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UM8237A-4 Datasheet Programmable Dma Controller

Manufacturer: UMC

Overview: eUMC UM8237A/ 8237A-4/ 8237A-5 Programmable DMA Controller (DMAC).

This datasheet includes multiple variants, all published together in a single manufacturer document.

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.

Key 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.

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UM8237A-4 Distributor