Gyros or Temp data paths, data are buffered into<br>the FIFO even though that datapath is not enabled.|
|[4]|ZG_FIFO_EN|1 – Write GYRO_ZOUT_H and GYRO_ZOUT_L to the FIFO at the sample rate; If enabled,<br>buffering of data occurs even if data path is in standby.<br>0 – Function is disabled|
|[3]|ACCEL_FIFO_EN|1 – Write ACCEL_XOUT_H, ACCEL_XOUT_L, ACCEL_YOUT_H, ACCEL_YOUT_L, ACCEL_ZOUT_H,<br>and ACCEL_ZOUT_L to the FIFO at the sample rate;<br>0 – Function is disabled.|
|[2:0]|-|Reserved.|



## **REGISTER 54 – FSYNC INTERRUPT STATUS** 

## **Register Name: FSYNC_INT** 

**Register Type: READ to CLEAR** 

**Register Address: 54 (Decimal); 36 (Hex)** 

|**BIT**|**NAME**|**FUNCTION**|
|---|---|---|
|[7]|FSYNC_INT|This bit automatically sets to 1 when a FSYNC interrupt has been generated. The bit<br>clears to 0 after the register has been read.|



## **REGISTER 55 – INT PIN / BYPASS ENABLE CONFIGURATION** 

## **Register Name: INT_PIN_CFG** 

## **Register Type: READ/WRITE** 

## **Register Address: 55 (Decimal); 37 (Hex)** 

|**BIT**|**NAME**|**FUNCTION**|
|---|---|---|
|[7]|INT_LEVEL|1 – The logic level for INT pin is active low.<br>0 – The logic level for INTpin is active high.|
|[6]|INT_OPEN|1 – INT pin is configured as open drain.<br>0 – INTpin is configured aspush-pull.|
|[5]|LATCH_INT_EN|1 – INT pin level held until interrupt status is cleared.<br>0 – INTpin indicates interruptpulse’s width is 50µs.|
|[4]|INT_RD_CLEAR|1 – Interrupt status is cleared if any read operation is performed.<br>0 – Interrupt status is cleared onlybyreadingINT_STATUS register|
|[3]|FSYNC_INT_LEVEL|1 – The logic level for the FSYNC pin as an interrupt is active low.<br>0 – The logic level for the FSYNCpin as an interrupt is active high.|
|[2]|FSYNC_INT_MODE_EN|When this bit is equal to 1, the FSYNC pin will trigger an interrupt when it transitions to<br>the level specified by F_SYNC_INT_LEVEL_. When this bit is equal to 0, the FSYNC pin is<br>disabled from causingan interrupt.|
|[1]|-|Reserved.|
|[0]|-|Always set to 0.|



Page 39 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

## **REGISTER 56 – INTERRUPT ENABLE** 

## **Register Name: INT_ENABLE** 

## **Register Type: READ/WRITE** 

## **Register Address: 56 (Decimal); 38 (Hex)** 

|**BIT**|**NAME**|**FUNCTION**|
|---|---|---|
|[7:5]|WOM_INT_EN[2:0]|111 – Enable WoM interrupt on accelerometer.<br>000 – Disable WoM interrupt on accelerometer.|
|[4]|FIFO_OFLOW_EN|1 – Enables a FIFO buffer overflow to generate an interrupt.<br>0 – Function is disabled.|
|[3]|-|Reserved.|
|[2]|GDRIVE_INT_EN|Gyroscope Drive System Readyinterrupt enable.|
|[1]|-|Reserved.|
|[0]|DATA_RDY_INT_EN|Data readyinterrupt enable.|



## 9.20 **REGISTER 58 – INTERRUPT STATUS** 

## **Register Name: INT_STATUS** 

## **Register Type: READ to CLEAR** 

## **Register Address: 58 (Decimal); 3A (Hex)** 

|**BIT**|**NAME**|**FUNCTION**|
|---|---|---|
|[7:5]|WOM_INT[2:0]|Accelerometer WoM interrupt status. Cleared on Read.<br>111 – WoM interrupt on accelerometer|
|[4]|FIFO_OFLOW_INT|This bit automatically sets to 1 when a FIFO buffer overflow has been generated. The bit<br>clears to 0 after the register has been read.|
|[3]|-|Reserved.|
|[2]|GDRIVE_INT|Gyroscope Drive System Readyinterrupt|
|[1]|-|Reserved.|
|[0]|DATA_RDY_INT|This bit automatically sets to 1 when a Data Ready interrupt is generated. The bit clears<br>to 0 after the register has been read.|



## **REGISTERS 59 TO 64 – ACCELEROMETER MEASUREMENTS** 

**Register Name: ACCEL_XOUT_H** 

**Register Type: READ only Register Address: 59 (Decimal); 3B (Hex)** 

|**BIT**|**NAME**|**FUNCTION**|
|---|---|---|
|[7:0]|ACCEL_XOUT_H[15:8]|High byte of accelerometer x-axis data.|
|**Register Name: ACCEL_XOUT_L**|**Register Name: ACCEL_XOUT_L**||
|**Register Type: READ only**|**Register Type: READ only**||
|**Register Address: 60 (Decimal); 3C (Hex)**|**Register Address: 60 (Decimal); 3C (Hex)**||
|**BIT**|**NAME**|**FUNCTION**|
|[7:0]|ACCEL_XOUT_L[7:0]|Low byte of accelerometer x-axis data.|



**Register Name: ACCEL_XOUT_L** 

**Register Type: READ only Register Address: 60 (Decimal); 3C (Hex)** 

**Register Name: ACCEL_YOUT_H Register Type: READ only Register Address: 61 (Decimal); 3D (Hex)** 

|**BIT**|**NAME**|**FUNCTION**|
|---|---|---|
|[7:0]|ACCEL_YOUT_H[15:8]|High byte of accelerometery-axis data.|



Page 40 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

**Register Name: ACCEL_YOUT_L Register Type: READ only Register Address: 62 (Decimal); 3E (Hex) BIT NAME FUNCTION** [7:0] ACCEL_YOUT_L[7:0] Low byte of accelerometer y-axis data. ~~EEE eee~~ **Register Name: ACCEL_ZOUT_H Register Type: READ only Register Address: 63 (Decimal); 3F (Hex) BIT NAME FUNCTION** [7:0] ACCEL_ZOUT_H[15:8] High byte of accelerometer z-axis data. ~~EE eee~~ **Register Name: ACCEL_ZOUT_L Register Type: READ only Register Address: 64 (Decimal); 40 (Hex) BIT NAME FUNCTION** ~~eT~~ **[7:0] ACCEL_ZOUT_L[7:0]** Low byte of accelerometer z-axis data. **REGISTERS 65 AND 66 – TEMPERATURE MEASUREMENT Register Name: TEMP_OUT_H Register Type: READ only Register Address: 65 (Decimal); 41 (Hex) BIT NAME FUNCTION** ~~eT~~ [7:0] TEMP_OUT[15:8] High byte of the temperature sensor output. **Register Name: TEMP_OUT_L Register Type: READ only Register Address: 66 (Decimal); 42 (Hex)** ~~a~~ **BIT NAME FUNCTION** Low byte of the temperature sensor output [7:0] TEMP_OUT[7:0] **TEMP_degC** = ((TEMP_OUT – RoomTemp_Offset)/Temp_Sensitivity) + 25degC 

## **REGISTERS 67 TO 72 – GYROSCOPE MEASUREMENTS** 

**Register Name: GYRO_XOUT_H Register Type: READ only Register Address: 67 (Decimal); 43 (Hex) BIT NAME FUNCTION** [7:0] GYRO_XOUT[15:8] High byte of the X-Axis gyroscope output. ~~EE EEE EEE EO~~ **Register Name: GYRO_XOUT_L Register Type: READ only Register Address: 68 (Decimal); 44 (Hex) BIT NAME FUNCTION** ~~a es~~ Low byte of the X-Axis gyroscope output. ~~a~~ **GYRO_XOUT =** Gyro_Sensitivity * X_angular_rate [7:0] GYRO_XOUT[7:0] Nominal FS_SEL = 0 Conditions Gyro_Sensitivity = 131 LSB/(dps) 

Page 41 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

**Register Name: GYRO_YOUT_H Register Type: READ only** 

**Register Address: 69 (Decimal); 45 (Hex)** 

**BIT NAME FUNCTION** ~~ee~~ [7:0] GYRO_YOUT[15:8] High byte of the Y-Axis gyroscope output. **Register Name: GYRO_YOUT_L** 

**Register Type: READ only Register Address: 70 (Decimal); 46 (Hex)** 

**BIT NAME FUNCTION** ~~Rs~~ Low byte of the Y-Axis gyroscope output. [7:0] GYRO_YOUT[7:0] **GYRO_YOUT =** Gyro_Sensitivity * Y_angular_rate Nominal FS_SEL = 0 Conditions Gyro_Sensitivity = 131 LSB/(dps) 

**Register Name: GYRO_ZOUT_H Register Type: READ only Register Address: 71 (Decimal); 47 (Hex)** 

**BIT NAME FUNCTION** ~~CE~~ [7:0] GYRO_ZOUT[15:8] Hi ~~EO~~ gh byte of the Z-Axis ~~Oe~~ gyroscope output. **Register Name: GYRO_ZOUT_L Register Type: READ only Register Address: 72 (Decimal); 48 (Hex)** ~~a~~ **BIT NAME FUNCTION** Low byte of the Z-Axis gyroscope output. ~~ee~~ **GYRO_ZOUT =** Gyro_Sensitivity * Z_angular_rate [7:0] GYRO_ZOUT[7:0] Nominal FS_SEL = 0 Conditions Gyro_Sensitivity = 131 LSB/(dps) 

## **REGISTER 104 – SIGNAL PATH RESET** 

## **Register Name: SIGNAL_PATH_RESET Register Type: READ/WRITE Register Address: 104 (Decimal); 68 (Hex)** 

|**BIT**|**NAME**|**FUNCTION**|
|---|---|---|
|[7:2]|-|Reserved.|
|[1]|ACCEL_RST|Reset accel digital signal path.<br>**Note**: Sensor registers are not cleared. Use SIG_COND_RST to clear sensor registers.|
|[0]|TEMP_RST|Reset temp digital signal path.<br>**Note**: Sensor registers are not cleared. Use SIG_COND_RST to clear sensor registers.|



## **REGISTER 105 – ACCELEROMETER INTELLIGENCE CONTROL** 

## **Register Name: ACCEL_INTEL_CTRL** 

**Register Type: READ/WRITE Register Address: 105 (Decimal); 69 (Hex)** 

|**BIT**|**NAME**|**FUNCTION**|
|---|---|---|
|[7]|ACCEL_INTEL_EN|This bit enables the Wake-on-Motion detection logic.|
|[6]|ACCEL_INTEL_MODE|0 – Compares the current sample to the first sample taken when entering in<br>low-power mode.<br>1 – Compare the current sample with theprevious sample.|
|[5:1]|-|Reserved.|
|[0]|-|Reserved.<br>Must be set to 0 when WOM is activated. Please refer to section 5.1|



Page 42 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

## 9.26 **REGISTER 106 – USER CONTROL** 

## **Register Name: USER_CTRL** 

## **Register Type: READ/WRITE Register Address: 106 (Decimal); 6A (Hex)** 

|**BIT**|**NAME**|**FUNCTION**|
|---|---|---|
|[7]|-|Reserved.|
|[6]|FIFO_EN|1 – Enable FIFO operation mode.<br>0 – Disable FIFO access from serial interface. To disable FIFO writes by DMA, use FIFO_EN<br>register.|
|[5]|-|Reserved.|
|[4]|I2C_IF_DIS|1 – Disable I2C Slave module andput the serial interface in SPI mode only.|
|[3]|-|Reserved.|
|[2]|FIFO_RST|1 – Reset FIFO module. Reset is asynchronous. This bit auto clears after one clock cycle of the<br>internal 20 MHz clock.|
|[1]|-|Reserved.|
|[0]|SIG_COND_RST|1 – Reset all gyro digital signal path, accel digital signal path, and temp digital signal path.<br>This bit also clears all the sensor registers.|



## **REGISTER 107 – POWER MANAGEMENT 1** 

## **Register Name: PWR_MGMT_1 Register Type: READ/WRITE Register Address: 107 (Decimal); 6B (Hex)** 

|**BIT**|**NAME**|**FUNCTION**|**FUNCTION**|**FUNCTION**|**FUNCTION**|
|---|---|---|---|---|---|
|[7]|DEVICE_RESET|1 – Reset the internal registers and restores the default settings. The bit automatically clears<br>to 0 once the reset is done.||||
|[6]|SLEEP|When set to 1,the chipis set to sleepmode.||||
|[5]|ACCEL_CYCLE|When set to 1, and SLEEP and STANDBY are not set to 1, the chip will cycle between sleep<br>and taking a single accelerometer sample at a rate determined by SMPLRT_DIV<br>**Note**: When all accelerometer axes are disabled via PWR_MGMT_2 register bits and cycle is enabled, the<br>chip will wake up at the rate determined by the respective registers above, but will not take any<br>samples.||||
|[4]|GYRO_STANDBY|When set, the gyro drive and pll circuitry are enabled, but the sense paths are disabled. This<br>is a lowpower mode that allowsquick enablingof thegyros.||||
|[3]|TEMP_DIS|When set to 1,this bit disables the temperature sensor.||||
|[2:0]|CLKSEL[2:0]||**Code**|**Clock Source**||
||||0|Internal 20 MHz oscillator.||
||||1|Auto selects the best available clock source – PLL if ready,else use the Internal oscillator||
||||2|Auto selects the best available clock source – PLL if ready,else use the Internal oscillator||
||||3|Auto selects the best available clock source – PLL if ready,else use the Internal oscillator||
||||4|Auto selects the best available clock source – PLL if ready,else use the Internal oscillator||
||||5|Auto selects the best available clock source – PLL if ready,else use the Internal oscillator||
||||6|Internal 20 MHz oscillator.||
||||7|Stops the clock and keeps timing generator in reset.||



**Note** : The default value of CLKSEL[2:0] is 000. It is required that CLKSEL[2:0] be set to 001 to achieve full gyroscope performance. 

Page 43 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

## 9.28 **REGISTER 108 – POWER MANAGEMENT 2** 

## **Register Name: PWR_MGMT_2** 

## **Register Type: READ/WRITE** 

## **Register Address: 108 (Decimal); 6C (Hex)** 

|**BIT**|**NAME**|**FUNCTION**|
|---|---|---|
|[7]|FIFO_LP_EN|1 – Enable FIFO in low-power accelerometer mode. Default settingis 0.|
|[6]|-|Reserved.|
|[5]|STBY_XA|1 – X accelerometer is disabled.<br>0 – X accelerometer is on.|
|[4]|STBY_YA|1 – Y accelerometer is disabled.<br>0 – Y accelerometer is on.|
|[3]|STBY_ZA|1 – Z accelerometer is disabled.<br>0 – Z accelerometer is on.|
|[2]|STBY_XG|1 – X gyro is disabled.<br>0 – Xgyro is on.|
|[1]|STBY_YG|1 – Y gyro is disabled.<br>0 – Ygyro is on.|
|[0]|STBY_ZG|1 – Z gyro is disabled.<br>0 – Zgyro is on.|



## **REGISTERS 114 AND 115 – FIFO COUNT REGISTERS** 

## **Register Name: FIFO_COUNTH Register Type: READ Only Register Address: 114 (Decimal); 72 (Hex)** 

|**BIT**|**NAME**|**FUNCTION**|
|---|---|---|
|[7:5]|-|Reserved.|
|[4:0]|FIFO_COUNT[12:8]|High Bits; count indicates the number of written bytes in the FIFO.<br>Readingthis byte latches the data for both FIFO_COUNTH,and FIFO_COUNTL.|
|**Register Name: FIFO_COUNTL**|**Register Name: FIFO_COUNTL**||
|**Register Type: READ Only**|**Register Type: READ Only**||
|**Register Address: 115 (Decimal); 73 (Hex)**|**Register Address: 115 (Decimal); 73 (Hex)**||
|**BIT**|**NAME**|**FUNCTION**|
|[7:0]|FIFO_COUNT[7:0]|Low Bits; count indicates the number of written bytes in the FIFO.<br>**Note**: Must read FIFO_COUNTH to latch new data for both FIFO_COUNTH and FIFO_COUNTL.|



**Register Name: FIFO_COUNTL Register Type: READ Only Register Address: 115 (Decimal); 73 (Hex)** 

Page 44 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

## 9.30 **REGISTER 116 – FIFO READ WRITE** 

**Register Name: FIFO_R_W** 

**Register Type: READ/WRITE** 

## **Register Address: 116 (Decimal); 74 (Hex)** 

|**BIT**|**NAME**|**FUNCTION**|
|---|---|---|
|[7:0]|FIFO_DATA[7:0]|Read/Write commandprovides Read or Write operation for the FIFO.|



Description: 

This register is used to read and write data from the FIFO buffer. 

Data are written to the FIFO in order of register number (from lowest to highest). If all the FIFO enable flags (see below) are enabled, the contents of registers 59 through 72 will be written in order at the Sample Rate. 

The contents of the sensor data registers (Registers 59 to 72) are written into the FIFO buffer when their corresponding FIFO enable flags are set to 1 in FIFO_EN (Register 35). 

If the FIFO buffer has overflowed, the status bit _FIFO_OFLOW_INT_ is automatically set to 1. This bit is located in INT_STATUS (Register 58). When the FIFO buffer has overflowed, the oldest data will be lost and new data will be written to the FIFO unless register 26 CONFIG, bit[6] FIFO_MODE = 1. 

If the FIFO buffer is empty, reading register FIFO_DATA will return a unique value of 0xFF until new data are available. Normal data are precluded from ever indicating 0xFF, so 0xFF gives a trustworthy indication of FIFO empty. 

## **REGISTER 117 – WHO AM I** 

## **Register Name: WHO_AM_I** 

**Register Type: READ only** 

**Register Address: 117 (Decimal); 75 (Hex)** 

|**BIT**|**NAME**|**FUNCTION**|
|---|---|---|
|**[7:0]**|**WHOAMI**|Register to indicate to user which device is beingaccessed.|



This register is used to verify the identity of the device. The contents of _WHOAMI_ is an 8-bit device ID. The default value of the register is 0xF8. This is different from the I[2] C address of the device as seen on the slave I[2] C controller by the applications processor. The I[2] C address of the IAM-20680HP is 0x68 or 0x69 depending upon the value driven on AD0 pin. 

## **REGISTERS 119, 120, 122, 123, 125, 126 ACCELEROMETER OFFSET REGISTERS** 

## **Register Name: XA_OFFSET_H** 

**Register Type: READ/WRITE** 

## **Register Address: 119 (Decimal); 77 (Hex)** 

|||**BIT**|**NAME**|**FUNCTION**|
|---|---|---|---|---|
|||[7:0]|XA_OFFS[14:7]|Bits 14 to 7 of the 15-bit of the X accelerometer offset cancellation (2’s complement).<br>±16gOffset cancellation in all Full-Scale modes,15 bit 0.98-mgsteps|
|**Register Name: XA_OFFSET_L**|||||
|**Register Type: READ/WRITE**|||||
|**Register Address: 120 (Decimal); 78 (Hex)**||||**Register Address: 120 (Decimal); 78 (Hex)**|



|**BIT**|**NAME**|**FUNCTION**|
|---|---|---|
|[7:1]|XA_OFFS[6:0]|Bits 6 to 0 of the 15-bit of the X accelerometer offset cancellation.   (2’s complement).<br>±16gOffset cancellation in all Full-Scale modes,15 bit 0.98-mgsteps.|
|[0]|-|Reserved. This bit is set during factory calibration and the value must be kept unchanged.|



Page 45 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

**Register Name: YA_OFFSET_H Register Type: READ/WRITE Register Address: 122 (Decimal); 7A (Hex)** 

|**BIT**|**NAME**|**FUNCTION**|
|---|---|---|
|[7:0]|YA_OFFS[14:7]|Bits 14 to 7 of the 15-bit of the Y accelerometer offset cancellation (2’s complement).<br>±16gOffset cancellation in all Full-Scale modes,15 bit 0.98-mgsteps.|



**Register Name: YA_OFFSET_L Register Type: READ/WRITE Register Address: 123 (Decimal); 7B (Hex)** 

|**BIT**|**NAME**|**FUNCTION**|
|---|---|---|
|[7:1]|YA_OFFS[6:0]|Bits 6 to 0 of the 15-bit of the Y accelerometer offset cancellation (2’s complement).<br>±16gOffset cancellation in all Full-Scale modes,15 bit 0.98-mgsteps..|
|[0]|-|Reserved. This bit is set during factory calibration and the value must be kept unchanged.|



**Register Name: ZA_OFFSET_H Register Type: READ/WRITE Register Address: 125 (Decimal); 7D (Hex)** 

|||**BIT**|**NAME**|**FUNCTION**|
|---|---|---|---|---|
|||[7:0]|ZA_OFFS[14:7]|Bits 14 to 7 of the 15-bit of the Z accelerometer offset cancellation (2’s complement).<br>±16gOffset cancellation in all Full-Scale modes,15 bit 0.98-mgsteps.|
|**Register Name: ZA_OFFSET_L**|||||
|**Register Type: READ/WRITE**|||||
|**Register Address: 126 (Decimal); 7E (Hex)**||||**Register Address: 126 (Decimal); 7E (Hex)**|
|||**BIT**|**NAME**|**FUNCTION**|
|||[7:1]|ZA_OFFS[6:0]|Bits 6 to 0 of the 15-bit of the Z accelerometer offset cancellation (2’s complement).<br>±16gOffset cancellation in all Full-Scale modes,15 bit 0.98-mgsteps.|
|||[0]|-|Reserved. This bit is set during factory calibration and the value must be kept unchanged.|



Page 46 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

## _**10 ASSEMBLY**_ 

This section provides general guidelines for assembling TDK-InvenSense Micro Electro-Mechanical Systems (MEMS) gyros packaged in LGA package. 

## **ORIENTATION OF AXES** 

Figure 13 below shows the orientation of the axes of sensitivity and the polarity of rotation. Note the pin 1 identifier (•) in the figure. 

**==> picture [79 x 111] intentionally omitted <==**

**----- Start of picture text -----**<br>
+Z<br>+Z +Y<br>RS +Y<br>+X +X<br>**----- End of picture text -----**<br>


**Figure 13. Orientation of Axes of Sensitivity and Polarity of Rotation** 

Page 47 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

## **PACKAGE DIMENSIONS** 

16 Lead LGA (3x3x0.75) mm[3] NiAu pad finish 

**Figure 14. Package Dimensions** 

Page 48 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

|~~ee~~|**SYMBOLS**<br>~~ee~~<br>~~en~~|**DIMENSIONS IN MILLIMETERS**<br>~~PO~~<br>~~ee~~|**DIMENSIONS IN MILLIMETERS**<br>~~PO~~<br>~~ee~~|**DIMENSIONS IN MILLIMETERS**<br>~~PO~~<br>~~ee~~|
|---|---|---|---|---|
|||**MIN**<br>~~ee~~|**NOM**<br>~~ee~~|**MAX**<br>~~ee~~|
|**Total Thickness**<br>~~es~~|**A**<br>~~es~~<br>~~en~~<br>~~ee~~|0.7<br>~~es~~|0.75<br>~~es~~|0.8<br>~~es~~|
|**Substrate Thickness**<br>~~es~~|**A1**<br>~~en~~<br>~~es~~<br>~~ee~~|0.105                      REF<br>~~es~~|||
|**Mold Thickness**<br>~~Rs~~<br>~~ee~~|**A2**<br>~~ee~~<br>~~Rs~~<br>~~ee~~|0.63                        REF<br>~~Rs~~<br>~~ee~~|||
|**Body Size**<br>~~ee~~<br>~~es~~|**D**<br>~~ee~~<br>|2.9<br>~~ee~~<br>~~es~~<br>|3<br>~~ee~~<br>~~ee~~<br>|3.1<br>~~ee~~|
||**E**<br>~~ee~~<br>~~ees~~|2.9<br>~~ee~~<br>~~es~~<br>~~es ee~~|3<br>~~ee~~<br>~~ee~~<br>~~ee~~|3.1<br>~~ee~~|
|**Lead Width**<br>~~ee ~~<br>~~es~~|**W**<br> ~~ee~~<br>~~ees~~<br>~~rs~~|0.2<br>~~ee~~<br>~~es~~<br>~~es ee~~<br>~~rs~~|0.25<br>~~ee~~<br>~~ee~~<br>~~ee~~|0.3<br>~~ee~~|
|**Lead Length**<br>~~es~~<br>~~ee~~|**L**<br>~~ees~~<br>~~ee~~<br>~~rs~~|0.3<br>~~es ~~<br>~~es ee~~<br>~~ee~~<br>~~rs~~|0.35<br> ~~ee~~<br>~~ee~~<br>~~ee~~|0.4<br>~~ee~~|
|**Lead Pitch**<br>~~Rs~~|**e**<br>~~rs~~<br>~~Rs~~<br>~~er~~|0.5                           BSC<br>~~rs~~<br>~~Rs~~<br>|||
|**Lead Count**<br>~~es~~<br>~~ee~~|**n**<br>~~es~~<br>~~eree~~<br>~~ees eee~~|16<br>~~es~~<br>~~ee~~<br>~~eee~~|||
|**Edge Lead Center to Center**<br>~~ee~~<br>~~eee~~|**D1**<br>~~eree~~<br>~~ees eee~~|2                            BSC<br>~~ee~~<br>~~eee~~|||
||**E1**<br>~~ee~~<br>~~ees eee~~<br>~~eee~~|1                            BSC<br>~~ee~~<br>~~eee~~<br>~~eee~~|||
|**Body Center to Contact Lead**<br>~~ee~~<br>~~eee~~|**SD**<br>~~ee~~<br>~~ees eee~~<br>~~ee~~<br>~~eee~~|---                           BSC<br>~~ee~~<br>~~eee~~<br>~~ee~~<br>~~eee~~|||
||**SE**<br>~~eee~~|---                           BSC<br>~~eee~~|||
|**Ball Width**<br>~~eee~~<br>~~es~~|**b**<br>~~eee~~<br>~~es~~|---<br>~~eee~~<br>~~es~~|---<br>~~eee~~<br>~~es~~|---<br>~~eee~~<br>~~es~~|
|**Ball Diameter**<br>~~en~~|~~en~~|---<br>~~en~~|||
|**Ball Opening**<br>~~en~~|~~en~~|---<br>~~en~~|||
|**Ball Pitch**<br>~~Rn~~|**e1**<br>~~Rn~~|---<br>~~Rn~~|||
|**Ball Count**<br>~~Rn~~<br>~~Rs~~|**n1**<br>~~Rn~~<br>~~Rs~~|---<br>~~Rn~~<br>~~Rs~~|||
|**Pre-Solder**<br>~~Rs~~<br>~~Rs~~<br>~~ee~~|~~Rs~~<br>~~Rs~~<br>~~es~~|---<br>~~Rs~~<br>~~Rs~~|---<br>~~Rs~~<br>~~Rs~~|---<br>~~Rs~~<br>~~Rs~~|
|**Package Edge Tolerance**<br>~~Rs~~<br>~~ee~~|**aaa**<br>~~Rs~~<br>~~es~~|0.1<br>~~Rs~~|||
|**Mold Flatness**<br>~~ee~~<br>~~en~~|**bbb**<br>~~es~~<br>~~en~~|0.2<br>~~en~~|||
|**Coplanarity**<br>~~Rn~~|**ddd**<br>~~Rn~~|0.08<br>~~Rn~~|||
|**Ball Offset(Package)**<br>~~Rn~~<br>~~Rs~~|**eee**<br>~~Rn~~<br>~~Rs~~|---<br>~~Rn~~<br>~~Rs~~|||
|**Ball Offset(Ball)**<br>~~Rs~~<br>~~Rs~~|**fff**<br>~~Rs~~<br>~~Rs~~<br>~~er~~|---<br>~~Rs~~<br>~~Rs~~|||
|**Lead Edge to Package Edge **<br>~~Rs~~<br>~~Rs~~|**M**<br>~~Rs~~<br>~~Rs~~<br>~~er~~|0.05<br>~~Rs~~<br>~~Rs~~|0.1<br>~~Rs~~<br>~~Rs~~|0.15<br>~~Rs~~<br>~~Rs~~|



**Table 21. Package Dimensions** 

Page 49 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

## _**11 PART NUMBER PACKAGE MARKING**_ 

The part number package marking for IAM-20680HP devices is summarized below: 

|**PART NUMBER**||**PART NUMBER PACKAGE MARKING**|
|---|---|---|
|IAM-20680HP||IA268HP|
||**Table 22. Part Number Package Marking**|**Table 22. Part Number Package Marking**|



## **TOP VIEW** 

**==> picture [218 x 112] intentionally omitted <==**

**----- Start of picture text -----**<br>
Part Number IA268HP<br>Lot Traceability Code X X X X X X<br>  YYWW<br>Y Y = Year Code<br>W W = Work Week<br>**----- End of picture text -----**<br>


**Figure 15. Part Number Package Marking** 

Samples with Part Number Package Marking “IA268HP E” are engineering samples and may have deviations in respect to the specifications and functions reported in the datasheet. Engineering samples are not production-intent parts. 

Page 50 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

## _**12 REFERENCE**_ 

Please refer to “InvenSense MEMS Motion Handling and Assembly Guide (AN-IVS-0002A-00)” for the following information: 

- Manufacturing Recommendations 

   - Assembly Guidelines and Recommendations 

   - PCB Design Guidelines and Recommendations 

   - MEMS Handling Instructions 

   - ESD Considerations 

   - Reflow Specification 

   - Storage Specifications 

   - Package Marking Specification 

   - Tape & Reel Specification 

   - Reel & Pizza Box Label 

   - Packaging 

   - Representative Shipping Carton Label 

- Compliance 

   - Environmental Compliance 

   - DRC Compliance 

   - Compliance Declaration Disclaimer 

Page 51 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

## _**13 REVISION HISTORY**_ 

|**REVISION DATE**|**REVISION**||**DESCRIPTION**|
|---|---|---|---|
|10/05/2020|1.0|Initial revision||



Page 52 of 53 

Document Number: DS-000409 Revision: 1.0 

_**IAM-20680HP**_ 

This information furnished by InvenSense, Inc. (“InvenSense”) is believed to be accurate and reliable. However, no responsibility is assumed by InvenSense for its use, or for any infringements of patents or other rights of third parties that may result from its use. Specifications are subject to change without notice. InvenSense reserves the right to make changes to this product, including its circuits and software, in order to improve its design and/or performance, without prior notice. InvenSense makes no warranties, neither expressed nor implied, regarding the information and specifications contained in this document. InvenSense assumes no responsibility for any claims or damages arising from information contained in this document, or from the use of products and services detailed therein. This includes, but is not limited to, claims or damages based on the infringement of patents, copyrights, mask work and/or other intellectual property rights. 

Certain intellectual property owned by InvenSense and described in this document is patent protected. No license is granted by implication or otherwise under any patent or patent rights of InvenSense. This publication supersedes and replaces all information previously supplied. Trademarks that are registered trademarks are the property of their respective companies. InvenSense sensors should not be used or sold in the development, storage, production or utilization of any conventional or mass-destructive weapons or for any other weapons or life threatening applications, as well as in any other life critical applications such as medical equipment, transportation, aerospace and nuclear instruments, undersea equipment, power plant equipment, disaster prevention and crime prevention equipment. 

©2017—2019 InvenSense. All rights reserved. InvenSense, MotionTracking, MotionProcessing, MotionProcessor, MotionFusion, MotionApps, DMP, AAR, and the InvenSense logo are trademarks of InvenSense, Inc. The TDK logo is a trademark of TDK Corporation. Other company and product names may be trademarks of the respective companies with which they are associated. 

©2017—2019 InvenSense. All rights reserved. 

Page 53 of 53 

Document Number: DS-000409 Revision: 1.0
Updated at April 17, 2026
About Novapart

Novapart is a B2B electronic component broker specialising in stock shortages and cost reduction. We source hard-to-find parts and identify compliant alternatives across a catalogue of 410,000+ components from 500+ manufacturers.
Learn more →
Stock Shortage Specialist

When a component is unavailable, discontinued or has an unacceptable lead time, we tap into our network of vetted European and Asian distributors to source what you need — without compromising on quality or traceability.
Request a quote →
Compliant Alternatives

We identify pin-to-pin, electrically equivalent substitutes that meet the same certifications (RoHS, AEC-Q100, REACH) as your original specification — validated against datasheets, not just part numbers. Often at a lower cost.
BOM Analysis service →