Cyclone V GX FPGA PLL not working

Refer to the 'power management' section, chapter 10, of the 'cyclone v device handbook (https://www.altera.com/en_us/pdfs/literature/hb/cyclone-v/cv_5v2.pdf)'. Refer to Table 10-2. Providing the monitored rails are powered, the device will exit POR, allowing you to use the device. VCCA_FPLL falls into the 'Not Monitored' category. So, assuming the monitored rails are powered correctly, at least your device should exit POR.

However, I wouldn't rely on your PLLs working if you do not have all the VCCA_FPLL pins powered - it looks like you're missing power to two out of 6 VCCA_FPLL pins. Whilst some devices may power half the PLLs from half the PLL power pins, the Cyclone V documentation doesn't state whether that's the case for this family. I suspect it's more likely that the 6 power pins are connected together in the package - although I can't state that is the case. So, power to 4 might/could be enough to get it working.

You'll just have to try it. However, I think you may end up having to re-spin the board. I wouldn't consider shipping a unit without the FPGA being powered correctly, even if your re-worked board does appear to work.

Cheers,

Alex