Clock detecting circuit of microprocessor and MCU (micro controller unit) clock detecting circuit of DC brushless motor

Clock detecting circuit of microprocessor and MCU (micro controller unit) clock detecting circuit of DC brushless motor

  • CN 201,421,494 Y
  • Filed: 05/11/2009
  • Issued: 03/10/2010
  • Est. Priority Date: 05/11/2009
  • Status: Active Grant
First Claim
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1. microprocessor clock testing circuit, comprise microprocessor and be connected clock circuit on the microprocessor, it is characterized in that:

  • it also comprises zero cross detection circuit, the input end of zero cross detection circuit connects civil power and exchanges input, the output terminal of zero cross detection circuit connects the input end of microprocessor, in civil power exchanged the time period of two adjacent zero crossings of input, microprocessor detected the precision of microprocessor clock to counting the oscillation period of clock circuit according to count value.

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