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CAPACITANCE SENSING TOUCHPAD CIRCUIT CAPABLE OF DUAL USE AS A TOUCHPAD CONTROLLER AND KEYBOARD CONTROLLER

  • US 20070279385A1
  • Filed: 03/28/2007
  • Published: 12/06/2007
  • Est. Priority Date: 03/28/2006
  • Status: Abandoned Application
First Claim
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1. A single system for controlling operation of a touchpad and a keyboard, said system comprised of:

  • a touchpad sensor control circuit that is coupled to a first set of X and Y electrodes operating as touchpad sensors and disposed within a touchpad;

    the touchpad sensor control circuit that is also coupled to a second set of X and Y electrodes operating as keyboard key sensors and disposed within a keyboard; and

    wherein the touchpad sensor control circuit controls operation of the touchpad in a first mode, and wherein the touchpad sensor control circuit controls operation of the keyboard in a second mode.

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