Datasheet
Preliminary Data Sheet
BMA400
Page 3 /
Confidential
BST-BMA400-DS000-00 | Version 0.1 | November 2017 Bosch Sensortec
© Bosch Sensortec GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such as copying and passing on to third parties.
BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany.
Note: Specifications within this document are subject to change without notice.
Table of contents
Contents
1. SPECIFICATION ............................................................................................................................. 8
2. ABSOLUTE MAXIMUM RATINGS .............................................................................................. 10
3. QUICK START GUIDE ................................................................................................................. 11
Note about using the BMA400: ................................................................................................. 11
First application setup examples algorithms: ............................................................................ 11
4. FUNCTIONAL DESCRIPTION ..................................................................................................... 17
4.1. SUPPLY VOLTAGE AND POWER MANAGEMENT ...................................................................... 18
4.2. POWER MODES – PERFORMANCE MODES ............................................................................. 19
Wake-up Interrupt / Auto wake-up ............................................................................................. 22
Auto low-power mode ............................................................................................................... 26
4.3. SENSOR DATA .................................................................................................................... 28
Acceleration Data ..................................................................................................................... 28
Filter Configuration ................................................................................................................... 28
G-range selection ..................................................................................................................... 29
Data Ready Interrupt ................................................................................................................ 29
Temperature Sensor ................................................................................................................. 29
Sensor Time ............................................................................................................................. 30
4.4. FIFO .................................................................................................................................. 31
FIFO description ....................................................................................................................... 31
FIFO input data......................................................................................................................... 31
FIFO read out ........................................................................................................................... 32
FIFO overflow behavior ............................................................................................................ 32
Frames ..................................................................................................................................... 33
Under-read ............................................................................................................................... 36
Partial frame read ..................................................................................................................... 36
Over-read ................................................................................................................................. 36
Reading nearly-empty FIFO...................................................................................................... 36
FIFO flushing ............................................................................................................................ 37
FIFO watermark interrupt .......................................................................................................... 37
FIFO full interrupt ...................................................................................................................... 39
4.5. GENERAL INTERRUPT PIN CONFIGURATION ........................................................................... 40
Interrupt Pin Mapping ............................................................................................................... 40
Interrupt latching ....................................................................................................................... 40
Interrupt behavior during power mode switching ....................................................................... 41
Electrical Interrupt Pin Behavior ................................................................................................ 42
4.6. INTERRUPT FEATURES ......................................................................................................... 43
Confidential and under NDA
Seeed Studio
Confidential and under NDA
Seeed Studio
Confidential and under NDA