DMA Module

C H A P T E R

8

The NS7520 supports 13 DMA channels. Each channel moves blocks of data between memory and a memory peripheral. Each block transfer is defined by a descriptor of two words (memory-to-peripheral) or three words (memory-to-memory) in circular buffers maintained by the CPU. As each block transfer completes, the CPU need update only the descriptor for the completed block transfer, minimizing CPU intervention.

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Digi NS7520 manual DMA Module