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MCU boast lowest power capacitive touch

Posted: 26 Apr 2011 ?? ?Print Version ?Bookmark and Share

Keywords:16bit? microcontroller? power touch? capacitive?

Enabling low power touch sense capabilities on all MSP430 devices, Texas Instruments Inc. has released the ultra-low-power MSP430 16bit microcontroller capacitive touch portfolio. Building on TI's embedded processing capabilities, the portfolio offers hardware and free software solutions that offer developers easy-to-use, cost-effective options for microcontroller-based capacitive touch applications, while benefitting from the battery-saving features of MSP430 devices.

The MSP430 capacitive touch library gives developers the option to add touch sense capabilities to any MSP430 microcontroller. The open source software library eliminates the need to develop complex touch sensing algorithms and supports various capacitive touch sensors, including buttons, sliders, wheels and proximity. Although the software library supports all MSP430 devices, some include new peripherals optimized specifically for touch sense applications. The MSP430 Value Line G2xx2 and G2xx3 devices include capacitive touch I/Os, which enable developers to interface directly with capacitive touch pads without external components. Additionally, developers can look forward to upcoming MSP430F51x2 devices boasting Timer_D, a new high-resolution timer that enables high-precision touch sensing. Rounding out the portfolio are TI's easy-to-use, low-cost kits, including the Capacitive Touch BoosterPack, a plugin for the MSP430 Value Line LaunchPad development tool, which allows for rapid evaluation and development of touch sensing applications. Additionally, the MSP430F5529 experimenter board gives developers a highly-integrated evaluation platform to use touch sense buttons with a wide range of peripherals and sensors.

The MSP430 capacitive touch library is free and can be downloaded at the company website. The new MSP430G2xx2 devices are priced from $0.33 for 100K units and the G2xx3 devices are priced from $0.42 for 100K units. Samples are immediately available. The Capacitive Touch BoosterPack (430BOOST-SENSE1) is priced at $4.30 for a limited time. The MSP430F5529 Experimenter Board is priced at $149 and can be ordered now. Sample MSP430F51x2 devices will be available in 3Q11.

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