Memory controller, memory system, and memory control method
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United States of America Patent
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Dec 13, 2016
Grant Date -
Sep 10, 2015
app pub date -
Jul 30, 2014
filing date -
Mar 6, 2014
priority date (Note) -
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Abstract
According to one embodiment, a memory controller includes a writing destination management unit which determines a writing destination of user data, an encoding unit which generates a parity of the user data, and an ECC management unit which measures a fatigue degree of each certain memory area of a nonvolatile memory, selects an encoding method to instruct the encoding unit to be performed according to the encoding method, and changes the encoding method to an encoding method having a high error correction capability in a case where the fatigue degree corresponding to the writing destination is equal to or higher than a threshold and a total sum of parities is equal to or less than a predetermined amount.
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