Systems for and methods of extending lifetime of non-volatile memory
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United States of America Patent
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Apr 25, 2017
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app pub date -
Sep 28, 2012
filing date -
Sep 28, 2012
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Abstract
Systems and Methods are provided for increasing the number of writes to a page of non-volatile memory before the page must be erased. According to an embodiment, instead of writing a dataword directly to memory, a codeword is written to the memory location. The codeword is selected to minimize overwrite (e.g., bit-flipping) and to maximize the spread of wear across memory cells. In accordance with various embodiments of the invention, coset coding is integrated with error correction encoding; and once the previous state of a page is determined, a coset representative is selected on the basis of maximizing the number of writes to the page before erasing.
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