原标题：ST LIS331DLH 3轴MEMS运动传感器解决方案

　　ST公司的LIS331DLH是超低功耗高性能3轴数字加速度计,动态可选择的满刻度为±2g/±4g/±8g ,16位输出数据速率从0.5 Hz 到1 kHz ,I2C/SPI数字输出接口,工作电压2.16V-3.6V,超低功耗模式功耗可低到10uA,6D取向检测,能抗10000g震动,主要用在自由跌落检测,游戏和虚构输入设备,震动监视和补偿,显示器取向,计步器等.本文介绍了LIS331DLH主要特性,方框图,电连接以及STEVAL-MKI022V1演示板主要特性,电路图和材料厂清单(BOM).

　　MEMS motion sensor: Ultra low power high performance 3-axis digital accelerometer

　　The LIS331DLH is an ultra low-power high performance three axes linear accelerometer belonging to the "nano" family, with digital I2C/SPI serial interface standard output.

　　The device features ultra low-power operational modes that allow advanced power saving and smart sleep to wake-up functions.

　　The LIS331DLH has dynamically user selectable full scales of ±2g/±4g/±8g and it is capable of measuring accelerations with output data rates from 0.5 Hz to 1 kHz.

　　The self-test capability allows the user to check the functioning of the sensor in the final application.

　　The device may be configured to generate interrupt signal by inertial wake-up/free-fall events as well as by the position of the device itself.

　　Thresholds and timing of interrupt generators are programmable by the end user on the fly.

　　The LIS331DLH is available in small thin plastic land grid array package (LGA) and it is guaranteed to operate over an extended temperature range from -40℃to +85℃.

　　LIS331DLH主要特性:

　　Wide supply voltage, 2.16 V to 3.6 V

　　Low voltage compatible IOs, 1.8 V

　　Ultra low-power mode consumption down to 10 μA

　　±2g/±4g/±8g dynamically selectable full-scale

　　I2C/SPI digital output interface

　　16 bit data output

　　2 independent programmable interrupt generators for free-fall and motion detection

　　Sleep to wake-up function

　　6D orientation detection

　　Embedded self-test

　　10000 g high shock survivability

　　ECOPACK® RoHS and "Green" compliant

　　LIS331DLH应用:

　　■ Motion activated functions

　　■ Free-fall detection

　　■ Intelligent power saving for handheld devices

　　■ Pedometer

　　■ Display orientation

　　■ Gaming and virtual reality input devices

　　■ Impact recognition and logging

　　■ Vibration monitoring and compensation

　　图1.LIS331DLH方框图

　　图2.LIS331DLH电连接框图

　　STEVAL-MKI022V1演示板

　　The STEVAL-MKI022V1 is a demonstration kit designed to provide the user with a complete, ready-to-use platform for demonstration of the LIS331DLH. The LIS331DLH is a low-power 3-axis linear accelerometer with digital output. The device includes a sensing element and an IC interface capable of translating information from the sensing element into a measured signal that can be used for external applications.

　　In addition to the MEMS sensor, the demonstration board uses an ST7-USB microcontroller that functions as a bridge between the sensor and the PC. The microcontroller may be used for the graphical user interface which is downloadable from our website, or for dedicated software routines for customized applications.

　　STEVAL-MKI022V1演示板主要特性:

　　Powered directly from USB connector

　　I2C/SPI digital output interface

　　Sleep to wake-up function

　　6D orientation detection

　　Graphical user interface (GUI)

　　Both the hardware and software that compose the STEVAL-MKI022V1 demonstration kit have been designed to operate with Microsoft® Windows XP

　　RoHS compliant

　　图3.STEVAL-MKI022V1演示板方框图

　　The ST7-USB microcontroller included on the board allows communication between the

　　sensor device and the PC. The user can interact with the hardware either through the GUI

　　provided with the kit or through dedicated software routines to run customized applications.

　　图4.STEVAL-MKI022V1演示板外形图

　　STEVAL-MKI022V1演示板材料清单(BOM):