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Pullup Resistor Values in PCI 2.1 Spec
- To: Mailing List Recipients <pci-sig-request@znyx.com>
- Subject: Pullup Resistor Values in PCI 2.1 Spec
- From: "O'Shea, David J" <david.j.oshea@intel.com>
- Date: Thu, 24 Sep 1998 17:30:21 -0700
- Delivered-To: pcisig@teleport.com
- Resent-Date: Fri, 25 Sep 1998 11:36:57 -0700
- Resent-From: pci-sig-request@znyx.com
- Resent-Message-ID: <"C0sPp1.0.au5.rFk2s"@electra.znyx.com>
- Resent-Sender: pci-sig-request@znyx.com
On reading the PCI 2.1 printed spec, we had a question here about the
table in section 4.3.3 (Table 4.9) on the pullup resistor values.
The table shows:
5V uses 2.7Kohm
3.3V uses 8.2 Kohm
But the engineer thinks that the formulas above it don't agree with the
values. We think the table is perhaps backwards?, 5V and 3.3V values
swapped.
Can anyone out there speak authoritatively on what the 5V pullup values
should be?
Can you give the reason why whatever the correct values might be. Please
feel free to be terribly technical, I'm just going to forward this to
someone
whom I sure will know what your saying, but I won't.
Thanks,
David O'Shea
Corollary Inc.