How we can write a setup or hold time constraints for a clock that isn't a global clock, it's come from a combinational logic inside my code ?
Take in mind that the tool gives me an error that the this net isn't connected to a pad or a pin when i type the constraints as shown:
NET "u0_dphy_data_master/the_dphy_master_lp_rx/rx_clk_tmp" TNM_NET = clock;
TIMEGRP "clock" OFFSET = IN 0.2 ns VALID 50 ns BEFORE "u0_dphy_data_master/the_dphy_master_lp_rx/rx_clk_tmp" RISING;
While um reading in the UCF constraints user manual i found that we have to use this commands with a global clocks only
Is my understanding to this point is true or we have another way to define a constraints to a not global clock ?
Thanks in advance