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Altera_Forum
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10 years ago

Cyclone V GX FPGA PLL not working

I have used the Cyclone V GX C7 device(5CGXFC7C7F23C8) in my design. I do not use the Gbit transceiver in my design, so I have not get the relevant power pins like VCCE_GXBL VCCL_GXBL and VCCH_GXBL c...
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Altera_Forum
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10 years ago

Thanks for your reply! As I mentioned in my first message, is it possible to make it work if I replace the current FPGA with a pin compatible E series FPGA? I check the pin map for the corresponding E series FPGA, the VCCH_GXBL is used as VCCA_PLL. It looks like part of the VCCA_PLL power pins are not connected, will the other half of the PLLs work for a E series FPGA?

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You may refer to PCG-01014-2.1 Cyclone® V Device Family Pin Connection Guidelines. According to the description, "VCCH_GXBL and VCCA_FPLL must always be powered up for the PLL operation."

https://www.altera.com/literature/dp/cyclone-v/pcg-01014.pdf

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