Transmit Credit Update Interval Configuration Register 0 @0x1c
This register contains parameters that control how frequently the Controller sends a credit update to the opposite node.
| Bits | SW | Name | Description | Reset |
|---|---|---|---|---|
| 15:0 | R/W | Minimum Posted Update Interval [MPUI] | Minimum credit update interval for posted transactions. The Controller follows this minimum interval between issuing posted credit updates on the link to limit the bandwidth use of credit updates. If new credit becomes available in the receive FIFO since the last update was sent, the Controller will issue a new update only after this interval has elapsed since the last update. The value is in units of 16 ns. This field is re-written by the internal logic when the negotiated link width or link speed changes. The user may override this default value by writing into this register field. The value written will be lost on a change in the negotiated link width/speed. | 16'd4 |
| 31:16 | R/W | Minimum Non-PostedUpdate Interval [MNUI] | Minimum credit update interval for non-posted transactions. The Controller follows this minimum interval between issuing posted credit updates on the link. This is to limit the bandwidth use of credit updates. If new credit becomes available in the receive FIFO since the last update was sent, the Controller will issue a new update only after this interval has elapsed since the last update. The value is in units of 16 ns. This field is re-written by the internal logic when the negotiated link width or link speed changes. The user may override this default value by writing into this register field. The value written will be lost on a change in the negotiated link width/speed. | 16'd4 |