FIFO CIRCUIT FOR MONITOR

摘要

The circuit supports the page mode method with 16 colors and refreshes the monitor after reading 4 bytes data from memory. A buffer (1) stores 4 bytes data applied from memory with 4 plans, and transmits the data to a buffer (2) according to activation of a page end signal. The transmitted data in a buffer (2) is reorganized by a combination of each bit in the data to represent 16 colors and the reorganized data is stored into 1 port CMOS SRAM (9). The 16 bits data of the SRAM is transmitted to a buffer (10) by activation of display area, and the buffer (10) outputs 4 bits data according to a video clock.