Important: The Vivado Design Suite does not support the UCF
format.
For information on migrating UCF constraints to XDC commands, see section Migrating UCF Constraints to XDC in the ISE to Vivado Design Suite Migration Guide (UG911).
For information on migrating UCF constraints to XDC commands, see section Migrating UCF Constraints to XDC in the ISE to Vivado Design Suite Migration Guide (UG911).