Rainbow Electronics AT91CAP9S250A - Manual (Page 277)

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6264A–CAP–21-May-07
AT91CAP9S500A/AT91CAP9S250A
26. DMA Controller (DMAC)
26.1 Description
The DMA Controller (DMAC) is an AHB-central DMA controller core that transfers data from a
source peripheral to a destination peripheral over one or more AMBA buses. One channel is
required for each source/destination pair. In the most basic configuration, the DMAC has one
master interface and one channel. The master interface reads the data from a source and writes
it to a destination. Two AMBA transfers are required for each DMAC data transfer. This is also
known as a dual-access transfer.
The DMAC is programmed via the APB interface.