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RE: universal card

To: <pci-sig@znyx.com>, "Razmara, Rambod" <rrazmara@lsil.com>
Subject: RE: universal card
From: "Ingraham, Andrew" <Andrew.Ingraham@hp.com>
Date: Wed, 22 Jan 2003 14:32:07 -0500
Resent-date: Wed, 22 Jan 2003 11:35:16 -0800
Resent-from: pci-sig@znyx.com
Resent-message-id: <jv4fMD.A.bcD.-GvL-@electra>
Resent-sender: pci-sig-request@znyx.com
Thread-index: AcLCPuC/yOqGnUQySKOngLtxign/4AADDaiL
Thread-topic: universal card

To clarify a bit more...

There are Universal PCI cards, but not Universal motherboards or PCI
buses.

At the system level, the bus is either 5V, or 3.3V, permanently.  The
Vi/o pins on the connectors on that bus are hard-wired to either 5V or
3.3V power.

You can have a 5V PCI connector (into which a 5V or Universal card can
be plugged), or you can have a 3.3V PCI connector (into which a 3.3V or
Universal card can be plugged).  The PCI Spec does not define a
Universal connector into which any type of PCI card can be plugged.

Regards,
Andy

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