Refresh-ahead and burst refresh preemption technique for managin

Details Refresh-ahead and burst refresh preemption technique for managin Refresh-ahead and burst refresh preemption technique for managin

1997-04-07

1999-05-25

Cabeca, John W.

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

365222, G06F 1216

Patent

active

059078570

ABSTRACT:
A computer system refreshes dynamic memory in a burst, but allows other memory access requests to preempt a burst refresh before the burst completes. In another aspect, once a burst refresh begins, it is allowed to continue for a number of refresh cycles which is greater than the number of refresh cycles then due; that is, until a time when the number of refresh cycles due is negative. This technique, referred to herein as "refresh-ahead", effectively helps to shift memory refresh activity into periods of bus time which would otherwise be idle.

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