Article ID: 000077778 Content Type: Troubleshooting Last Reviewed: 08/13/2012

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

Environment

    Quartus® II Subscription Edition
BUILT IN - ARTICLE INTRO SECOND COMPONENT
Description

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.

Related Products

This article applies to 10 products

Stratix® II GX FPGA
Stratix® III FPGAs
Stratix® IV GX FPGA
Stratix® V FPGAs
Stratix® IV FPGAs
Cyclone® V FPGAs and SoC FPGAs
Intel® Arria® 10 FPGAs and SoC FPGAs
Stratix® II FPGAs
Arria® V FPGAs and SoC FPGAs
Arria® II FPGAs

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