Intel® Cyclone® 10 GX Transceiver PHY User Guide

ID 683054
Date 4/14/2023
Public
Document Table of Contents

2.4.12. Unused Transceiver Channels

To prevent performance degradation of unused transceiver channels over time, the following assignments for RX pins must be added to an Cyclone® 10 GX device QSF. You can either use a global assignment or per-pin assignment. For the per-pin assignment, true or complement RX pin can be specified.

set_global_assignment -name PRESERVE_UNUSED_XCVR_CHANNEL ON

or

set_instance_assignment -name PRESERVE_UNUSED_XCVR_CHANNEL ON -to [pin_name (BB6, for example)]

Example of <pin_name> is AF26 (Do not use PIN_AF26)

set_instance_assignment -name PRESERVE_UNUSED_XCVR_CHANNEL ON -to AF26

Note: This assignment applies to either an RX or a TX pin. If you assign it to both, the fitter fails.