Semiconductor memory device capable of block writing in large bu

Details Semiconductor memory device capable of block writing in large bu Semiconductor memory device capable of block writing in large bu

1998-07-02

1999-07-27

Nelms, David

Static information storage and retrieval

Addressing

Plural blocks or banks

36518901, 36523001, G11C 800

Patent

active

059301945

ABSTRACT:
Columns included in a sub-block are divided into first and second groups. If a defective memory cell column is present in the first group, an address comparison circuit activates a signal to select a redundant memory cell column, then selection prohibiting signal attains an "L" level based on information programmed in a programming circuit, a selection of a column in the first group is prohibited, and a redundant memory cell column selection signal is activated. Meanwhile, a normal selecting operation is performed to the second column group.

REFERENCES:
patent: 5293348 (1994-03-01), Abe
patent: 5416740 (1995-05-01), Fujita et al.
patent: 5422850 (1995-06-01), Sukegawa et al.
patent: 5546350 (1996-08-01), Gillingham
"A Multimedia 32b RISC Microprocessor with 16Mb DRAM", Shimizu et al., 1996 IEEE International Solid-State Circuits Conference, 1996 Digest of Technical Papers, ISSCC96/Session 13/Microprocessors/Paper 13.4, pp. 216-217.

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