Multi-port memory device with multiple sets of columns
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United States of America Patent
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Mar 10, 1998
Grant Date -
N/A
app pub date -
Dec 6, 1996
filing date -
Feb 5, 1993
priority date (Note) -
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Abstract
A multi-port memory device includes a row-column array, a random access port, a plurality of bidirectional serial access memory (SAM) ports, and a switching network for coupling SAM ports to sets of columns. A column is defined as a number of memory cells sharing a sense amplifier. Sets of columns are defined in one rectangular region or among several rectangular regions of the array. The switching network selectively couples each SAM port with each set, each set with each other set, and each SAM port with each other SAM port. A video random access memory (VRAM) or a multi-port dynamic random access memory (DRAM) of the present invention provides increased flexibility in smaller die area.
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