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MEMS touts 2 embedded finite-state machines

Posted: 09 Nov 2011 ?? ?Print Version ?Bookmark and Share

Keywords:MEMS accelerometer? finite-state machine? motion-sensitive?

STMicroelectronics has introduced introduced what it claims as the industry's first three-axis high-resolution accelerometer with two embedded finite-state machines.

The programmable blocks enable custom motion recognition inside the sensor, reducing system complexity and power consumption in motion-sensitive mobile phones and other smart consumer devices that let users answer calls, turn the ringer on or off, or launch applications such as a pedometer, with a defined motion.


The LIS3DSH three-axis linear accelerometer leverages ST's micromachining technology process.

ST's LIS3DSH accelerometer provides extremely accurate output across full-scale ranges of 2g/4g/8g/16g and boasts excellent stability over time and temperature. Other features include power-down and sleep modes, an embedded FIFO (first-in first-out) memory block, a temperature sensor and a self-test function.

The embedded finite-state machines allow the user to implement customized motion-detection-based applications with a high level of flexibility, reducing the workload of the microprocessor by moving programming functionality inside the sensor. These basic programs identify specific motions or gestures, custom-defined in the instruction set that runs inside the sensor firmware, and initiate associated actions or applications.

"Integrated processing capability in MEMS sensors decreases power consumption at the system level, which is especially crucial in battery-hungry portable devices," said Benedetto Vigna, corporate vice president and general manager of ST's analog, MEMS and sensor group. "An industry-unique feature, programmable state machines embedded in the sensor, also bring more freedom and flexibility to the design of motion-enabled consumer electronics."

The LIS3DSH three-axis linear accelerometer leverages ST's micromachining technology process and will start mass production in the first quarter of 2012. Unit unit pricing will be $1.2 for 1,000-piece quantitites.

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