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issue: December 2009 APPLIANCE Magazine


Web Exclusive: Touch-Sensing Controller Performs Automatic Calibrations


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Cypress Semiconductor Corp. (San Jose, CA, U.S.; www.cypress.com) introduced a new line of CapSense capacitive touch-sensing devices with low-power 1.8-V operation to extend battery life in handheld devices. Designed to replace mechanical buttons and sliders, the CY8C20xx6A devices are said to have the most precise scanning of any CapSense devices. With high immunity to conducted and radiated noise, as well as robust waterproofing, the new devices are suited for touch-sensing operation in applications such as white goods, home appliances, computers and TVs.

According to Cypress, the CY8C20xx6A family offers the new patent-pending SmartSense solution, which automatically calibrates capacitive-sensing parameters during the design process, cutting days of development time. The solution optimizes the baseline and detection threshold and adjusts for the optimal capacitance range. In addition, the CY8C20xx6A devices have up to 36 general-purpose I/Os to implement multiple CapSense interfaces. Leveraging the firm’s PSoC programmable system-on-chip architecture, a single new CapSense device can also manage functions such as motor control, intelligent sensing, and LED control—a capability called CapSense Plus. The new devices also include a full-speed USB interface. They are available in multiple configurations and packages, including a small form factor 3 × 3 × 0.6-mm 16-pin QFN.

 

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