1986-09-02
1987-05-19
Atkinson, Charles E.
Excavating
371 21, 371 24, G11C 2900, G06F 1100
Patent
active
046673300
ABSTRACT:
A semiconductor memory chip which has not only a memory array together with address decoding means, but also a self diagnosis means which functions to indicate a defective cell of said memory array has been found. Said self diagnosis means is mounted on the same chip as that of the memory array, and has means for storing information to be stored in the memory array, and means for comparing content of said storing means with output information which is read out of the address at which the information is stored. When the two data do not coincide with each other, an error signal indicating a defective cell in the memory array at the selected address is output.
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Atkinson Charles E.
Novack Martin M.
OKI Electric Industry Co., Ltd.
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