Forum Discussion
raviganesh
Occasional Contributor
Occasional ContributorALTPLL Clock switchover in Cyclone 10 LP
I am using the ALTPLL to generate a 80MHz clock from a 48MHz clock. This is fine. Later when an independent clean 80MHz clock is available I am switching over to this clock by using the clock switch...
JonWay_altera
Frequent Contributor
Frequent ContributorHi @User15891149574421405910 You will need to perform a dynamic reconfiguration if you want to keep the same 80Mhz when you are switching ref clock from 48Mhz --> 80Mhz.
Normally, the usage model is that....
For redundancy purposes, you have 2 ref clock of the same frequency + automatic switchover.
For clock sources originate from multiple cards on the backplane, requiring a system-controlled switchover between frequencies of operation (e.g. manual switchover + dynamic reconfiguration).
Hope this answers your questions.
