Cypress Semiconductor recently announced an automatic tuning solution for its CapSense capacitive touch-sensing devices. While other solutions require engineers to perform time-consuming calibrations for up to 15 capacitive-sensing parameters, the patent-pending SmartSense solution sets these automatically during the design process, significantly reducing development time. The solution dynamically optimises the baseline and detection threshold and adjusts for the optimal capacitance range. The SmartSense capability greatly simplifies the replacement of mechanical buttons and sliders, allowing designers to create a single platform for multiple industrial designs without having to manually optimise performance for each design.
Engineers can simply incorporate the SmartSense firmware using the PSoC Designer embedded design tool and instantly develop touch-sensing interfaces that provide reliable operation over a wide range of capacitance values. This eliminates the need to retune a design each time the thickness or material used for the interface overlay changes. Furthermore, the solution ensures that manufacturing variations in PCBs, overlays and changes in noise environment are automatically calibrated out.
The firmware for the SmartSense capability is supported in Cypress’s new CY8C20xx6A CapSense devices with low-power 1,8 V operation. Existing CY8C20xx6A customers can upgrade current projects to the SmartSense firmware module in PSoC Designer 5.0 software with Service Pack 6 at www.cypress.com/go/designerpack6.
The new CY8C20xx6A devices have up to 36 CapSense I/Os and six sliders, along with I²C, SPI and USB interfaces. The low-power devices provide high immunity to conducted and radiated noise and extended battery life in applications such as mobile handsets, Bluetooth headsets, multimedia buttons, LCD TVs and monitors, printers and more. CapSense devices also provide robust waterproofing and proximity sensing with wide range. Leveraging the PSoC programmable system-on-chip architecture, a single CapSense device can also manage functions such as haptics, intelligent sensing, LED control and more.
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