Due to an incorrect receiver common mode voltage (Rx Vcm) setting in Quartus® II software version 14.0 and earlier, the PCI Express® signal detect feature may fail at low temperatures on Arria® V GT and ST devices and the link fail to train.
The table below shows the Arria device VCCR_GXB and Rx Vcm requirements.
|Device||VCCR_GXB Voltage||Rx Vcm Voltage|
|Arria V GX, SX||1.1V/1.15V||0.65V|
|Arria V GT, ST||1.2V||0.75V|