| OUTLINK_ADDR | This register stores the least 20 bits of the first out link descriptor’s address. |
| OUTLINK_STOP | Set this bit to stop dealing with the out link descriptors. |
| OUTLINK_START | Set this bit to start dealing with the out link descriptors. |
| OUTLINK_RESTART | Set this bit to mount on new out link descriptors |
| OUTLINK_PARK | 1£º the out link descriptor’s fsm is in idle state. 0:the out link descriptor’s fsm is working. |