| INLINK_DSCR_EMPTY_INT_ST | The status bit for lack of enough inlink descriptors. |
| OUTLINK_DSCR_ERROR_INT_ST | The status bit for outlink descriptor error. |
| INLINK_DSCR_ERROR_INT_ST | The status bit for inlink descriptor error. |
| IN_DONE_INT_ST | The status bit for completing usage of a inlink descriptor. |
| IN_ERR_EOF_INT_ST | The status bit for receiving error. |
| IN_SUC_EOF_INT_ST | The status bit for completing receiving all the packets from host. |
| OUT_DONE_INT_ST | The status bit for completing usage of a outlink descriptor. |
| OUT_EOF_INT_ST | The status bit for sending a packet to host done. |
| OUT_TOTAL_EOF_INT_ST | The status bit for sending all the packets to host done. |