Control register 2
| IDL | bit 3-0 for usart identification |
| IDBN | Identification bit num |
| BFBN | Break frame bit num |
| BFIEN | Break frame interrupt enable |
| LBCP | Last bit clock pulse |
| CLKPHA | Clock phase |
| CLKPOL | Clock polarity |
| CLKEN | Clock enable |
| STOPBN | STOP bit num |
| LINEN | LIN mode enable |
| TRPSWAP | Transmit receive pin swap |
| RXREV | RX polarity reverse |
| TXREV | TX polarity reverse |
| DTREV | DT register polarity reverse |
| MTF | MSB transmit first |
| IDH | bit 7-4 for usart identification |