8237 DMA

8237 DMA

8237 DMA Controller is a peripheral core for microprocessor systems. It controls data transfer between the main memory and the external systems with limited CPU intervention.


Xilinx Evaluation Kit

Intel Evaluation Kit

Mircochip Evaluation Kit


    • 24-bit length address register
    • 16-bit length count register
    • 4 independent DMA channels
    • 4 clock / 1 bus cycle
    • Byte transfer / word transfer selectable
    • Supports three transfer modes (Single, Demand, Block)
    • DMA request Maskable on an individual channel basis
    • Software DMA request in uPD1037 mode
    • Auto initialization function
    • Two kinds of channel priority order (Fixed & Rotating)
    • Cascading capability


  • Compatible with 8237 and uPD71071
  • The controller can improve the system performance by allowing external devices to transfer data directly to or from system memory
  • Multi-mode programmability allows the user to select from three different transfer modes

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