To implement the PHY in a synthesized design outside of opt_design, enter:
When you use this command, the Vivado tools implement the memory controller in the synthesized netlist without implementing the whole design. For more information, see section Tcl command in the Vivado Design Suite Tcl Command Reference Guide (UG835).
implement_mig_cores command more than once on
an open design. Instead, close the design, reopen it, and run the command