Interrupt masked register
| TR_TX_REQ | Logical and of corresponding request and mask bits. |
| TR_RX_REQ | Logical and of corresponding request and mask bits. |
| XIP_ALIGNMENT_ERROR | Logical and of corresponding request and mask bits. |
| TX_CMD_FIFO_OVERFLOW | Logical and of corresponding request and mask bits. |
| TX_DATA_FIFO_OVERFLOW | Logical and of corresponding request and mask bits. |
| RX_DATA_FIFO_UNDERFLOW | Logical and of corresponding request and mask bits. |