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| PARITY | This register is used to configure the parity check mode. |
| PARITY_EN | Set this bit to enable uart parity check. |
| BIT_NUM | This register is used to set the length of data. |
| STOP_BIT_NUM | This register is used to set the length of stop bit. |
| SW_RTS | This register is used to configure the software rts signal which is used in software flow control. |
| SW_DTR | This register is used to configure the software dtr signal which is used in software flow control. |
| TXD_BRK | Set this bit to enbale transmitter to send NULL when the process of sending data is done. |
| IRDA_DPLX | Set this bit to enable IrDA loopback mode. |
| IRDA_TX_EN | This is the start enable bit for IrDA transmitter. |
| IRDA_WCTL | 1’h1: The IrDA transmitter’s 11th bit is the same as 10th bit. 1’h0: Set IrDA transmitter’s 11th bit to 0. |
| IRDA_TX_INV | Set this bit to invert the level of IrDA transmitter. |
| IRDA_RX_INV | Set this bit to invert the level of IrDA receiver. |
| LOOPBACK | Set this bit to enable uart loopback test mode. |
| TX_FLOW_EN | Set this bit to enable flow control function for transmitter. |
| IRDA_EN | Set this bit to enable IrDA protocol. |
| RXFIFO_RST | Set this bit to reset the uart receive-FIFO. |
| TXFIFO_RST | Set this bit to reset the uart transmit-FIFO. |
| RXD_INV | Set this bit to inverse the level value of uart rxd signal. |
| CTS_INV | Set this bit to inverse the level value of uart cts signal. |
| DSR_INV | Set this bit to inverse the level value of uart dsr signal. |
| TXD_INV | Set this bit to inverse the level value of uart txd signal. |
| RTS_INV | Set this bit to inverse the level value of uart rts signal. |
| DTR_INV | Set this bit to inverse the level value of uart dtr signal. |
| CLK_EN | 1’h1: Force clock on for register. 1’h0: Support clock only when application writes registers. |
| ERR_WR_MASK | 1’h1: Receiver stops storing data into FIFO when data is wrong. 1’h0: Receiver stores the data even if the received data is wrong. |
| AUTOBAUD_EN | This is the enable bit for detecting baudrate. |
| MEM_CLK_EN | UART memory clock gate enable signal. |