Overriding encrypted IP files - specifically PLLs

[Altera_Forum]

Folks, 

 wanted to know if anyone had any experience overriding or superseding some encrypted source.  There is a pll that generates an application clock that I would like to reduce the frequency of.  I have regenerated the corresponding pll with a slightly slower output frequency however the tools are not happy that there are 2 plls with the same name.  Just wondering of there are any tricks/config that would help to accomplish my goal.  Cheers,  DC

[Altera_Forum]

If the original PLL is a standalone file, you could either remove/rename it, or modify the .qip to no longer point to it. Then just add your file. If the PLL is part an HDL file that has other things in it which must be read in, I can't think of a way. There's no way to read in an HDL entity/module and then discard it or replace it. (Configuration statements allow binding of modules to specific instantiations, but I don't know if they can be done separately.)