Forum Discussion
Altera_Forum
Honored Contributor
14 years agoHi,
We gave up and used a programmable pll from cypress. As far as I remember we spent a fair amount of time on it before giving up. The reason is that the internal pll's does not follow a general pattern, they use lookup tables that are derived in lab settings and they are kept confidential by altera. (You migth get stable values within a certain area, but there is no way to check that at runtime) If you hear something else then I would be interested to know. Altera should absolutely make something like this available, would save time and valuable space. apus