Patent ID: 7965280
Filing Date: 2011-06-21
Classification: G06F

Abstract:
1. Touch screen controller circuitry comprising: a host processor; a touch screen assembly having first and second resistive screens and having a first, second, and third terminals; pen touch detection circuitry for providing a pen touch detection signal having a first level if a touch point of touch screen assembly is detected, wherein the pen touch detection circuitry includes: a control circuit for receiving the pen touch detection signal and for receiving a convert command from the host processor and operative to produce an interrupt signal to be sent to the host processor in response to the pen touch detection signal if the first level is received, and operative to reset the interrupt signal in response to the pen touch detection signal if the second level is received before the convert command is received from the host processor, the interrupt signal representing an interrupt service request for the convert command, wherein resetting of the interrupt signal cancels the interrupt service request.