RE: [SI-LIST] : Intel's Pentium III IBIS models for the PGA370 socket

From: [email protected]
Date: Wed Nov 01 2000 - 01:33:43 PST

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The PIII prcessors do have on die terminators (with the exception of RESET).

The datasheet on Intel's web site gives some details of the AGTL signals.

Regards,

Colin Meikle

Mentor Graphics ( UK ) Ltd
Macmillan Road
Alderstone Business Park
Livingston
West Lothian
EH54 7DF
 
E-mail: [email protected]
 
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-----Original Message-----
From: Kim Helliwell [mailto:[email protected]]
Sent: 01 November 2000 00:15
To: [email protected]
Subject: [SI-LIST] : Intel's Pentium III IBIS models for the PGA370
socket

Has anyone had any success in using these models? I mean the ones that are
available at:

http://developer.intel.com/design/PentiumIII/devtools/fcpga_2_01.zip

In particular, I am having trouble understanding the instructions
in the documentation for measuring the buffer delays for the AGTL buffer
model.

The instructions say: "Use the Fast/Slow/Si corner model with 50 ohm
on-die Rtt."

In the first place, there is no 50 ohm model supplied (they only supply
56, 62, 68, 72, and 110 ohm Rtt models); so apparently they expect one
to create the 50-ohm model oneself in order to make the buffer delay
measurement. This is very annoying, if it's really the intention.

In the second place, it's my understanding that the actual die does not
have an internal Rtt, so why are the models supplied as if they have an
on-die Rtt?

There are other questions, but I risk losing the audience here.

Can anyone shed light on this?

Thanks in advance.

-- 
Kim Helliwell
Senior CAE Engineer
Acuson Corporation
Phone: 650 694 5030  FAX: 650 943 7260
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• Next message: Ingraham, Andrew: "RE: [SI-LIST] : High Speed AC Coupling"
• Previous message: yaserh: "[SI-LIST] : Why 110 VAC on my circuit"
• In reply to: Kim Helliwell: "[SI-LIST] : Intel's Pentium III IBIS models for the PGA370 socket"
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• Reply: Dan Bostan: "[SI-LIST] : Exceptional Employment Opportunities with ATOGA Systems"

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