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ELECTRONIC DEVICE AND CONTROL METHOD THEREOF

  • US 20120212447A1
  • Filed: 08/18/2011
  • Published: 08/23/2012
  • Est. Priority Date: 08/19/2010
  • Status: Active Grant
First Claim
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1. An electronic device, comprising:

  • a sensing unit for sensing whether receiving a touch from an object;

    a charge-and-discharge circuit coupled to the sensing unit, wherein the charge-and-discharge circuit and the sensing unit are charged and discharged periodically according to a plurality of periodic pulses and output a sensing voltage; and

    a processing circuit coupled to the sensing unit and the charge-and-discharge circuit, comprising;

    a control unit for providing the periodic pulses to the sensing unit and the charge-and-discharge circuit;

    a detecting unit for detecting the sensing voltage and deciding a charging time according to the sensing voltage, wherein the charging time is a time at which the sensing voltage reaches a predetermined voltage;

    a determining unit coupled to the detecting unit for deciding whether to trigger an interrupt request according to the charging time; and

    an executing unit coupled to the determining unit for executing a specific application when the interrupt request is received.

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