chevuturi
Junior Member level 1
Hello, How to calculate setup and hold on common clock path if we have crosstalk delay ? And I did not understand The below statement : is it because the hold is calculated at zeroth cycle ?
There is one important difference between hold and setup analyses related to crosstalk on common portion of clock path (launch and capture). Launch and capture clock edge are normally the same edge for hold analysis. Clock edge through common clock portion cannot have different crosstalk contributions for launch clock path and capture clock path. Therefore, the worst-case hold analysis removes crosstalk contribution from common clock path.
Setup analysis concerns two different edges of clock which may be impacted differently in time. Thus, common path crosstalk contributions are considered for both launch and capture paths during setup analysis.
There is one important difference between hold and setup analyses related to crosstalk on common portion of clock path (launch and capture). Launch and capture clock edge are normally the same edge for hold analysis. Clock edge through common clock portion cannot have different crosstalk contributions for launch clock path and capture clock path. Therefore, the worst-case hold analysis removes crosstalk contribution from common clock path.
Setup analysis concerns two different edges of clock which may be impacted differently in time. Thus, common path crosstalk contributions are considered for both launch and capture paths during setup analysis.