MEMORY MANAGEMENT METHOD, AND MEMORY CONTROLLER AND MEMORY STORAGE DEVICE USING THE SAME
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United States of America Patent
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Issued Date -
Dec 12, 2013
app pub date -
Aug 14, 2012
filing date -
Jun 11, 2012
priority date (Note) -
Abandoned
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Abstract
A memory management method adapted to a rewritable non-volatile memory module having a plurality of physical erase units is provided. The operation mode of each physical erase unit is set to include three modes. A first mode indicates all physical program units to be programmable, a second mode and a third mode indicate upper physical program units to be non-programmable, but the third mode is unswitchable to the first or the second mode. The physical erase units are grouped into a first area and a second area. Each physical erase unit in the first area switchably operates in the first or the second mode, and each physical erase unit in the second area operates in the third mode. If a condition is satisfied, a physical erase unit in the first area is grouped to the second area. Thereby, the lifespan of the rewritable non-volatile memory module is prolonged.
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