a8237

`a8237 MegaCore function implementing a programmable direct memory access (DMA) controller
`Optimized for FLEX^®architecture
`Provides four independent channels
`Offers static read/write or handshaking modes
`Includes direct bit set/reset capability
`Uses approximately 1,201 FLEX logic elements (LEs)
`Functionally based on the Intel 8237A and Harris 82C37A devices,except as noted in "Variations & Clarifications" on page 24

The a8237 MegaCore function implements a programmable DMA controller, which controls memory-to-peripheral and memory-tomemory data transfers and provides block memory initialization capability. Four independently programmable channels are available in the a8237 , and DMA requests can be made via hardware or software.