Dear PCI experts,
The electrical spec (Pci rev 2.2) recommend that PCI components on a universal board must use dual voltage I/O buffers, powered from
"I/O" designated power pins.
In my PCI universal card I'm using a PLD (FPGA device) which is powered by 3,3V supply and can not drive and be driven by 3.3V or
5.0V devices.
Any comments about this matter?
Now my question is: in a new universal board can I leave unused dedicated Vi/o pins on the PCI edge connector (properly decoupled to
the ground plane) and use only the 3.3V supply from the PCI connector (or 5V supply with a regulator) to power up the PLD? Also,
regarding I am using PCI edga universal connector, and not dedicated 3.3V PCI connector, do I have to add some serial resistance
onto the signal lines to compensate for the clamping diodes.
Thanks for any suggestions.
Goran Grbic
Senior H/W Apps Engineer
MOSAID Technologies
p: 613-599-9539/1481
f: 613-591-8148