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Semiconductor integrated circuit comprising functional modes

  • US 20040032915A1
  • Filed: 08/06/2003
  • Published: 02/19/2004
  • Est. Priority Date: 08/13/2002
  • Status: Active Grant
First Claim
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1. An integrated circuit device comprising a pin for receiving a direct current voltage component signal, the device comprising:

  • a signal source for applying an alternating current signal to the pin;

    a buffer for converting the alternating current signal into a digital signal; and

    a digital detector for detecting a frequency of the digital signal and outputting a predetermined detection signal.

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