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Use the following constraints for the Classic Timing Analyzer:
set_instance_assignment -name SETUP_RELATIONSHIP "4.43 ns" -from "u_rx_pll|c0" -to "u_rx_pll|c2"
set_instance_assignment -name HOLD_RELATIONSHIP "0 ns" -from "u_rx_pll|c0" -to "u_rx_pll|c2"
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SETUP_RELATIONSHIP and HOLD_RELATIONSHIP are not the same Classic Timing Analyzer assignments as tsu and th. See the on-line help pages for all these assignments. The "Setup Relationship timing assignment" on-line help page and similar hold relationship page do list clock-to-clock as a valid form of those assignments (unlike the tsu and th assignments for I/O timing).
Honored Contributor
