ID:18933 Unused transceiver channels cannot be preserved since CLKUSR pin location is incorrectly used as an output pin. To fix this warning, either connect the CLKUSR pin location to a 100-125 MHz clock or remove the QSF assignment enabling preservation of unused tranceiver channels.
CAUSE: No clock is is connected to the CLKUSR pin location. Instead, the CLKUSR pin is being used as an output pin.
ACTION: Connect the CLKUSR pin location to a 100-125 MHz clock or remove the QSF assignment enabling preservation of unused tranceiver channels.