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Altera_Forum
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10 years ago

Use of buffered and unbuffered clocks in circuit

I was examining the postfit results of my design and noticed that the fitter automatically inserted CLKCTRL cells into several of the clocks in my design. That is well and good but I noticed that in...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

In general if you meet timing, don't worry about whether it uses the clock buffering in the path. But its best to use the dedicated clock input pins when assigning external clocks. If its an internal clock, as mentioned earlier you can assign to a global.