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 |
| RIIC | Ring Indicator Input Change Flag |
| DSRIC | Data Set Ready Input Change Flag |
| DCDIC | Data Carrier Detect Input Change Flag |
| CTSIC | Clear to Send Input Change Flag |
| RI | Image of RI Input |
| DSR | Image of DSR Input |
| DCD | Image of DCD Input |
| CTS | Image of CTS Input |
| MANERR | Manchester Error |