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Altera_Forum
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11 years ago

IO megafunction altpll not available for cyclone V in Quartus II 14.1

I am using web edition of Quartus II 14.1 and try to build an application for Cyclone V device (5CEBA7F31C8). I found that Symbol->megafunctions->IO->altpll has been grayed out. I check the cyclone V...
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Altera_Forum
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9 years ago

The PLL structure is different in hardware in the Cyclone IV and Cyclone V families. You won't be able to produce a PLL component that is compatible with both families.

Your best bet would be to find a subset of functionality supported by both hardware implementations and develop a common interface with two different implementations.