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2.5.3. How to Enter Calculated Channel Signal Integrity Values
Arria V, Cyclone V, and Stratix V
For 28nm families, fixed values are assigned to different signals within the timing analysis algorithms of the Quartus Prime software. The following table shows the values for different signal groups:
Signal Group | Assumed Channel Loss |
---|---|
Address/Command (output) | 250 ps |
Write (output) | 350 ps |
Read Capture (input) | 225 ps |
If your calculated values are higher than the assumed channel loss, you must enter the positive difference; if your calculated values are lower than the assumed channel loss, you must enter the negative difference. For example, if the measured channel loss for reads for your system is 250 ps then you should enter 25 ps as the read channel loss.