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Altera_Forum
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13 years ago

Series termination in Cyclone 4

I’m trying for the first time to use the on-chip termination features on a cyclone 4. I created an iobuf megafunction, enabled the series termination control, and tried to compile it. The compiler ...
Altera_Forum's avatar
Altera_Forum
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13 years ago

The series termination control is for user mode calibration, that's not a Cyclone IV feature. To use calibrated or non-calibrated series OCT, you just need to make output termination assignments to the pins. If you select series 50 ohm with calibration (or 25 ohm), Quartus II will enable the Rup and Rdn pins automatically when you compile.

You don't need to use the ALTIOBUF megafunction in this case.