Interrupt status register
| MNGMNTDONE | Management frame sent | 
| RXCMPLT | Receive complete | 
| RXUSEDBITREAD | RX used bit read | 
| TXUSEDBITREAD | TX used bit read | 
| TXUNDERRUN | Transmit under run | 
| RTRYLMTORLATECOL | Retry limit exceeded or late collision | 
| AMBAERR | Transmit frame corruption due to AMBA (AHB) error. | 
| TXCMPLT | Transmit complete | 
| RXOVERRUN | Receive overrun | 
| RESPNOTOK | Hresp not OK | 
| NONZEROPFRMQUANT | Pause frame with non-zero pause quantum received | 
| PAUSETIMEZERO | Pause Time zero | 
| PFRMTX | Pause frame transmitted | 
| PTPDLYREQFRMRX | PTP delay_req frame received | 
| PTPSYNCFRMRX | PTP sync frame received | 
| PTPDLYREQFRMTX | PTP delay_req frame transmitted | 
| PTPSYNCFRMTX | PTP sync frame transmitted | 
| PTPPDLYREQFRMRX | PTP pdelay_req frame received | 
| PTPPDLYRESPFRMRX | PTP pdelay_resp frame received | 
| PTPPDLYREQFRMTX | PTP pdelay_req frame transmitted | 
| PTPPDLYRESPFRMTX | PTP pdelay_resp frame transmitted | 
| TSUSECREGINCR | TSU seconds register increment | 
| RXLPIINDC | Receive LPI indication status bit change | 
| WOLEVNTRX | WOL event received interrupt. | 
| TSUTIMERCOMP | TSU timer comparison interrupt. |