pin assignment

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hi:

In order to draw a PCB which contains BGA chip (FPGA)conveniently,I want to assigned pin manually in the quartusII,so I can check the correctness of my assignment thougth quartusII compilation.

after compilation,there is no error about assignment ,but there is a critical warning,that is :"timing requirments for slow model timing analysis were not met ".

I want to know if or not the problem of timing waring need to overlook ?

and there is another questions:

Besides pin assignment maunally,is there any better way to assign pins,expecialy for BGA packaging?

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Hi,

the warning means that your design did not run with the required clock speed. If you did not define a clock requirement Quartus ( TimeQuest) assumes a clock frequency of 1 GHz,

which is normally not a realistic requirement.

Kind regards

GPK