Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

what's non-inverted input pin ?

Hello, During complete my project, I stuck at a problem with pll. I use kit Cyclone III devlopment kit I try to use clock 50MHz to feed pll1 by pin AH15. During synthesing and analyzing it re...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

It means that the PLL needs to be driven from a pin with a CLKIN or DIFFCLKIN_P function, but not a DIFFCLKIN_N (inverted input) function (unless your clock is a differential input, in which case, both DIFFCLKIN_P and N would be used).

Cheers,

Dave