Forum Discussion
Altera_Forum
Honored Contributor
Honored ContributorCPLD EPM570 internal oscillator clock stability
Hello, I understand the absolute frequency of the internal oscillator is not known and varies with temperature and device charge between 3.3 MHz and 5.5 MHz. Fortunately for my project the absolut...
Altera_ForumHonored Contributor
Honored ContributorThe internal oscillator isn't intended for precise timing purposes, so it's pretty understandable that no other parameters than frequency range are specified. You should measure it yourself.
Just for comparison, I see with the MAX10 internal oscillator about 1e-3 relative jitter, e.g. 1 ns peak-to-peak after 1 µs delay. Short term stability seems acceptable.
