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MEMS advanced smart sensor: 3D high performance accelerometer and signal processing core

The LIS331EB is an advanced low-power high-performance smart sensor system which includes a three-axis linear accelerometer and Cortex-M0 core with 64 KB Flash, 128 KB SRAM, 8 dual timers, 2 I2C (master/slave), 1 SPI (master/slave) and 1 UART (transmitter/receiver) in a 3x3x1 mm LGA package. The device features ultra-low-power operational modes that allow advanced power saving and smart sleep-to-wakeup functions. The LIS331EB has user-selectable full scales and is capable of measuring accelerations with selectable output data rates up to 1.6 kHz. An embedded self-test capability allows the user to check the functioning of the sensor in the final application. One possible use of the LIS331EB is as a sensor hub. For example, the device can collect inputs from the accelerometer (embedded), gyroscopes, compasses, pressure and other sensors through the master I2C and elaborates/fuses together 9 or 10 axes (iNemo Engine software) to provide quaternions to the main application processor. The LIS331EB is ECOPACK®, RoHS and “Green” compliant.

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Key Features

  • Motion sensor:
  • Ultra-low-power mode consumption down to 10 μA
  • ±2g/±4g/±6g/±8g/±16g selectable full scale
  • Data rate: 3.125 Hz to 1.6 kHz
  • 16-bit data output
  • 2 embedded state machines
  • Embedded self-test
  • 10000 g high shock survivability
  • ECOPACK®RoHS and “Green” compliant
  • Signal processor:
  • Brain: ARM-based, 32-bit Cortex-M0 CPU core
  • 64 Kbyte Flash memory
  • 128 Kbyte SRAM including 64 Kbyte with error code correction (ECC)
  • I2C master port
  • I2C slave port
  • SPI master/slave
  • 4-wire UART
  • 11 programmable GPIOs
  • Low-power features
  • 8 x 32-bit dual timers, watchdog timer (WDG), Cortex-M0 system tick (SysTick) timer
  • Standard 4-wire JTAG and 2-wire SWD
  • 80 MHz / 32 kHz RC / up to 80 MHz from single-ended external clock

Design Resources


Technical Documentation

Product Specifications

Description Version Size
DS10110: iNEMO-A advanced MEMS: 3D high-performance accelerometer and signal processor
2.0 1,153 KB

Application Notes

Description Version Size
AN2328: HID device coding example
1.1 54 KB
AN4156: Hardware abstraction layer for Android
1.0 370 KB

Technical Notes & Articles

Description Version Size
TN0018: Surface mounting guidelines for MEMS sensors in an LGA package
5.0 218 KB

Reference Manual

Description Version Size
RM0352: Brain smart hub family
1.0 1,553 KB

Programming Manual

Description Version Size
PM0222: Brain smart hub family
1.0 383 KB

Related Tools and Software

Related Tools and Software

Part Number Description
iNEMOEngine_PI3P PI3P engine PRO - platform independent
iNEMOEngine_PAAP PAAP engine PRO - Android Platform
iNEMOEngine_PW8 PW8 engine PRO - supports Win8 sensors

Publications and Collaterals

White Paper

Description Version Size
Mechanical characterization and simulation of fracture processes in polysilicon MEMS
1.0 9,933 KB
Physical Sensors Drive MEMS Consumerization Waves
1.0 886 KB

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