Data protection circuit for semiconductor memory device

Details Data protection circuit for semiconductor memory device Data protection circuit for semiconductor memory device

1998-09-03

2000-08-08

Lane, Jack A.

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

711211, 713200, 36523002, 365195, G06F 1214

Patent

active

061015873

ABSTRACT:
A data protection circuit is provided in a semiconductor memory device equipped with a row address decoder decoding a row address signal and selecting a word line, a column address decoder decoding a column address signal and selecting a bit line, and a memory cell array writing and reading to and from a memory cell in accordance with data selection signals outputted respectively from the row address decoder and the column address decoder. The data protection circuit includes an address conversion unit for executing a program in accordance with a user's program so as to output a stored data value, converting an externally applied address signal in accordance with the stored data value, and outputting the converted address signal, and an address selection unit for comparing the stored data value inputted from the address conversion unit with a user data value, and selectively outputting the converted address signal inputted from the address conversion unit or the externally applied address signal in accordance with the compared resultant value.

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