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Methods of end of life calculation for non-volatile memories

  • US 7,523,013 B2
  • Filed: 05/15/2006
  • Issued: 04/21/2009
  • Est. Priority Date: 05/15/2006
  • Status: Active Grant
First Claim
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1. A method of operating a memory system having a plurality of rewritable memory cells, comprising:

  • operating the memory system over a period of time;

    maintaining a parameter indicative of the number of rewrites the memory cells undergo during said period of time;

    providing an indication of the expected amount of remaining lifetime of the memory system based on the value of said parameter indicative of the number of rewrites the memory cells;

    subsequent to providing said indication of the expected amount of remaining lifetime, further operating the memory system;

    monitoring the usage pattern of the memory system during said further operating the memory system; and

    adjusting the expected amount of remaining lifetime of the memory system based on said usage pattern.

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