UPD8257-5 Datasheet (NEC) - PROGRAMMABLE DMA CONTROLLER

UPD8257-5, PROGRAMMABLE DMA CONTROLLER

NEe Microcomputers, Inc.

NEe JLPD8257 JLPD8257 5 PROGRAMMABLE DMA CONTROLLER DESCR IPTION The !1PD8257-5 is a programmable four-channel Direct Memory Access (DMA) controller.

It is designed to simplify high speed transfers between peripheral devices and memories.

Upon a peripheral request, the !1PD8257-5 generates a sequential memory address, thus allowing the peripheral to read or write data directly to or from memory.

Peripheral requests are prioritized within the !1PD8257-5 so that th