Interrupt mask register
| MNGMNTDONE | management done interrupt mask | 
| RXCMPLT | receive complete interrupt mask | 
| RXUSEDBITREAD | receive used bit read interrupt mask | 
| TXUSEDBITREAD | transmit used bit read interrupt mask | 
| TXUNDERRUN | transmit buffer under run interrupt mask | 
| RTRYLMTORLATECOL | Retry limit exceeded or late collision (gigabit mode only) interrupt mask | 
| AMBAERR | Transmit frame corruption due to AMBA (AHB) error interrupt mask | 
| TXCMPLT | Transmit complete interrupt mask | 
| UNUSED | Unused | 
| RXOVERRUN | Receive overrun interrupt mask | 
| RESPNOTOK | bresp/hresp not OK interrupt mask | 
| NONZEROPFRMQUANT | Pause frame with non-zero pause quantum interrupt mask | 
| PAUSETIMEZERO | pause time zero interrupt mask | 
| PFRMTX | pause frame transmitted interrupt mask | 
| PTPDLYREQFRMRX | PTP delay_req frame received mask | 
| PTPSYNCFRMRX | PTP sync frame received mask | 
| PTPDLYREQFRMTX | PTP delay_req frame transmitted mask | 
| PTPSYNCFRMTX | PTP sync frame transmitted mask | 
| PTPPDLYREQFRMRX | PTP pdelay_req frame received mask | 
| PTPPDLYRESPFRMRX | PTP pdelay_resp frame received mask | 
| PTPPDLYREQFRMTX | PTP pdelay_req frame transmitted mask | 
| PTPPDLYRESPFRMTX | PTP pdelay_resp frame transmitted mask | 
| TSUSECREGINCR | TSU seconds register increment mask | 
| RXLPIINDC | RX LPI indication mask | 
| WOLEVNTRX | WOL event received mask | 
| TSUTIMERCOMP | TSU timer comparison interrupt mask. |