Sequential chip select decode apparatus and method

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United States of America Patent

PATENT NO 4323965
SERIAL NO

06110523

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Abstract

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A memory subsystem which couples to a multiword bus for processing memory requests received therefrom includes at least a pair of independently addressable dynamic memory module units. Each memory unit includes a number of rows of random access memory (RAM) chips. The subsystem receives as part of each memory request an address, the least significant portion of which selects the row of chips to be accessed within one of the pair of memory units. Address decode circuits include gating circuits which couple to both module units. The gating circuits are interconnected so that the decoding of the least significant address bits results in the generation of a pair of row address strobe signals. These signals enable simultaneously the rows of RAM chips for access within both module units for read out of information to a multiword bus eliminating any delay in address incrementing.

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Patent Owner(s)

Patent OwnerAddress
HONEYWELL INFORMATION SYSTEMS INCPHOENIX AZ

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Johnson, Robert B Billerica, MA 35 997
Moore, Dana Dover, MA 1 74
Nibby, Jr Chester M Peabody, MA 41 1401

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