Electronics Technology


Smart sensor translates finger hits into action

25 July 2007 Electronics Technology

STMicroelectronics has released a new digital-output two-axis linear accelerometer based on MEMS technology. Smart features embedded in the IC include click and double-click recognition, motion-detection/wake-up and high-pass filters. The device makes it easier to associate simple tapping gestures with user commands, such as opening a document or selecting an option from an application menu. Similarly, a ringing mobile phone can be muted with a single tap, without taking the phone out of the pocket. The configurable high-pass filters can be turned on to enable motion-activated functions and vibration monitoring, regardless of whether the end product is tilted or placed upside down at the moment of measurement. The embedded motion detection/wake-up feature can cut power consumption in products that need to be powered on (or off) while or after they have been touched or moved, such as in remote controls. The digital output through standard SPI/I²C user-selectable interface makes the sensor's integration in the system easier and more effective. The new sensor also provides two separate, highly programmable interrupt signals that enable immediate notification of motion detection and click/double-click events.



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