Apparatus for scheduling memory refresh operations including power states

Apparatus for scheduling memory refresh operations including power states

A method for performing refresh operations on a rank of memory devices is disclosed. After the completion of a memory operation, a determination is made whether or not a refresh backlog count value is less than a predetermined value and the rank of memory devices is being powered down. If the refres...

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Hauptverfasser: BRITTAIN MARK A, STUECHELI JEFFREY A, GOODMAN BENJIMAN L, DODSON JOHN STEVEN, POWELL STEPHEN J
Format: Patent
Sprache:eng
Schlagworte:
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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creator BRITTAIN MARK A
STUECHELI JEFFREY A
GOODMAN BENJIMAN L
DODSON JOHN STEVEN
POWELL STEPHEN J
description A method for performing refresh operations on a rank of memory devices is disclosed. After the completion of a memory operation, a determination is made whether or not a refresh backlog count value is less than a predetermined value and the rank of memory devices is being powered down. If the refresh backlog count value is less than the predetermined value and the rank of memory devices is being powered down, an Idle Count threshold value is set to a maximum value such that a refresh operation will be performed after a maximum delay time. If the refresh backlog count value is not less than the predetermined value or the rank of memory devices is not in a powered down state, the Idle Count threshold value is set based on the slope of an Idle Delay Function such that a refresh operation will be performed accordingly.
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subjects CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
title Apparatus for scheduling memory refresh operations including power states
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