BMA255 datasheet(4/119 Pages) ETC2

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BMA255

Data sheet

Page 4

BST-BMA255-DS004-04 | Revision 1.1 | December 2013

Bosch Sensortec

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.

Index of Contents

1. SPECIFICATION ........................................................................................................................8

2. ABSOLUTE MAXIMUM RATINGS..........................................................................................11

3. BLOCK DIAGRAM ...................................................................................................................12

4. FUNCTIONAL DESCRIPTION.................................................................................................13

4.1 SUPPLY VOLTAGE AND POWER MANAGEMENT ..................................................................... 13

4.2 POWER MODES................................................................................................................. 14

4.3 SENSOR DATA .................................................................................................................. 18

4.3.1 ACCELERATION DATA ....................................................................................................................18

4.3.2 TEMPERATURE SENSOR ............................................................................................................... 19

4.4 SELF-TEST ....................................................................................................................... 20

4.5 OFFSET COMPENSATION ................................................................................................... 21

4.5.1 SLOW COMPENSATION ..................................................................................................................23

4.5.2 FAST COMPENSATION....................................................................................................................23

4.5.3 MANUAL COMPENSATION...............................................................................................................24

4.5.4 INLINE CALIBRATION ......................................................................................................................24

4.6 NON-VOLATILE MEMORY .................................................................................................... 25

4.7 INTERRUPT CONTROLLER .................................................................................................. 26

4.7.1 GENERAL FEATURES .................................................................................................................... 26

4.7.2 MAPPING TO PHYSICAL INTERRUPT PINS (INTTYPE TO INT PIN#)......................................................27

4.7.3 ELECTRICAL BEHAVIOUR (INT PIN# TO OPEN-DRIVE OR PUSH-PULL)................................................28

4.7.4 NEW DATA INTERRUPT...................................................................................................................28

4.7.5 SLOPE / ANY-MOTION DETECTION ................................................................................................. 29

4.7.6 TAP SENSING ................................................................................................................................31

4.7.7 ORIENTATION RECOGNITION ..........................................................................................................34

4.7.8 FLAT DETECTION.......................................................................................................................... 39

4.7.9 LOW-G INTERRUPT....................................................................................................................... 40

4.7.10 HIGH-G INTERRUPT .....................................................................................................................41

4.7.11 NO-MOTION / SLOW MOTION DETECTION.......................................................................................42

4.8 SOFTRESET...................................................................................................................... 44

5. FIFO OPERATION ...................................................................................................................45

5.1 FIFO OPERATING MODES ................................................................................................. 45

5.2 FIFO DATA READOUT ....................................................................................................... 46

5.3 FIFO FRAME COUNTER AND OVERRUN FLAG ..................................................................... 46

5.4 FIFO INTERRUPTS ............................................................................................................ 47

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