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Method and device for clock calibration

  • US 7,200,507 B2
  • Filed: 12/02/2004
  • Issued: 04/03/2007
  • Est. Priority Date: 10/01/2004
  • Status: Expired due to Fees
First Claim
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1. A method for calibrating an interior clock generator installed inside a power monitoring unit of a rechargeable battery, the method comprising:

  • providing an external clock signal from an exterior clock generator installed outside the power monitoring unit;

    setting a register to output a starting signal;

    activating a calibration timer control circuit by the starting signal;

    activating a counter to count the outside clock signal, and a timer to count a internal clock signal generating from the interior clock generator simultaneously;

    stop counting the counter and the timer when a predetermined number of counts is achieved; and

    comparing a first count of the timer to the second count of the counter so as to calibrate the interior clock generator.

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