Device Family: Intel® Arria® 10, Arria® II, Arria® V, Cyclone® V, Stratix® II, Stratix® II GX, Stratix® III, Stratix® IV, Stratix® IV GX, Stratix® V

Intel Software: Quartus II

Type: Answers

Area: Component

Which "Input Termination" option in the Assignment Editor should I use for LVDS receivers?


The correct "Input Termination" option to use is "DIFFERENTIAL"


The resulting variable is added to the qsf file.


set_instance_assignment -name INPUT_TERMINATION DIFFERENTIAL -to <input_pin>


Check the respective device handbook to verify if differential termination is supported for the device family you are using.


When using the ALTLVDS megafunction for dedicated SERDES the Quartus® II fitter will automatically assign the LVDS standard for the I/O pins, however you will need to make the differential termination assignment for the LVDS receivers.