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I'm not sure I understand your problem, but if you have a pll in your sopc system, then its outputs will appear in the clock list and you can select it from there.
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Hi Daixiwen,
I Know that's outputs will appear in the clock list as you say , i will re-explain, my problem is in assignement pin. I don't know exactly the assignement pin correspond to the ouput_clock of the pll.
I reltad the input of pll to PIN_AC34, that the output pll.c0 i don't know exactly to wich pinshould i connect the output.