Control register 2
| ADDM7 | 7-bit Address Detection/4-bit Address Detection |
| CLKEN | Clock enable |
| STOP | STOP bits |
| SWAP | Swap TX/RX pins |
| RXINV | RX pin active level inversion |
| TXINV | TX pin active level inversion |
| TAINV | Binary data inversion |
| MSBFIRST | Most significant bit first |
| ADD0_3 | Address of the USART node |
| ADD4_7 | Address of the USART node |