Memory refresh method and system

Details Memory refresh method and system Memory refresh method and system

2007-09-24

2009-08-25

Dinh, Son (Department: 2824)

Static information storage and retrieval

Read/write circuit

Data refresh

C365S189050

Reexamination Certificate

active

07580309

ABSTRACT:
A memory refresh method applicable in a system memory is disclosed. The memory system comprises a plurality of memory ranks. It is to determine whether an access request corresponds to the memory rank, and an idle auto-refresh number of the memory rank is calculated if there is no access request corresponds to the memory rank. The memory rank is switched from an auto-refresh mode to a self-refresh mode when the idle auto-refresh number of the memory rank reaches a predetermined value.

REFERENCES:
patent: 6226709 (2001-05-01), Goodwin et al.
patent: 6741515 (2004-05-01), Lazar et al.
patent: 6795362 (2004-09-01), Nakai et al.
patent: 2005/0235100 (2005-10-01), Sakurai
patent: 2002230970 (2002-08-01), None
CN Office Action mailed Nov. 21, 2008.
English Translation of JP2002230970.

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