UPD8257-5 Description
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.