M5L8257P-5

MITSUBISHI LSls MSL8257P-S PROGRAMMABLE DMA CONTROLLER DESCRIPTION The M5L8257P-5 is a programmable, 4-channel direct memory access (DMA) controller. It is produced using the Nch'annel silicon-gate ED-MaS process and is specifically designed to simplify data transfer at high speeds for microcomputer systems. The LSI operates on a single 5V power supply. FEATURES Single 5V supply voltage Single TTL compatible Priority DMA request logiC Channel-masking function Terminal count and Modulo 128 outputs 4-channel DMA controller Compatible with MELPS85 devices APPLICATION DMA control of peripheral equipment such as floppy disks and CRT terminals that require high-speed data transfer. PIN CONFIGURATION (TOP VIEW) INPuif8u~~t9 1/'oR - INPUV?Os;.n~ I/OW- MEMOR6u~~t9 MEMR ~ MEMOR'S~~8~ MEMW ~ 4 MARK OUTPUT MARK ~ 5 READY INPUT READY ~ 6 HOLDE~8~~2m;: HLDA ~ 7 STOROBlg8~~B¥ ADSTB ~ 8 ENABLEAg8~~~¥ AEN ~ 9 HOLD R63Y~crt HRQ ~ 10 CHIP ST~~8t CS ~ 11 CLOCK INPUT CLK ~...