Interrupt mask register
| TR_TX_REQ | Mask bit for corresponding bit in interrupt request register. |
| TR_RX_REQ | Mask bit for corresponding bit in interrupt request register. |
| XIP_ALIGNMENT_ERROR | Mask bit for corresponding bit in interrupt request register. |
| TX_CMD_FIFO_OVERFLOW | Mask bit for corresponding bit in interrupt request register. |
| TX_DATA_FIFO_OVERFLOW | Mask bit for corresponding bit in interrupt request register. |
| RX_DATA_FIFO_UNDERFLOW | Mask bit for corresponding bit in interrupt request register. |