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Method of achieving wear leveling in flash memory using relative grades

  • US 7,224,604 B2
  • Filed: 11/29/2005
  • Issued: 05/29/2007
  • Est. Priority Date: 03/14/2005
  • Status: Active Grant
First Claim
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1. A method of managing a memory, of a memory device, that includes a plurality of blocks, the method comprising the steps of, for each block:

  • (a) calculating a number that is a function of how many times said each block has been erased and of how many times at least one other block has been erased; and

    (b) storing said number in the memory device;

    wherein, for at least two of the blocks, said at least one other block of a first of said at least two blocks is different from said at least one other block of a second of said at least two blocks.

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