iW-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.
Features
Compatible to 8237
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)
Two bus modes (Bus release, Bus hold)
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)
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