Static information storage and retrieval – Read/write circuit – Data refresh
Patent
1993-05-07
1999-09-28
Lane, Jack A.
Static information storage and retrieval
Read/write circuit
Data refresh
365222, 36523003, 711 5, 711106, G11C 700
Patent
active
059599235
ABSTRACT:
A digital computer which includes a memory refresh system for controlling the generation and sequencing of refresh signals to a memory subsystem comprised of at least one memory unit having a plurality of slots each capable of receiving a dynamic random access memory bank therein. The memory refresh system includes means for generating refresh signals and at least one independent refresh sequence controller for efficiently controlling the sequence in which the memory banks associated with a particular refresh sequence controller receive refresh signals. Each refresh sequence controller controls a combination of multi-stage shift registers for issuing refresh signals to memory banks installed on the corresponding memory unit and multi-stage shift registers for providing wait cycles during which refresh signals are being generated by other independent refresh sequence controllers. The order of refresh signals generated by each refresh sequence controller varies depending on the configuration of the memory subsystem.
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Longwell Michael L.
Matteson Keith D.
Parks Terry J.
Dell USA L.P.
Lane Jack A.
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