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Firmware supports touch detection via charge transfer

Posted: 21 Dec 2010     Print Version  Bookmark and Share

Keywords:capacitive sensing  firmware library  MCUs 

STMicroelectronics unveils its second-generation of its STMTouch capacitive touch-sensing firmware library which supports touch detection via charge-transfer offering sensitivity and robustness.

The firmware, featuring EnergyLite technology, offers designers the ability to add advanced user-interface features to applications using 8bit STM8 microcontrollers. It now supports over 200 STM8 part numbers, including the advanced STM8S family and the STM8L.

Also, simultaneous channel acquisition reduces CPU usage to help designers optimise application features and power consumption. The library also provides improved wheel and slider controls that feature 256-level resolution.

The STM8 touch sensing firmware library features include complete library with acquisition, post processing and API layers; provided with C source code; support for up to 24 keys and two wheels/sliders; support for both charge-transfer and RC-timing touch detection; enhanced processing features for optimised sensitivity and immunity; active shield feature; automatic calibration software; and built-in compensation of environmental fluctuations.

The STMT/8L-EV1 evaluation board for touch development on STM8L MCUs is priced at Rs.2,188.84 ($49). The STM8/128-EV/TS supporting the STM8S family is available for Rs.7,995.95 ($179).

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