Interrupt Mask
| MODEMFAILMASK | Mode M Failure Mask | 
| UNDERFLOWDETMASK | Underflow Detected Mask | 
| INDIRECTOPDONEMASK | Indirect Complete Mask | 
| INDIRECTREADREJECTMASK | Indirect Read Reject Mask | 
| PROTWRATTEMPTMASK | Protected Area Write Attempt Mask | 
| ILLEGALACCESSDETMASK | Illegal Access Detected Mask | 
| INDIRECTXFERLEVELBREACHMASK | Transfer Watermark Breach Mask | 
| RECVOVERFLOWMASK | Receive Overflow Mask | 
| TXFIFONOTFULLMASK | Small TX FIFO Not Full Mask | 
| TXFIFOFULLMASK | Small TX FIFO Full Mask | 
| RXFIFONOTEMPTYMASK | Small RX FIFO Not Empty Mask | 
| RXFIFOFULLMASK | Small RX FIFO Full Mask | 
| INDRDSRAMFULLMASK | Indirect Read Partition Overflow Mask | 
| POLLEXPINTMASK | Polling Expiration Detected Mask | 
| STIGREQMASK | STIG Request Completion Mask | 
| RXCRCDATAERRMASK | RX CRC Data Error Mask | 
| RXCRCDATAVALMASK | RX CRC Data Valid Mask | 
| TXCRCCHUNKBRKMASK | TX CRC Chunk Was Broken Mask |