Using USB Connectivity to Integrate Touch Screens
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Most touch screen systems will connect with the host CPU or application processor through a USB interface; however, none of today's major touch screen controllers support USB natively. As a result, touch screen system integrators must "bridge" a USB microcontroller between the host and the touch controller(s). This white paper focuses on how to simplify touch screen application development by using USB interface ICs to streamline the connection between touch controllers and host CPUs.