| 摘要 |
A semiconductor storage device having a security function for imposing limitation on data rewriting includes: at least one non-volatile memory cell array block which is capable of receiving concurrent electrical erasure; at least one memory region, each one of said at least one memory region being provided in the at least one memory cell array block, for storing a security release key; at least one non-volatile storage means for storing a security registration lock corresponding to each of the at least one memory cell array block; a determination circuit for generating a security release signal using the security release key and the security registration lock; and a memory cell array data output switching circuit for outputting security released data externally.
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