Description
In the TimeQuest timing analyzer, Fmax is only based on the setup check, while the Restricted Fmax checks setup, hold and minimum period/pulse width. Usually, Fmax is not limited by hold checks as they are generally same-edge relationships and therefore independent of frequency. However, if you have an inverted clock transfer or a multicycle transfer then the hold relationship is no longer a same-edge transfer and therefore changes with frequency. If the hold check limits the Fmax more than the setup check, the TimeQuest timing analyzer displays Limit due to hold check as the reason for the restricted Fmax.
Resolution