Sensors
Freescale Semiconductor 2
MMA7660FC
Contents
ELECTRO STATIC DISCHARGE (ESD) ...................................................................................................................................... 6
PRINCIPLE OF OPERATION ...................................................................................................................................................... 8
MODES OF OPERATION ............................................................................................................................................................ 9
CONFIGURABLE SAMPLES PER SECONDS AND INTERRUPT SETTINGS ......................................................................... 10
POWER SAVING FEATURES ................................................................................................................................................... 10
TESTING THE LOGIC CHAIN ................................................................................................................................................... 10
FEATURES ................................................................................................................................................................................ 10
Tap Detection ...................................................................................................................................................................... 11
Shake Detection .................................................................................................................................................................. 12
Auto-Wake/Sleep ................................................................................................................................................................ 12
REGISTER DEFINITIONS .........................................................................................................................................................13
SERIAL INTERFACE ................................................................................................................................................................. 20
Serial-Addressing ................................................................................................................................................................ 20
Start and Stop Conditions ...................................................................................................................................................20
Bit Transfer ..........................................................................................................................................................................20
Acknowledge ....................................................................................................................................................................... 21
The Slave Address ..............................................................................................................................................................21
Message Format for Writing MMA7660FC .......................................................................................................................... 21
Message Format for Reading MMA7660FC ........................................................................................................................ 22
APPENDIX A – PACKAGE REQUIREMENTS FOR MMA7660FC ............................................................................................ 23
Minimum Recommended Footprint for Surface Mounted Applications ............................................................................... 23
Soldering And Mounting Guidelines for the DFN Accelerometer Sensor to a PC Board .................................................... 23
Overview of Soldering Considerations ................................................................................................................................ 23
Halogen Content .................................................................................................................................................................23
PCB Mounting Recommendations ...................................................................................................................................... 23
APPENDIX B - SENSING DIRECTION ...................................................................................................................................... 25
APPENDIX C - MMA7660FC ACQUISITION CODE TABLE .................................................................................
.................... 26
