| 摘要 |
Disclosed herein is a memory device which comprises a nonvolatile memory having first and second areas and a controller that stores backup data along with checksum data alternately in the first and second areas. In the first and second areas, data storing areas and checksum areas are respectively provided. The highest bit of checksum data stored in each of the checksum areas is used as the bit based on which the latest updated side is recognized.
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