Semiconductor memory

Details Semiconductor memory Semiconductor memory

2006-08-24

2008-12-30

Luu, Pho M. (Department: 2824)

Static information storage and retrieval

Read/write circuit

Data refresh

C365S189040, C365S191000, C365S201000

Reexamination Certificate

active

07471585

ABSTRACT:
A refresh signal is output in response to a refresh request generated at predetermined cycles, and a refresh operation is performed. The refresh operation ends when a conflict occurs between an access request and the refresh request. Consequently, an access operation corresponding to the access request can be started earlier with a reduction in access time. The access time can be reduced further by changing the end time of the refresh operation in accordance with the timing of supply of the access request. Since a test circuit for notifying the state of the refresh operation to exterior is formed, the operation margin of the refresh operation can be evaluated in a short time. As a result, it is possible to reduce the development period of the semiconductor memory.

REFERENCES:
patent: 4829484 (1989-05-01), Arimoto et al.
patent: 6324113 (2001-11-01), Tomita
patent: 7113441 (2006-09-01), Shinozaki et al.
patent: 1 061 523 (2000-12-01), None
patent: 1 150 301 (2001-10-01), None
patent: 1 235 228 (2002-08-01), None
patent: 49-46349 (1972-09-01), None
patent: 63-247995 (1988-10-01), None
patent: 63-247997 (1988-10-01), None
patent: 07-141861 (1995-06-01), None
patent: 2000-353382 (2000-12-01), None

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