Channel Status Register
| RXRDY | Receiver Ready |
| TXRDY | Transmitter Ready |
| RXBRK | Break Received/End of Break |
| ENDRX | End of Receiver Transfer |
| ENDTX | End of Transmitter Transfer |
| OVRE | Overrun Error |
| FRAME | Framing Error |
| PARE | Parity Error |
| TIMEOUT | Receiver Time-out |
| TXEMPTY | Transmitter Empty |
| ITER | Max number of Repetitions Reached |
| TXBUFE | Transmission Buffer Empty |
| RXBUFF | Reception Buffer Full |
| NACK | Non AcknowledgeInterrupt |
| CTSIC | Clear to Send Input Change Flag |
| CTS | Image of CTS Input |