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Altera_Forum
Honored Contributor
Honored ContributorQuartus TimeQuest TA
Hi, I have some clock muxes in the design and am using Stratix-IV GT. The Fitter automatically places the input clocks and output clocks of that clock mux in different clock tree. Thus resulting i...
Altera_ForumHonored Contributor
Honored ContributorI suggest that you use ALTCLKCTRL blocks to mux the clocks, if you aren't already doing so.
As far as constraints go, the mux's output signal isn't handled as if it were a separate clock. Thus, set_clock_groups only takes the mux's inputs and the rest is handled automatically.
