[SI-LIST] PCI I/O design jumpstart
- From: "Degerstrom, Michael J." <degerstrom.michael@xxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Fri, 22 Feb 2002 10:52:40 -0600
Hello,
We are just beginning a task to design PCI compliant I/O.
In addition to pouring over specifications I would greatly
appreciate if anyone could offer answers for the following
questions. We have designed full swing CMOS input, output,
tri-state and bi-directional output buffers in the past and
have done many other I/O and signal-integrity related projects.
So we are looking for PCI specific information only.
Here's the questions:
1) We have the PCI Local Bus Rev 2.2 spec. Are there any
other spec's/app notes that will be of use?
2) The CMOS technolgy will be 3.3V compliant but not 5 Volt
compliant. Are there 5 Volt signals on the mainboard or
other PCI cards that may not be compatible with our 3.3V
maximum voltage requirement?
3) What is/are the basic I/O? For example are all I/O
the same bi-directional design or are there input-only and
output-only buffers? I've seen mention of open-drain
outputs. Is this for some kind of wired-OR equivalent
operation? Are there are terminating resistors?
4) There are 3.3V pull-up and pull-down curves and
other AC and DC specs in the rev. 2.2 document. Is
this information complete enough to design PCI I/O?
Thanks in advance,
Mike
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