Cell-level statistics collection for detection and decoding in flash memories
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United States of America Patent
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Nov 22, 2016
Grant Date -
Jul 11, 2013
app pub date -
Feb 27, 2013
filing date -
Mar 14, 2011
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Abstract
Methods and apparatus are provided for collecting cell-level statistics for detection and decoding in flash memories. Data from a flash memory device is processed by obtaining one or more read values for a plurality of bits in a page of the flash memory device; and generating cell-level statistics for the flash memory device based on a probability that a data pattern was read from the plurality of bits given that a particular pattern was written to the plurality of bits. The cell-level statistics are optionally generated substantially simultaneously with a reading of the read values, for example, as part of a read scrub process. The cell-level statistics can be used to convert the read values for the plurality of bits to a reliability value for a bit among the plurality of bits.
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