Channel status register
| TI | Transmit Interrupt |
| TPS | Transmit Process Stopped |
| TBU | Transmit Buffer Unavailable |
| RI | Receive Interrupt |
| RBU | Receive Buffer Unavailable |
| RPS | Receive Process Stopped |
| RWT | Receive Watchdog Timeout |
| ET | Early Transmit Interrupt |
| ER | Early Receive Interrupt |
| FBE | Fatal Bus Error |
| CDE | Context Descriptor Error |
| AIS | Abnormal Interrupt Summary |
| NIS | Normal Interrupt Summary |
| TEB | Tx DMA Error Bits |
| REB | Rx DMA Error Bits |