Electrically programmable semiconductor memory showing redundanc

Details Electrically programmable semiconductor memory showing redundanc Electrically programmable semiconductor memory showing redundanc

1986-04-23

1988-03-22

Atkinson, Charles E.

Excavating

365201, 371 10, G01R 3128

Patent

active

047333944

ABSTRACT:
An integrated memory system includes a microcomputer which, at defined intervals and by employing a classifying circuit integrated in an EEPROM, checks the memory cells of the EEPROM with respect to variations of the threshold values. Upon detection of a fault in a row or column which has thus been recognized as being faulty, this faulty row or column whose address is then stored in one EEPROM area, is replaced by a redundant row or column in another area by making use of a correction register.

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