Do Arria V GX devices support transceiver PMA Direct mode? - Do Arria V GX devices support transceiver PMA Direct mode? Description No, Arria® V GX devices do not support transceiver PMA Direct mode. You may see the following error if you try and compile a Native PHY in PMA Direct mode on Arria V GX devices. Error: Channel PLL Parameter 'output_clock_frequency' is set to an illegal value of 'x MHz' and PMA Direct parameter is set to 'true'. If PMA Direct is false, the value is illegal for protocol mode: '' with a device speed grade of '6_Hx', PMA WIDTH of '' and byte deserializer mode : '' and latency '' on atom Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['FPGA Dev Tools Quartus II Software'] novalue 12.0.2 ['Arria® V GT FPGA', 'Arria® V GX FPGA'] ['novalue'] ['novalue'] ['novalue']