Forum Discussion
Altera_Forum
Honored Contributor
Honored ContributorDriving PLLs off multiplexed clocks
Hi Guys, I have a system that I need to test over a range of frequencies and to save myself some time and effort I wish to automate the process (especially since I have to do this well over 10...
Altera_ForumHonored Contributor
Honored ContributorHi,
The clock that went through the MUX should be considered a gated clock already. I believe this is why QII does not allow this to be fed into the subsequent PLL. Can you check if the PLL in your device support refclk selection or switching? I know transceiver PLL support this but not sure about normal PLL.
