Dma Controller; Overview - Samsung S3C2416 User Manual

S3C2416X RISC MICROPROCESSOR

DMA CONTROLLER

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DMA CONTROLLER

1 OVERVIEW

S3C2416 supports six-channel DMA (Bridge DMA or peripheral DMA) controller that is located between the
system bus and the peripheral bus. Each channel of DMA controller can perform data movements between
devices in the system bus and/or peripheral bus with no restrictions. In other words, each channel can handle the
following four cases: 1) both source and destination are in the system bus, 2) source is in the system bus while
destination is in the peripheral bus, 3) source is in the peripheral bus while destination is in the system bus, 4)
both source and destination are in the peripheral bus.
The main advantage of DMA is that it can transfer the data without CPU intervention. The operation of DMA can
be initiated by S/W, or the request from internal peripherals, or the external request pins.
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