Self-refresh system and method for dynamic random access memory

Details Self-refresh system and method for dynamic random access memory Self-refresh system and method for dynamic random access memory

2007-06-12

2007-06-12

Song, Jasmine (Department: 2188)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

C711S105000, C365S222000

Reexamination Certificate

active

10663151

ABSTRACT:
A system and method are provided for reducing a rate for refreshing a portion of a dynamic random access memory (DRAM). The method includes storing a information for distinguishing between a first portion of a DRAM requiring refresh at a first rate and a second portion of said DRAM permitting refresh at a second rate lower than the first rate. The stored information is then accessed to refresh the first portion of the DRAM at the first rate and to refresh the second portion at the second rate. The information can be generated from post-fabrication stress testing such that most of the DRAM can be refreshed at the lower rate and only the portion requiring more frequent refresh is refreshed at the higher rate.

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“McGraw-Hill Dictionary of Scientific and Technical Terms,” Fourth Edition, 1989, p. 1837.

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