Sensors
Freescale Semiconductor 2
MMA7660FC
Contents
DEFINITIONS ............................................................................................................................................................................... 5
ELECTRO STATIC DISCHARGE (ESD) ......................................................................................................................................7
PRINCIPLE OF OPERATION ...................................................................................................................................................... 9
MODES OF OPERATION .......................................................................................................................................................... 10
CONFIGURABLE SAMPLES PER SECONDS AND INTERRUPT SETTINGS ......................................................................... 11
POWER SAVING FEATURES ................................................................................................................................................... 11
TESTING THE LOGIC CHAIN ................................................................................................................................................... 11
FEATURES ................................................................................................................................................................................ 11
Tap Detection ......................................................................................................................................................................13
Shake Detection .................................................................................................................................................................. 13
Auto-Wake/Sleep ................................................................................................................................................................ 13
REGISTER DEFINITIONS ......................................................................................................................................................... 14
SERIAL INTERFACE ................................................................................................................................................................. 22
Serial-Addressing ................................................................................................................................................................ 22
Start and Stop Conditions ................................................................................................................................................... 22
Bit Transfer .......................................................................................................................................................................... 22
Acknowledge ....................................................................................................................................................................... 23
The Slave Address .............................................................................................................................................................. 23
Message Format for Writing MMA7660FC ..........................................................................................................................23
Message Format for Reading MMA7660FC ........................................................................................................................ 24
APPENDIX A - PACKAGE REQUIREMENTS FOR MMA7660FC .............................................................................................25
Minimum Recommended Footprint for Surface Mounted Applications ...............................................................................25
Soldering And Mounting Guidelines for the DFN Accelerometer Sensor to a PC Board .................................................... 25
Overview of Soldering Considerations ................................................................................................................................ 25
Halogen Content ................................................................................................................................................................. 25
PCB Mounting Recommendations ...................................................................................................................................... 25
APPENDIX B - SENSING DIRECTION ...................................................................................................................................... 27
APPENDIX C - MMA7660FC ACQUISITION CODE TABLE ..................................................................................................... 28
APPENDIX D -
I
2
C AC CHARACTERISTICS ............................................................................................................................30
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