CONTROL METHOD FOR NONVOLATILE MEMORY DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a control method for an indirectly addressing type nonvolatile memory device quickly producing an address conversion table and an erasure management table in time of initialization.

SOLUTION: This control method for the indirectly addressing type nonvolatile memory device has: a registration step for registering an invalid physical block written with invalid data or written with valid data and related to no logical address, and an erasure-completed block, into the erasure management table as an erasure-completed block, and producing the first address conversion table wherein a plurality of logical addresses are assigned to one physical address at initialization; a decision step for extracting the erasure-completed block from the erasure management table and deciding whether the erasure-completed block is actually erased or not in data writing; an erasure step for erasing the block for non-erasure in the decision step; and a writing step for writing data after the erasure step.

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