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RE: Whats the Recommended Buffer for PCI devices?
- To: <firstname.lastname@example.org>
- Subject: RE: Whats the Recommended Buffer for PCI devices?
- From: "Ingraham, Andrew" <Andrew.Ingraham@hp.com>
- Date: Sun, 10 Nov 2002 18:40:05 -0500
- Resent-Date: Sun, 10 Nov 2002 15:52:00 -0800
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- Thread-Topic: Whats the Recommended Buffer for PCI devices?
> In VME, the recommended buffer is '543, what is it in
> case of PCI?
In PCI, there is no recommended generic buffer.
The PCI interface is meant to be implemented in some sort of ASIC ...
"without any external buffers or other 'glue.'" It is not meant to be
built using standard SSI/MSI ICs. I think you would encounter
significant (if not impossible) problems with things like timing and
clock distribution if you tried.
PCI has two different (though somewhat compatible) electrical signaling
environments. The "5V" environment is loosely based on TTL signaling
levels, whereas the "3.3V" environment has different signaling levels
and is more optimized for CMOS. I do not believe that the details of
either were based on any particular standard TTL or CMOS device.