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 |