Forum Discussion
SZack
Occasional Contributor
Occasional ContributorCyclone V internal oscillator specification
What is the frequency specification for the internal oscillator? In the handbook and Quartus itself it says you can choose a 12.5, 25, 50 or 100 MHz internal oscillator but in the datasheet it only ...
Ash_R_Altera
Regular Contributor
Regular ContributorHi,
There is no specification mentioning the internal oscillator frequency. However, based on internal team discussions, I came to know that this oscillator is meant for configuration and initialization only. It is not recommended for user design.
Regards.
SZackOccasional Contributor
Occasional ContributorHi Ash_R,
Actually I specifically mention where in the documentation it specifies the different frequencies that are allowed. I'm not asking for how accurate the clock is or how much jitter it has. And I realize it is only meant for configuration only. What I was pointing out was that the datasheet only mentions a 12.5 MHz option whereas the Handbook and Quartus provide four different frequency options.
