Control Register
| RSTRX | Reset Receiver |
| RSTTX | Reset Transmitter |
| RXEN | Receiver Enable |
| RXDIS | Receiver Disable |
| TXEN | Transmitter Enable |
| TXDIS | Transmitter Disable |
| RSTSTA | Reset Status Bits |
| STTBRK | Start Break |
| STPBRK | Stop Break |
| STTTO | Clear TIMEOUT Flag and Start Timeout After Next Character Received |
| SENDA | Send Address |
| RSTIT | Reset Iterations |
| RSTNACK | Reset Non Acknowledge |
| RETTO | Start Timeout Immediately |
| DTREN | Data Terminal Ready Enable |
| DTRDIS | Data Terminal Ready Disable |
| RTSEN | Request to Send Enable |
| RTSDIS | Request to Send Disable |