Forum Discussion
EKaya
New Contributor
2 years agoCyclone IV familiy definitely supports ALT PLL, since its introduction in 2009.. Here is a screen shot from Quartus 22.1...
BTW linked document is dated from 2006, Cyclone IV introduced in 2009... Of course ALTPLL can`t suport it in 2006..
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Basic function is broken in version 23.1 ...
Either downgrading to <=22.1 or copying ALTPLL from 22.1 to 23.x solves the issue...
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Have a nice day.