Non-volatile memory device

Details Non-volatile memory device Non-volatile memory device

1988-01-25

1990-10-09

Fears, Terrell W.

Static information storage and retrieval

Powering

365227, G11C 1300, G11C 1140

Patent

active

049624849

ABSTRACT:
Non-volatile memory cells for security and a power supply voltage detection means are disposed in a non-volatile memory device. Information to be secured is stored in the security non-volatile memory cell and the output of the information to be secured which is stored in the non-volatile memory cell is inhibited by a signal from the power supply voltage detection circuit when a power supply voltage other than the rated value is applied. Accordingly, even when a power supply voltage other than the rated value is applied, the stored information of the security non-volatile memory cell can be used correctly, so that the object of improving security in the non-volatile memory device having the security function can be accomplished.

REFERENCES:
patent: 4777626 (1989-10-01), Matsushita
patent: 4814647 (1989-03-01), Tran
"On-Chip EEPROM Makes .mu.C Easy to Reprogram" from Electronic Design, Mar. 3, 1983, pp. 123-128.

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