Dynamic memory system which includes apparatus for...

Details Dynamic memory system which includes apparatus for... Dynamic memory system which includes apparatus for...

G - Physics

06

F

354/241

G06F 13/00 (2006.01) G06F 13/16 (2006.01) G11C 11/406 (2006.01)

Patent

CA 1132717

ABSTRACT OF THE DISCLOSURE A memory subsystem for processing memory requests includes at least a pair of independently addressable dynamic memory module units. Each memory unit includes arrays of memory elements corresponding to a number of storage locations, separate addressing and data output circuits. The system further includes common timing, refresh and control circuits. When the memory request specifies a predetermined type of memory operation, the control circuits generate signals for refreshing a location within the memory unit from which data is not being fetched. The control circuits,upon the completion of he refresh operation, in response to another prede- termined memory request, refreshes the corresponding row within the other unit in parallel with fetching data from first unit. Upon completing refresh operations within both units, the control circuits generate a control signal for inhibiting the refresh circuits from performing a mandatory refresh operation, upon a row of memory elements within the memory units in which access to the memory system is inhibited temporarily, enabling memory operations to continue without interruption.

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