UM8237A-5

eUMC UM8237A/ 8237A-4/ 8237A-5 Programmable DMA Controller (DMAC) Features Enable/Disable control of individual DMA requests Four independent DMA channels Independent autoinitialization of all channels Memory-to-memory transfers Memory block initialization Single 5V power supply High performance: transfers up to 1.6M bytes/second with 5MHz 8237A-5 Directly expandable to any number of channels End of process input for terminating transfers Software DMA requests Independent Polarity control for DREQ and DACK signals Available in EXPRESS - Standard Temperature Range General Description The UM8237A Direct Memory Access Controller (DMAC) is a peripheral interface circuit for microprocessor systems. It is designed to improve system performance by allowing external devices to directly transfer information from the system memory. Memory-tb-memory' transfer capability is also provided. The LJ M8237A offers a wide variety of programmable contro...