Figure 24-68 shows DMA reception.
- Enable the reception.
- Received data are put in the RX FIFO.
- Data are transferred from the RX FIFO to the device memory by the DMA:
- At each received byte, the RX FIFO trigger level (one character) is reached and a DMA request is generated.
- An element (1 byte) is transferred from the RX FIFO to the SDRAM at each DMA request (DMA element synchronization).
- The end of the reception is signaled by the EOF interrupt.