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Method and system for operating accessory controls

  • US 7,643,642 B2
  • Filed: 05/10/2004
  • Issued: 01/05/2010
  • Est. Priority Date: 05/10/2004
  • Status: Active Grant
First Claim
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1. A method for operating accessory controls, comprising the steps of:

  • at a portable electronic device, receiving an accessory;

    measuring at least one parameter generated at least in part by an identifier in the accessory; and

    in response to the measuring step, activating an audio amplifier in the portable electronic device, wherein the audio amplifier is only activated if the accessory contains more than one speaker.

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