24.4.6 DMA Operation
A DMA operation can be initiated by setting I3CxCTRL[DMAEN] = 1.
Different DMA triggers are available, as shown below:
- TX FIFO
- RX FIFO
- Target Channel 0 TX
- Target Channel 1 TX
TX and RX FIFO triggers will be generated based on the threshold level configured in I3CxBUFTHLD (TXTHLD/RXTHLD). Target channel 0 and 1 TX triggers will be generated based on the channel selected in I3CxDMACHSEL and the threshold level configured in I3CxECRTCON[EXTTXBUFTHLD].
Note: The DMA channel that is used should be configured in I3CxCON for
the acknowledgment. The next trigger for DMA will be based on the acknowledgment
received.