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Soft errors handling in EEPROM devices

  • US 7,548,461 B2
  • Filed: 06/22/2004
  • Issued: 06/16/2009
  • Est. Priority Date: 05/20/1992
  • Status: Expired due to Fees
First Claim
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1. A method of improving data retention in a nonvolatile writable memory having a plurality of storage elements each capable of storing at least a first and a second data state, where the memory uses a normal read value of a parameter for distinguishing between the first and the second data states, the method comprising:

  • reading a set of one or more storage elements using a first value of the parameter shifted from the normal read value;

    determining whether the set of storage elements read correctly using the first value of the parameter; and

    in response to storage elements not reading correctly using the first value of the parameter, correcting the data content of the set of data elements and rewriting the corrected data content back to the memory.

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