Critical Issue
Description
When you compile an Interlaken MegaCore function 12- or 20-lane variation that excludes transceivers, the following warning message appears:
Critical Warning: (High) Rule C105: Clock signal should
be a global signal.
Found <num> node(s) related
to this rule.
The warning message includes a list of rx_lane_clk<n>_export[<l>] signals,
and if the out-of-band flow control block is included, some clock
signals from that block.
Resolution
This issue has no workaround. However, this issue has no design impact. You can ignore this warning message.
This issue will be fixed in a future version of the Interlaken MegaCore function.