Forum Discussion
Altera_Forum
Honored Contributor
Honored ContributorALTCLKCTRL vs PLL with 2 reference clocks
Hello, My Cyclone V design has 2 reference clock inputs. I want to be able to manually switch between them during runtime. I know that the ALTERA_PLL megafunction can be configured to r...
Altera_ForumHonored Contributor
Honored ContributorThanks.
Another question about the ALTERA PLL when configured to use 2 reference clocks. Is this achieved buy cascading an upstream ALTCLKCTRL "behind the scene" and connecting its output to the PLL? Or is the dual clock input is a native feature of the PLL itself ?
