Status register
| PE | Parity error  |  
| FE | Framing error  |  
| NF | Noise detected flag  |  
| ORE | Overrun error  |  
| IDLE | IDLE line detected  |  
| RXNE | Read data register not empty  |  
| TC | Transmission complete  |  
| TXE | Transmit data register empty  |  
| LBD | LIN break detection flag  |