Robuta

https://docs.amd.com/v/u/en-US/xapp640 Timing Constraints for Virtex-II Pro Designs (XAPP640) - XAPP640 "Timing Constraints for Virtex-II... XAPP640 "Timing Constraints for Virtex-II Pro Designs" v1.1 (01/03) timing constraints virtex ii pro designs