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Altera_Forum's avatar
Altera_Forum
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10 years ago

Changing PLL speed after compilation

Using Quartus II 13.1.0, device is Arria V GX family. I am trying to change the speed of a PLL in my design without recompiling. I open the chip planner, make sure it's in ECO mode, select the...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

I've never tried changing that, but there are a number of things that can't be changed via RPE. If it's grayed out, I'm guessing it's not possible. Two other things to try, which involve changing the PLL source:

1) Rapid recompile, if it's available. (Processing -> Start -> Rapid Recompile)

2) Put the PLL in a partition. Set your partition Top that already exists to Post-Fit, then recompile.

Neither will be as fast as what you want via RPE, but minimally the second should do the trick.