方案文档下载：

MMA7660FCR1.pdf    

方案设计图：

方案关键器件表：

类型	型号	厂商	说明
Sensor	MMA7660FCR1	Freescale	MMA7660FC, 3-Axis Orientation/Motion Detection Sensor

方案描述：

The MMA7660FC is a Digital Output (I2C), very low power, low profile capacitive micro machined accelerometer featuring a low pass filter, compensation for 0g offset and gain errors, and conversion to 6- bit digital values at a user configurable output data rate. The device can be used for sensor data changes, product orientation, and gesture detection through an interrupt pin (INT). The device is housed in an extremely small 3mm x 3mm x 0.9mm DFN package.
Features
 Digital Output (I2C)
 3mm x 3mm x 0.9mm DFN package
 Low Power Current Consumption
    Off Mode: 0.4 μA
    Standby Mode: 2 μA
    Active Mode: Configurable down to 47 μA
 Low Voltage Operation: 2.4 V – 3.6 V
 3-Axis ±1.5 g MEMS Sensor and CMOS Interface Controller Built Into One Package
 Configurable Output Data Rate From 1 To 120 Samples A Second
 Auto Wake/Sleep Feature for Low Power Consumption
 Tilt Orientation Detection for Portrait/Landscape Capability
 Gesture Detection Including Shake Detection and Pulse Detection
 Robust Design, High Shocks Survivability (10,000 g)
 RoHS Compliant
 Environmentally Preferred Product
 Low Cost