| 摘要 |
PROBLEM TO BE SOLVED: To achieve effective leveling related with a non-volatile semiconductor memory. SOLUTION: In a storage device 6, a microprocessor 11 exchanges an alternate block whose rewrite frequency is prescribed frequency (for example, 90,000 times) or more in a semiconductor memory 2 with a data block whose non-rewrite time until that point of time is longer than a predetermined time among data blocks. Thus, it is possible to level the rewrite frequency of each block. That is, it is possible to achieve more effective standardization. COPYRIGHT: (C)2010,JPO&INPIT
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