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Semiconductor device, radio communication terminal using same, and clock frequency control method

  • US 9,195,260 B2
  • Filed: 12/22/2014
  • Issued: 11/24/2015
  • Est. Priority Date: 07/06/2011
  • Status: Active Grant
First Claim
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1. A semiconductor device comprising:

  • a clock generation circuit that generates a clock signal;

    an arithmetic circuit that operates according to the clock signal;

    a storage circuit that is activated according to access from the arithmetic circuit;

    a memory access detection unit that detects a number of accesses from the arithmetic circuit to the storage circuit and applies a weight to the number of accesses; and

    a clock control circuit that lowers the frequency of the clock signal when a variation of the weighted number of accesses exceeds a variation threshold.

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