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Altera_Forum
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15 years ago

Differential clock outputs from Cyclone II - How to assign

Is there a way (using Quartus) to output a differential clock from a Cyclone II PLL without getting the "Warning: ... Use PLL dedicated clock outputs to ensure jitter performance" message? I h...
Altera_Forum's avatar
Altera_Forum
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15 years ago

Thanks for the responses:

josyb: Where can I find the ddr_out function/block/primitive ?

fvm: I eventually found a more complete reply from you in another thread.

"Select a differential pin pair and assign a differential I/O standard to the positive pin in the Pin Planner or Assignment Editor. the negative pin is assigned by quartus automaticly." - That did the trick!

Carl