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Low-Power, Configurable Touch-Sensing Controller Adds Auto-Calibration

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Low-Power, Configurable Touch-Sensing Controller Adds Auto-Calibration

A new line of capacitive touch-sensing devices features low-power 1.8V operation to extend battery life in handheld mobile consumer applications. The CY8C20xx6A CapSense devices from Cypress Semiconductor replace mechanical buttons and sliders, offering attractive, functional interface options for designers. The new family also offers improved response time with the most precise scanning of any CapSense devices. With superior immunity to conducted and radiated noise, as well as robust waterproofing, the new devices also enable reliable touch-sensing operation in applications such as white goods, home appliances, printers, computers and TVs/monitors. 

The CY8C20xx6A devices have up to 36 general-purpose I/Os (GPIOs) to implement multiple CapSense interfaces. Leveraging the PSoC programmable system-on-chip architecture, a single new CapSense device can also manage functions such as motor control, intelligent sensing, LED control and more—a capability called CapSense Plus. Additionally, the new devices include a full-speed USB interface. The easy-to-use CapSense devices allow customers to bring products to market quickly. The CY8C20xx6A device line is available in multiple configurations and packages, including a small form factor 3x3x0.6-mm 16-pin QFN.

Additionally, the CY8C20xx6A family offers the new SmartSense solution, which automatically calibrates capacitive-sensing parameters during the design process, cutting days of development time. While existing solutions require engineers to perform time-consuming calibrations for up to 15 capacitive-sensing parameters, the new SmartSense solution from Cypress Semiconductor, developed for its CapSense devices, sets these automatically during the design process, significantly reducing development time. 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 optimize 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, reducing time-to-market and saving development costs for customers. Furthermore, the solution ensures that manufacturing variations in PCBs, overlays and changes in noise environment are automatically calibrated out. 

The new CY8C20xx6A CapSense devices are supported by the CY3280-20X66 CapSense Development Kit, which includes a development board with ports for the following Plug-in Modules:

• CY3280-SLM – Linear Slider Module
• CY3280-SRM – Radial Slider Module 
• CY3280-TPM – Trackpad Module 
• CY3280-BSM – Simple Button Module 
• CY3280-BMM – Matrixed Button Module 
• CY3280-BBM – Breadboard Module

Each package option of the new low-power devices is also supported by a CY3250-20xx6 ICE Pod Kit that includes emulator pods and feet, enabling a designer to perform system-level debugging. 

Cypress Semiconductor
San Jose, CA.
(408) 613-7900.
[www.cypress.com].