Semiconductor integrated circuit with nonvolatile memory

Details Semiconductor integrated circuit with nonvolatile memory Semiconductor integrated circuit with nonvolatile memory

1989-03-28

1990-04-24

Fears, Terrell W.

Static information storage and retrieval

Powering

Data preservation

36518901, 371 102, 371 13, G11C 1140

Patent

active

049205188

ABSTRACT:
A semiconductor integrated circuit with a non-volatile memory has a plurality of nonvolatile data memory elements arranged in a matrix and a means for reading data from the memory elements in accordance with an address signal which specifies a position in the matrix. A protecting data memory element for storing at least one-bit protection data is disposed in the matrix. Whether operations such as programming (i.e., writing), erasing or reading with respect to the data memory elements will be allowed or inhibited is determined in accordance with the contents of the protecting data memory element. In other words, data security in an arbitrary area of the matrix can be accomplished based on the content of the protecting data memory element.

REFERENCES:
patent: 4327410 (1982-04-01), Patez et al.
patent: 4744062 (1988-05-01), Nakamura et al.

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