| 摘要 |
An interface device for converting the format of an input signal comprises a data input circuit (5); a random access memory (16) to store temporarily data sent from the data input circuit; a data output circuit (22); a memory write address counter (13); a clock generation circuit (25) for generating a read clock signal which operates asynchronously with a clock signal of the write address counter; a read address counter (27) clocked by the read clock signal; and a read/write control circuit (17) to select and switch a memory read operation and a memory write operation in a time sharing manner in synchronism with the shorter of the read and write clock cycles. The transfer rate of the read out signal is thus not limited by that of the input signal. The format conversion may be from that of a CRT video signal to that of an LCD, plasma, or electro-luminescent display device signal or a printer signal. <IMAGE> |
