The information page of MAX V says it supports Digital PLL, https://www.altera.com/products/cpld/max-series/max-v/overview.htmlbut the datasheet does not mention it at all. How to use the PLL on MAX V ?
Please review this previous thread http://www.alteraforum.com/forum/showthread.php?t=27399&page=2The announced feature has apparently never been implemented. May be it's buggy silicone. I believe you can safely forget about it.