Dual port video random access memory with block write capability
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United States of America Patent
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Nov 15, 1994
Grant Date -
N/A
app pub date -
May 1, 1992
filing date -
Jan 10, 1992
priority date (Note) -
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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.
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