Flash Memory Device and Data Access Method for Same
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United States of America Patent
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Issued Date -
May 30, 2013
app pub date -
Nov 27, 2012
filing date -
Nov 30, 2011
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The invention provides a flash memory device. In one embodiment, the flash memory device is coupled to a host, and comprises a flash memory, a controller, and a random access memory. The flash memory comprises a plurality of blocks for data storage. The random access memory stores a read count table for recording read counts of the blocks. When the read counts of a plurality of original blocks are greater than a threshold according to the read count table, the controller obtains a plurality of spare blocks from the flash memory as mirror blocks respectively corresponding to the original blocks, and copies a portion of a plurality of data pages of the original blocks to the mirror blocks whenever the original blocks are read until all of the data pages of the original blocks have been copied to the mirror blocks.
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