| 摘要 |
A semiconductor memory information storage apparatus includes a storage unit (1) using a nonvolatile memory (11~13), a write number managing unit (42) counting each of numbers of times of writing of all blocks, a list managing unit (42) classifying the blocks in the nonvolatile memory by in-use/unused, managing in an in-use list (412) a block of the in-use, managing in a first unused list (413) a block with the number of times of writing equal to a maximum value, and managing in a second unused list (414) a block with the number of times of writing less than the maximum value, and a controller (3) writing and erasing information data to and from the storage unit.
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