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Altera_Forum
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13 years ago

Can Cyclone II I/Os interface PCI 3V3/5V directly ?

Hi, i want to design a FPGA cyclone II board with PCI universal 3V3/5V interface for master thesis. But i am worry about voltage of universal PCI spec,because FPGA I/O is 3V3. Some design i found ...
Altera_Forum's avatar
Altera_Forum
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13 years ago

Dear Dave,

Thanks for your reply,really useful for me. So if i do not need hot swap function, i can interface FPGA I/Os to PCI connector directly . Because i keep my design is so simple if possible,because PCI is just a communication protocol. I wonder,if PCI 5V system output 5V to Input pin of FPGA (with VCCIO=3V3) can damage FPGA I/Os?

About PCI and PCIe,i use Low Cost Cyclone II TQFP so i think Cyclone II do not support PCIe link without TI PHY serdes chip , and maybe Driver is more complex too.

Best,

Hoang Nguyen