Dual port video memory system having semi-synchronous data input

Details Dual port video memory system having semi-synchronous data input Dual port video memory system having semi-synchronous data input

1987-01-30

1988-12-06

Shaw, Gareth D.

Boots, shoes, and leggings

365189, G11C 700, G06F 1200

Patent

active

047899603

ABSTRACT:
A dual port video memory system includes a serial-to-parallel converter coupled to the input data port and a parallel-to-serial converter coupled to the output data port. Four-bit pixel values are clocked into the serial-to-parallel converter synchronous with an input clock signal and are provided by the parallel-to-serial converter synchronous with an output clock signal. The input and output clock signals may have different frequencies, but the negative-going edges of each of these clock signals are synchronized to the negative-going edges of a master clock signal.

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