A design can contain EDIF files generated by:
•Schematic text editors
•Any other design entry mechanism
These modules must be instantiated to be connected to the rest of the design.
Use BLACK_BOX instantiation in the HDL source code.
Vivado synthesis lets you apply specific constraints to these BLACK_BOX instantiations.
After you make a design a BLACK_BOX, each instance of that design is a BLACK_BOX.
Download the coding example files from Coding Examples.