Crosspoint matrix

摘要

A crosspoint matrix with integrated matte generators includes double buffered internal storage registers which may be serially loaded with mode and selection data to enable the crosspoint matrix to operate in a crosspoint mode wherein a selected input bus is directed to selected output bus. Further, the crosspoint matrix may be operated in a matte generator mode wherein the stored data is supplied to the output bus as a matte signal. The matte signal may be selectively toggled through a series of values to enable operation with both D1 and D2 signals. The data is latched in response to a vertical pulse which enables data values to be written in non-real time as a background task while the actual switch of data is accomplished only upon receipt of a vertical pulse.