DMA Control Register, UARTDMACR
| RXDMAE | Receive DMA enable. If this bit is set to 1, DMA for the receive FIFO is enabled. |
| TXDMAE | Transmit DMA enable. If this bit is set to 1, DMA for the transmit FIFO is enabled. |
| DMAONERR | DMA on error. If this bit is set to 1, the DMA receive request outputs, UARTRXDMASREQ or UARTRXDMABREQ, are disabled when the UART error interrupt is asserted. |