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Re: To 3V or /3V
- To: Mailing List Recipients <pci-sig-request@znyx.com>
- Subject: Re: To 3V or /3V
- From: rwalter@auspex.com (Richard Walter)
- Date: Tue, 21 Jan 1997 09:47:05 -0800 (PST)
- Resent-Date: Tue, 21 Jan 1997 09:47:05 -0800 (PST)
- Resent-From: pci-sig-request@znyx.com
- Resent-Message-Id: <"MYQsG3.0.WD5.t6Gvo"@dart>
- Resent-Sender: pci-sig-request@znyx.com
>
> Thanks to all those who responded to my inquiry about
> experiences with the PLX9060SD last week.
>
> To continue with another question, has anyone found
> a simple integrated solution to making a power circuit
> for the I/O on a universal (but otherwise 5V) card.
> There should be a simple way to sense which I/O voltage
> is needed and deliver it to the PCI compliant driver
> circuitry. Sorry if this is old or elementary stuff.
On the PCI connectors, there are 3 different voltage signals:
5 volt pins, 3 volt pins, and I/O voltage pins. The I/O
voltage pins will be 5 volts in a 5 volt slot or 3 volts in
a 3 volt slot. So, you shouldn't need any active magic
circuitry to make a universal card. Simply use the VI/O
pins to supply buffer power for the interface chip, and
use the 5 volt pins to supply the rest of your board.
-Richard Walter
rwalter@auspex.com
Note: I speak for myself, not for Auspex.
>
> -----------------------------------------------------
> Name: Steve Deiss E-mail: deiss@sba.cerf.net
> Applied Neurodynamics 619-944-8859 voice
> 345 Via Montanosa 619-944-8880 fax
> Encinitas, CA 92024 http://www.cerfnet.com/~deiss
> ------------------------------------------------------
>
>
p ^