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PCI VI/O voltage for universal motherboard

Thread starter PianoMan
Start date Feb 3, 2003

Status: Not open for further replies.

Feb 3, 2003

PianoMan

Computer

I'm working on a single board computer design with a PC104 Plus (PCI) connector. I would like it to accommodate both 3V and 5V cards. Though there are multiple VI/O pins, it looks like they all must be connected to the same voltage. What voltage do I connect those pins to for universal support? Also, should I plug both the 5V key (pin A1) and the 3.3V key (pin D30)?