Description
The mapping between the signal detect threshold voltage (Vth) and the setting in the Stratix® IV GX ALTGX MegaWizard™ is detailed in the table below.
| ALTGX Setting | Threshold Voltage (Vth) |
| 8 | 50mV |
| 7 | 45mV |
| 6 | 40mV |
| 5 | 35mV |
| 4 | 30mV |
| 3 | 25mV |
| 2 | 20mV |
| 1 | 15mV |
The rx_signaldetect status signal will assert when the receiver peak-to-peak differential input voltage VID(p-p) is higher than Vth multiplied by 4.
Resolution
This information will be added to a future release of the Stratix IV handbook.