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Altera_Forum
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15 years ago

altclkctrl mux with 2 pll outputs as inputs

I have clk_a and clk_b from 2 pll outputs, and I want to mux them to clk_out with altclkctrl. but Q2 complaints that altclkctrl inputs " must be driven by 1 PLLs but is driven by 2 PLLs" . What can i...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

The problem is that I can't choose the way of generating the clks, I 've to use 2 PLLs at the moment. I've no choice but to figure out a way to mux 2 pll outputs. I am currently using "assign clk_out=clk_sel==0?clk_a:clk_b;" but that's violating the C101 rule.