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Altera_Forum's avatar
Altera_Forum
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15 years ago

pll reconfiguration and CP/LF parameters

Documentation describing the pll scan chain is clear enough for the settings of the m,n,cx counters. However, it is not clear to me how the charge-pump and loop-filter parameters should be calculated...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

I have never found any documentation from Altera which describes how these parameters should be calculated.

If you have a finite number of PLL configurations you want to support, one way to determine these paramaters is to simply put your requirements into the PLL Mega Wizard for each case and see what values it uses for each of the settings.