Forum Discussion
Altera_Forum
Honored Contributor
Honored ContributorCyclone PLL frequency range
I’m currently working on project which uses Cyclone Family Part#EP1C20F400I7. Device has internal PLL and I’m using Altera’s megafunction “altpll” component to simulate logic. The device has been con...
Altera_ForumHonored Contributor
Honored ContributorIf you supply reference clock different from what you set in the altpll, the PLL might not able to lock to the reference clock. You can try to update the settings in the altpll to take in lower reference clock frequency.
