NONVOLATILE SEMICONDUCTOR STORAGE DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a nonvolatile semiconductor storage device in which reliability of a specific area can be secured.

SOLUTION: The nonvolatile semiconductor storage device includes: a memory cell array in which electrically rewritable nonvolatile memory cells are arranged; a register that holds good/bad information on the specific area that requires high reliability in the user accessible area of the memory cell array; and an address conversion circuit that performs internal address conversion control so as to internally access a backup area in the user accessible area on the basis of the good/bad information in the register when the specific area is bad and is accessed, and so as to internally access the specific area on the basis of the good/bad information in the register when the specific area is bad and the backup area is accessed.

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