CMA3000-D0X Datasheet, PDF (2/35 Pages) VTI technologies – 3-axis accelerometer

CMA3000-D0X Series
TABLE OF CONTENTS
1 General Description ........................................................................................................... 5
1.1 Introduction ................................................................................................................................5
1.2 Functional Description ..............................................................................................................5
1.2.1 Sensing element..................................................................................................................5
1.2.2 Interface IC...........................................................................................................................5
1.2.3 Factory calibration ..............................................................................................................5
1.2.4 Supported features .............................................................................................................6
1.2.5 Operation modes.................................................................................................................6
1.2.5.1 Power Down .................................................................................................................................6
1.2.5.2 Measurement................................................................................................................................6
1.2.5.3 Motion Detection..........................................................................................................................6
1.2.5.4 Free-Fall Detection ......................................................................................................................6
1.2.6 Interrupt................................................................................................................................6
1.2.7 Operational flow chart ........................................................................................................7
2 Reset and power up, Operation Modes, HW functions and Clock ................................. 8
2.1 Reset and power up...................................................................................................................8
2.2 Power Down mode.....................................................................................................................8
2.3 Measurement Mode ...................................................................................................................8
2.3.1 Description...........................................................................................................................8
2.3.2 Usage....................................................................................................................................8
2.4 Motion Detection Mode .............................................................................................................8
2.4.1 Description...........................................................................................................................8
2.4.2 Usage....................................................................................................................................9
2.4.3 Example..............................................................................................................................10
2.5 Free-Fall Detection...................................................................................................................10
2.5.1 Description.........................................................................................................................10
2.5.2 Usage..................................................................................................................................10
2.5.3 Example..............................................................................................................................10
2.6 Interrupt function (INT-pin) .....................................................................................................11
2.6.1 Usage..................................................................................................................................11
2.7 Clock .........................................................................................................................................11
3 Addressing Space ............................................................................................................ 12
3.1 Register Description................................................................................................................12
3.2 Non-volatile memory ...............................................................................................................12
3.3 Registers...................................................................................................................................12
4 Serial Interfaces ............................................................................................................... 17
4.1 SPI Interface .............................................................................................................................17
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