Forum Discussion

jiec's avatar
jiec
Icon for New Contributor rankNew Contributor
1 year ago
Solved

Cyclone Ⅳ PLL Output Clock Frequency not Right

Hi, I am using the chip EP4CE15M8I7N, andi tried to use PLL in ip-core, but the frequency of the clock output is wrong. The frequency of the input clock is 50MHz, and what the frequency of the outpu...
Configuration
  • FvM's avatar
    FvM
    1 year ago
    Hi,
    low frequency PLL output is usually indicating missing input clock. I suspect wrong pin assignment or similar.

    Regards
    Frank
FvM's avatar
FvM
Icon for Super Contributor rankSuper Contributor
1 year ago
Hi,
low frequency PLL output is usually indicating missing input clock. I suspect wrong pin assignment or similar.

Regards
Frank
jiec's avatar
jiec
Icon for New Contributor rankNew Contributor
1 year ago

Hi,

Frank

Thanks again for your reply, I found that our hard design have some problem about power supply of the pin of PLL, we are going to solve it, Thanks!