4.7.1. DMAC flow control

In DMAC flow control mode, the SMDMAC is programmed with the amount of data that is to be transferred and requires only request signals from the peripheral to show that its buffer is ready for access. Each channel requires three signals, DMASREQ, DMABREQ, and DMACLR, see ARM PrimeCell Single Master DMA Controller (PL081) Technical Reference Manual (DDI 0218) for details.

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