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Electronic apparatus and system with multi-purpose interface

  • US 7,184,794 B2
  • Filed: 09/09/2004
  • Issued: 02/27/2007
  • Est. Priority Date: 09/09/2004
  • Status: Active Grant
First Claim
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1. An electronic apparatus comprising:

  • one or more electrical circuits adapted to selectively generate a first digital message signal and a first analog audio signal;

    a connector for coupling said first digital message signal and said first analog audio signal to an external device, said connector comprises a first contact and a second contact, wherein said first contact is coupled to said one or more electrical circuits and is adapted to carry said first digital message signal and said first analog audio signal; and

    a driver coupled to said second contact, wherein said driver is adapted to change a signal level on said second contact in order to signal a first transition between a first mode in which said first digital message signal is generated and coupled through said connector to said external device, and a second mode in which said first analog audio signal is generated and coupled through said connector to said external device.

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