36.6.4.1.1 Client DMA

When using the I²C client with DMA, an address match will cause the address interrupt flag (INTFLAG.ADDRMATCH) to be raised. After the interrupt has been serviced, data transfer will be performed through DMA.

The I²C client generates the following requests:

• Write data received (RX): If the FIFO is disabled, the request is set when host write data is received. If the FIFO is enabled, the request is set when the RX FIFO threshold is reached (CTRLC.RXTRHOLD). The request is cleared when DATA is read.
• Read data needed for transmit (TX): If the FIFO is disabled, the request is set when data is needed for a host read operation. If the FIFO is enabled, the request is set when the TX FIFO threshold is reached (CTRLC.TXTRHOLD). The request is cleared when DATA is written.