What ohm resistor should I connect to the RREF pin on the Stratix V GX?
If you use the Stratix V GX transceiver channel or REFCLK pin, connect a 1.8KΩ ±1% resistor to the RREF pin.
For more information, please refer to Stratix VE, GS and GX Pin Connection Guidelines, P11 at the URL link below
https://www.altera.com/en_US/pdfs/literature/dp/stratix-v/pcg-01011.pdf
* Please refer to the errata sheet released for the resistance value connected to the RREF pin.
https://www.altera.com/en_US/pdfs/literature/es/es_stratixv.pdf
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