Controller Error and Warning Register.
| NACK | I3C or I2C mode address emitted by the IP was NACKed by the targets. |
| TX_ABT | Write aborted due to data NACK. |
| RX_TERM | Controller terminated read in messaage mode. |
| HDR_PAR | HDR Parity Error. |
| HDR_CRC | HDR-DDR CRC Error. |
| RX_UNR | Read data underrun. |
| TX_OVR | Write data overrun. |
| MSG | Message mode error. |
| INV_REQ | Invalid use of request from CTRL register. |
| TO | Timeout error. |