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Altera_Forum's avatar
Altera_Forum
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7 years ago

Cyclone IV PLL Reconfiguration parameter setting

Hi, im using cyclone IV now, and i want to change one of the PLLs output frequence from 3MHz to 99MHz by step 3MHz when FPGA works. I use ALTPLL_RECONFIG IP core, and want to set parameter manua...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
7 years ago

Hi,

Thanks for your reply, after reading the link, i know how to calculate the right value of N counter, M counter and C counter.

But the biggest problem is to set Loop-Filter-Capacitance/Resistance and Charge-Pump-Current value.

It seems that altera doesn't want to share the details.