6982 - Radiant: Why do we encounter the error: "PAR does not support signal <clock name> driving more than two DCCs"?

6982 - Radiant: Why do we encounter the error: "PAR does not support signal <clock name> driving more than two DCCs"?

Solution: In Lattice Radiant software, the error "PAR does not support signal driving more than two DCC" is because PAR (Place and Route) only supports one or two DCC (Dynamic Clock Control) loads for one clock signal at present. The reason is, each DCC needs to take a dedicated clock “feedline” on device that are shared among all clocks, so we try to avoid overdoing it.