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Re: Wakeup via PRSNT_ Signals
- To: Mailing List Recipients <pci-sig-request@znyx.com>
- Subject: Re: Wakeup via PRSNT_ Signals
- From: uo957@freenet.victoria.bc.ca (James MacPhail)
- Date: Tue, 20 Aug 1996 12:40:27 -0800
- Resent-Date: Tue, 20 Aug 1996 12:40:27 -0800
- Resent-From: pci-sig-request@znyx.com
- Resent-Message-Id: <"4iZYi1.0.he2.AJX6o"@dart>
- Resent-Sender: pci-sig-request@znyx.com
How about extending the function of the PRSNT1/2 signals to add wakeup
functionality? (saving valuable reserved pins etc.)
>The PCI Specification states that the PRSNT1 and PRSNT2 pins on the 32 bit
>PCI connector are related to the connector only:
>
>"They are used for two purposes: indicating that a board is physically
>present in the slot and providing information about the total power
>requirements of the board." - PCI Spec, Rev. 2.1, Section 4.4.1.
>
>It also states that these signals "inform the motherboard of the power
>requirements of the add-in board.... The motherboard provides pull-ups on
>these signals to indicate when no board is currently present." Section 2.2.8.
James MacPhail
uo957@freenet.victoria.bc.ca "Think not of engineering as art,
Sigma Seven Systems Ltd. but of art as engineering"
sigma@brentwood.bc.ca
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