Converting circuit for preventing wrong error correction codes from occurring due to an error correction rule during data reading operation
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United States of America Patent
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Aug 28, 2007
Grant Date -
Feb 9, 2006
app pub date -
Aug 9, 2004
filing date -
Aug 9, 2004
priority date (Note) -
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status (Latency Note)
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Abstract
A converting circuit, for preventing wrong error correction code from occurring due to an error correction rule during data reading operation is provided. When the flash memory controller writes all 0xFF data into the flash memory, the byte error correction rule generates a set of correct error correction codes and the error correction code converting circuit converts the set of correct error correction codes into 0xFF error correction codes, and values stored in the data area and error correction code area of the flash memory are converted into 0xFF to prevent wrong error correction code from occurring during data reading operation when the error correction codes are not completely 0xFF.
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