Interrupt Status Flags.
| FRAME | FLAG for RX Frame Error Interrupt. 1 (active): Frame Error interrupt active. |
| PARITY | FLAG for RX Parity Error interrupt. 1 (active): Receive parity error interrupt active. |
| CTS_CHANGE | FLAG for CTS signal change interrupt. 1 (active): CTS State change interrupt active. |
| RX_OVR | FLAG for RX FIFO Overrun interrupt. 1 (active): RX Overrun interrupt active. |
| RX_FIFO_LVL | FLAG for interrupt when RX FIFO reaches the number of bytes configured by the RXTHD field. 1 (active): RX FIFO Threshold level interrupt active. |
| TX_FIFO_AE | FLAG for interrupt when TX FIFO has only one byte remaining. 1 (active): TX FIFO one byte remaining interrupt active. |
| TX_FIFO_LVL | FLAG for interrupt when TX FIFO reaches the number of bytes configured by the TXTHD field. 1 (active): TX FIFO threshold level interrupt active. |
| BREAK | FLAG for received BREAK character interrupt. 1 (active): Break character received interrupt active. |
| RX_TO | FLAG for RX Timeout Interrupt. Trigger if there is no RX communication during n UART characters (n=UART_CN.RXTO). 1 (active): Receive timeout expired interrupt active. |
| LAST_BREAK | FLAG for Last break character interrupt. 1 (active): Last break character received interrupt active. |