Forum Discussion

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

pll reconfiguration on cycloneIII

Dear all, My requirement is to have a pll that can be reconfigured on fly to 2 different frequency 100 MHz and 50 MHz. My input clock is 5MHz. I am using 2 ROM having the settings for the 2 fre...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Cyclone III is said in the thread title, and 5 MHz is the minimal clock input frequency for the device. So by specification, it should work. But I would also prefer your solution with a clock mux, because it involves less effort and no PLL re-locking after clock switch.