Status register
| RXNE | Read data register not empty |
| CSRNE | Control Buffer register is not empty |
| PERR | Parity error |
| OVR | Overrun error |
| SBD | Synchronization Block Detected |
| SYNCD | Synchronization Done |
| FERR | Framing error |
| SERR | Synchronization error |
| TERR | Time-out error |
| WIDTH5 | Duration of 5 symbols counted with SPDIF_CLK |