Semiconductor memory device

Details Semiconductor memory device Semiconductor memory device

2007-06-26

2007-06-26

Nguyen, Van Thu (Department: 2824)

Static information storage and retrieval

Read/write circuit

Bad bit

C365S230010, C365S233500

Reexamination Certificate

active

11143575

ABSTRACT:
A semiconductor memory device, wherein an access to a first memory portion is made by referring to an address transformation table stored in a second memory portion, so that an access to a defective block is prevented; the second memory portion and the first memory portion are mounted on the same semiconductor chip, so that a part or all of address data input from outside the semiconductor chip can be made corresponding to an address of the second memory portion and input to the second memory portion without executing any calculation, and a stored pointer can be taken out at a high speed; and an access can be made to a memory at a high speed by following the address transformation table.

REFERENCES:
patent: 6324104 (2001-11-01), Matsui
patent: 11-120788 (1999-04-01), None

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