STEVAL-MKI090V1 STMicroelectronics

LIS331DLF MEMS digital output motion sensor ultra low-power high performance 3-axes nano accelerometer Features 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 A LGA 16 (3x3x1 mm) 2g/4g/8g dynamically selectable full-scale 2 2 I C/SPI digital output interface belonging to the nano family, with digital I C/SPI serial interface standard output. 6 bit resolution 2 independent programmable interrupt The device features ultra low-power operational generators for free-fall and motion detection modes that allow advanced power saving and smart sleep to wake-up functions. Sleep to wake-up function The LIS331DLF has dynamically user selectable 6D orientation detection full scales of 2g/4g/8g and it is capable of Embedded self-test measuring accelerations with output data rates 10000 g high shock survivability from 0.5 Hz to 400 Hz. ECOPACK RoHS and Green compliant (see The self-test capability allows the user to check Section 8) the functioning of the sensor in the final application. Applications The device may be configured to generate interrupt signal by inertial wake-up/free-fall events Display orientation as well as by the position of the device itself. Gaming Thresholds and timing of interrupt generators are User interface programmable by the end user on the fly. Motion activated functions The LIS331DLF is available in small thin plastic Intelligent power saving for handheld devices land grid array package (LGA) and it is guaranteed to operate over an extended Impact recognition and logging temperature range from -40 C to +85 C. Description The LIS331DLF is an ultra low-power high performance three axes linear accelerometer Table 1. Device summary Order codes Temperature range C Package Packaging LIS331DLF -40 to +85 LGA 16 Tray LIS331DLFTR -40 to +85 LGA 16 Tape and reel July 2009 Doc ID 15101 Rev 4 1/38 www.st.com 38 Obsolete Product(s) - Obsolete Product(s) Contents LIS331DLF Contents 1 Block diagram and pin description . 6 1.1 Block diagram . 6 1.2 Pin description 6 2 Mechanical and electrical specifications 8 2.1 Mechanical characteristics . 8 2.2 Electrical characteristics . 9 2.3 Communication interface characteristics . 10 2.3.1 SPI - serial peripheral interface . 10 2.3.2 I2C - Inter IC control interface 11 2.4 Absolute maximum ratings 12 2.5 Terminology . 13 2.5.1 Sensitivity 13 2.5.2 Zero-g level 13 2.5.3 Self-test . 13 2.5.4 Sleep to wake-up 13 3 Functionality 14 3.1 Sensing element 14 3.2 IC interface 14 3.3 Factory calibration 14 4 Application hints . 15 4.1 Soldering information 15 5 Digital interfaces . 16 5.1 I2C serial interface 16 5.1.1 I2C operation . 17 5.2 SPI bus interface . 18 5.2.1 SPI read . 19 5.2.2 SPI write 20 5.2.3 SPI read in 3-wires mode . 21 2/38 Doc ID 15101 Rev 4 Obsolete Product(s) - Obsolete Product(s)