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Battery type sensing method and device for sensing battery type

  • US 8,212,517 B2
  • Filed: 01/07/2008
  • Issued: 07/03/2012
  • Est. Priority Date: 01/07/2008
  • Status: Active Grant
First Claim
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1. A method of detecting a battery type, comprising:

  • receiving a signal of a waveform that has high and low logic levels and transitions between the high and low logic levels from a battery module in a portable computing device;

    determining if the signal is in a first state which is one of the high and low logic levels for at least a first predetermined time before transitioning to a second state which is the other of the high and low logic levels;

    determining if the signal transitions from the second state to the first state after a second predetermined time, and identifying the battery type in response thereto; and

    asserting an indication of the battery type when a third predetermined time period after the transition from the second state to the first state has occurred.

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