| 摘要 |
A touch screen controller ( 1 A) includes circuitry ( 2 B) for generating a pen touch detection signal (PENTOUCH) having a first level if a touch point (Q) of a touch screen assembly ( 30,31 ) including first ( 30 ) and second ( 31 ) resistive screens is detected, and generating a second level of the pen touch detection signal if a touch point is not detected. A controller ( 41 A) includes circuitry ( 58 A) that generates an interrupt signal (IRQ) to be sent to a host processor ( 3 ) in response to the first level of the pen touch detection signal and for resetting the interrupt signal (IRQ) in response to the second level of the pen touch detection signal if the second level is received before a convert command is received from the host processor. The interrupt signal (IRQ) represents an interrupt service request for a convert command from the host processor ( 3 ). Resetting of the interrupt signal (IRQ) has the effect of canceling the interrupt service request.
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