Cyclone® 10 GX Core Fabric and General Purpose I/Os Handbook

ID 683775
Date 7/08/2024
Public
Document Table of Contents

5.5.4.5. Differential Input RD OCT

All I/O pins and dedicated clock input pins in Cyclone® 10 GX devices support on-chip differential termination, RD OCT. The Cyclone® 10 GX devices provide a 100 Ω, on-chip differential termination option on each differential receiver channel for LVDS standards.

You can enable on-chip termination in the Quartus® Prime Pro Edition software Assignment Editor.

Figure 78. On-Chip Differential I/O Termination


Table 48.   Quartus® Prime Pro Edition Software Assignment Editor—On-Chip Differential TerminationThis table lists the assignment name for on-chip differential termination in the Quartus® Prime Pro Edition software Assignment Editor.
Field Assignment
To rx_in
Assignment name Input Termination
Value Differential

Alternatively, you can enable the on-chip differential I/O termination by adding the following assignment in your .qsf:

set_instance_assignment -name INPUT_TERMINATION DIFFERENTIAL -to <input pin name>