For some protocols, the OBUFDS_GTE3/4 needs to be instantiated manually.
The differential clock output is not toggling after I instantiate OBUFDS_GTE3/4 via the language template.
However, the clock behavior is correct in simulation.
Why is this occurring?
To resolve this issue, modify the REFCLK_ICNTL_TX(5'b00000) into REFCLK_ICNTL_TX(5'b00111) as the transceiver wizard recommends: