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SOFT-DECISION COMPENSATION FOR FLASH CHANNEL VARIATION

  • US 20150169402A1
  • Filed: 10/06/2014
  • Published: 06/18/2015
  • Est. Priority Date: 08/04/2012
  • Status: Active Grant
First Claim
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1. A method, comprising:

  • performing an initial read and an initial attempted ECC decoding, for each of a plurality of flash memory locations;

    performing up to a first plurality of ECC soft-decision redecoding attempts based on the initial read, subsequent to failure of the initial attempted ECC decoding, for at least some of the locations; and

    wherein each ECC soft-decision redecoding attempt uses a selected one of a plurality of log likelihood ratio (LLR) soft-decision information sets corresponding to a respective one of a plurality of read-equilibrium points.

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