PICTURE MEMORY SELECTION CIRCUIT FOR FAX

摘要

The circuit is for a facsimile with TPH (Thermal Printer Head) to enable plural video memories to be selected using CODEC address and to input same address data in each of the selected video memories. This circuit consists of a video memory (5) unit which restores video memory, a CODEC (1) which produces an address used to transfer the memory of the video memory unit, a latch unit (2) which transfers an address need for data transfer, a multiplexer (3) which inputs the signal that selects the video memory unit, outputs an address for data transfer, and makes the signal to select the video memory unit from other ouput unit, a de-multiplexer (4) which transfers the the video selection signal from the multiplexer to the video memory unit, selecting an appropirate RAM device.