发明名称 |
NONVOLATILE MEMORY DEVICE |
摘要 |
<p>PURPOSE:To prevent the destruction of the specific data by inhibiting the write of data into a memory area storing the specific data when a write mode is erroneously set at a nonvolatile memory which can be electrically rewritten with the malfunction of a control circuit that is caused with the ON/OFF operations of a power supply or in a transient state like an instantaneous power failure state, etc. CONSTITUTION:A memory cell array 2 includes the memory areas 2a and 2b where a start address SA and an end address EA of a specific data writing area are held. A comparator 9 compares both addresses SA and EA stored in the areas 2a and 2b with an address IA inputted for a write access and decides whether a rewritable area exists or not.</p> |
申请公布号 |
JPH0512892(A) |
申请公布日期 |
1993.01.22 |
申请号 |
JP19910164163 |
申请日期 |
1991.07.04 |
申请人 |
MITSUBISHI ELECTRIC CORP |
发明人 |
INOUE TETSUHIKO;KIJI AKIO |
分类号 |
G06F12/14;G11C16/02;G11C16/06;G11C17/00 |
主分类号 |
G06F12/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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