Interrupt enable bits
| RXFIFO_FULL_INT_ENA | This is the enable bit for UART_RXFIFO_FULL_INT. |
| TXFIFO_EMPTY_INT_ENA | This is the enable bit for UART_TXFIFO_EMPTY_INT. |
| PARITY_ERR_INT_ENA | This is the enable bit for UART_PARITY_ERR_INT. |
| FRM_ERR_INT_ENA | This is the enable bit for UART_FRM_ERR_INT. |
| RXFIFO_OVF_INT_ENA | This is the enable bit for UART_RXFIFO_OVF_INT. |
| DSR_CHG_INT_ENA | This is the enable bit for UART_DSR_CHG_INT. |
| CTS_CHG_INT_ENA | This is the enable bit for UART_CTS_CHG_INT. |
| BRK_DET_INT_ENA | This is the enable bit for UART_BRK_DET_INT. |
| RXFIFO_TOUT_INT_ENA | This is the enable bit for UART_RXFIFO_TOUT_INT. |
| SW_XON_INT_ENA | This is the enable bit for UART_SW_XON_INT. |
| SW_XOFF_INT_ENA | This is the enable bit for UART_SW_XOFF_INT. |
| GLITCH_DET_INT_ENA | This is the enable bit for UART_GLITCH_DET_INT. |
| TX_BRK_DONE_INT_ENA | This is the enable bit for UART_TX_BRK_DONE_INT. |
| TX_BRK_IDLE_DONE_INT_ENA | This is the enable bit for UART_TX_BRK_IDLE_DONE_INT. |
| TX_DONE_INT_ENA | This is the enable bit for UART_TX_DONE_INT. |
| RS485_PARITY_ERR_INT_ENA | This is the enable bit for UART_RS485_PARITY_ERR_INT. |
| RS485_FRM_ERR_INT_ENA | This is the enable bit for UART_RS485_PARITY_ERR_INT. |
| RS485_CLASH_INT_ENA | This is the enable bit for UART_RS485_CLASH_INT. |
| AT_CMD_CHAR_DET_INT_ENA | This is the enable bit for UART_AT_CMD_CHAR_DET_INT. |
| WAKEUP_INT_ENA | This is the enable bit for UART_WAKEUP_INT. |