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System, controller, software and method for protecting against overheating of a CPU

  • US 20040088593A1
  • Filed: 06/13/2003
  • Published: 05/06/2004
  • Est. Priority Date: 11/04/2002
  • Status: Active Grant
First Claim
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1. A system for protecting against overheating of a CPU when an operation frequency is changed in accordance with a voltage variation of driving power, comprising:

  • a CPU temperature sensor to detect a temperature of the CPU;

    a reference temperature sensor to detect a temperature of a circuit block heated due to the operation frequency of the CPU;

    a comparing part to output a signal of a higher temperature value obtained by comparing temperature values detected by the CPU temperature sensor and the reference temperature sensor; and

    a CPU power supply to supply a stepwise decreasing driving power to decrease the operation frequency of the CPU in a stepwise fashion when the temperature value increases based on the signal for the higher temperature value outputted from the comparing part.

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