Semiconductor memory device including a tag memory

Details Semiconductor memory device including a tag memory Semiconductor memory device including a tag memory

1995-06-07

1998-11-24

Nguyen, Hoa T.

Excavating

371 211, 365200, 365201, G06F 1100, G06F 1116

Patent

active

058419616

ABSTRACT:
In repairing a defective memory cell of a data memory placed in a data memory region, a repairing circuit which employs a repairing method causing some access penalty but having high repairing efficiency is located in a redundant row region and a redundant column region in the data memory region. On the other hand, in repairing a defective memory cell of a tag memory placed in a tag memory region, a repairing circuit which employs a repairing method having low repairing efficiency but causing little access penalty is located in a redundant column region in the tag memory region. Accordingly, optimal repair of a defective memory cell can be achieved according to respective functions of the tag memory and the data memory.

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