RE: Question about PCI 2.2 spec and 3.3V signaling

["Ellerbrock, Philip J" <philip.j.ellerbrock@boeing.com>]

We designed a PCI 2.2 compliant card that can only work at 3.3 volts.  Many
high-end workstations now have 3.3 volt slots but it is not extremely
popular.  We would like to use our card with a PCI-based Single Board
Computer (SBC) on a passive backplane but have not been able to locate one
that will accept a PCI 3.3 volt card.  Your previous email in this subject
implied that the signalling is probably 3.3 volts.  

We are building a dedicated system where we will be the only PCI card with
the SBC. Is it likely that the PCI 2.2 compliant SBC would work with our 3.3
volt PCI card?  If so, is there anything we need to verify or modify (other
than the connector key) to make sure we do not fry our board or the SBC?

Philip Ellerbrock
Senior Specialist Engineer
Technical Lead - IntelliBus Network Systems
The Boeing Company
314-232-7472
philip.j.ellerbrock@boeing.com