Dual port video random access memory with block write capability

Details Dual port video random access memory with block write capability Dual port video random access memory with block write capability

1992-05-01

1994-11-15

LaRoche, Eugene R.

Static information storage and retrieval

Addressing

Plural blocks or banks

36523002, 36518902, 36523006, 3652385, G11C 800, G11C 804

Patent

active

053654897

ABSTRACT:
A dual port video random access memory device operates as a dual port by adding a serial access memory portion to a dynamic random access memory portion. A block write function can be selectively performed by multiplexing either a decoded signal corresponding to the two least significant bits of a column address or a 4 bit data input. An improved memory device construction is taught which reduces the total number of transistors necessary to perform the dual port function of prior art memory devices. As a result, chip layout and chip miniaturization can be realized.

REFERENCES:
patent: 4807189 (1989-02-01), Pinkham et al.
patent: 4961171 (1990-10-01), Pinkham et al.
patent: 5208775 (1993-05-01), Lee

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