Intermediate size non-volatile electrically alterable semiconduc

Details Intermediate size non-volatile electrically alterable semiconduc Intermediate size non-volatile electrically alterable semiconduc

1996-10-10

1998-06-09

Nelms, David C.

Static information storage and retrieval

Addressing

Particular decoder or driver circuit

365 51, 36518522, G11C 800

Patent

active

057645868

ABSTRACT:
A semiconductor memory device that operates as a normal memory device as long as existing memory is being addressed, but appears to external hardware and software to have a larger size (or standard size) memory array than is actually present in the semiconductor memory device is disclosed. To external hardware and software, the semiconductor memory device operates as if it has more addressable memory cells than in fact actually exist in the memory array. When addressing missing memory cells, the semiconductor memory device emulates or mimics their presence for the benefit of the external hardware or software. Preferably, the semiconductor memory device is a non-volatile electrically alterable semiconductor memory device. A method for emulating missing memory cells is also disclosed.

REFERENCES:
patent: 5400293 (1995-03-01), Iguchi et al.
patent: 5517630 (1996-05-01), Tasaki
patent: 5590071 (1996-12-01), Kolor et al.

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