mask register
| CCRCFAILIE | Command CRC fail interrupt enable |
| DCRCFAILIE | Data CRC fail interrupt enable |
| CTIMEOUTIE | Command timeout interrupt enable |
| DTIMEOUTIE | Data timeout interrupt enable |
| TXUNDERRIE | Tx FIFO underrun error interrupt enable |
| RXOVERRIE | Rx FIFO overrun error interrupt enable |
| CMDRENDIE | Command response received interrupt enable |
| CMDSENTIE | Command sent interrupt enable |
| DATAENDIE | Data end interrupt enable |
| DHOLDIE | Data hold interrupt enable |
| DBCKENDIE | Data block end interrupt enable |
| DABORTIE | Data transfer aborted interrupt enable |
| TXFIFOHEIE | Tx FIFO half empty interrupt enable |
| RXFIFOHFIE | Rx FIFO half full interrupt enable |
| RXFIFOFIE | Rx FIFO full interrupt enable |
| TXFIFOEIE | Tx FIFO empty interrupt enable |
| BUSYD0ENDIE | BUSYD0END interrupt enable |
| SDIOITIE | SDIO mode interrupt received interrupt enable |
| ACKFAILIE | Acknowledgment Fail interrupt enable |
| ACKTIMEOUTIE | Acknowledgment timeout interrupt enable |
| VSWENDIE | Voltage switch critical timing section completion interrupt enable |
| CKSTOPIE | Voltage Switch clock stopped interrupt enable |
| IDMABTCIE | IDMA buffer transfer complete interrupt enable |