Programmable read only memory device having test tool for error

Details Programmable read only memory device having test tool for error Programmable read only memory device having test tool for error

1992-03-27

1995-02-21

Envall, Jr., Roy N.

Excavating

371 371, G06F 1110

Patent

active

053923014

ABSTRACT:
A programmable read only memory device comprises a first memory unit for data codes, a second memory unit for parity codes, and an error checking and correction unit for retrieving an original data code from the data code and the associated parity code, wherein a test data code and an improper or proper parity code is supplied from a test data register to the error checking and correction unit so that not only the data checking circuit but also the data correction circuit are examined to see if or not any trouble takes place therein.

REFERENCES:
patent: 4878220 (1989-10-01), Hashimoto
patent: 5056089 (1991-10-01), Furuta et al.

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