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Semiconductor device

  • US 7,420,838 B2
  • Filed: 08/23/2007
  • Issued: 09/02/2008
  • Est. Priority Date: 01/05/2005
  • Status: Expired due to Fees
First Claim
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1. A semiconductor device comprising:

  • a power supply terminal;

    a plurality of bit lines;

    a plurality of source lines;

    a memory array containing a plurality of memory cells;

    a plurality of read circuits and a plurality of write circuits connected to said plurality of bit lines;

    a power supply circuit which converts power fed to said power supply terminal, and supplies said power to internal circuits; and

    a detect circuit which detects variations in power supply potential,wherein each of said plurality of memory cells has a storage element coupled to a corresponding bit line and a corresponding source line,wherein said storage element stores data according to changes in resistance and allows rewriting of the data by flowing electric current, andwherein said bit line and said source line are caused to be at a same potential when said detect circuit detects a variation in power supply potential.

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