[ibis-interconn] IBIS Interconnect Comments on Draft 13

From: "Bob Ross" <bob@xxxxxxxxxxxxxxxxx>
To: "IBIS-Interconnect" <ibis-interconn@xxxxxxxxxxxxx>
Date: Thu, 4 Dec 2014 09:51:25 -0800
IBIS Interconnect Group:

Here are some comments on Draft 13 that I had
planned to discuss at the meeting.

1.  Page 4.

Change the .ipkg example name to all lower case
(while linux is case sensitive, windows is not).  Because
the interconnect specification is for on-die and package
descriptions, we might revisit the required extension,
e.g., iid for IBIS Interconnect Description.

Add "Sub-params:" in the header
to header to be consistent with other keywords
with subparameters.

Delete Language since File_TS and File_ISS already
designates the language.  Besides, Language is used
elsewhere with more arguments.

For Unused_Terminal_Termination, and Number_of_Terminals,
add "=" to the rules to be consistent with other subparameters
that accept numerical arguments (e.g., Vinh = 2.0 versus
Model_type I/O).

So the syntax for these subparameters would be
Unused_Terminal_Termination = 50.0
and 
Number_of_Terminal = 9

[Manufacturer] - Require since it is required for PKG and
EBD formats.  This would be for the generator of interconnect
file (even though the file may have references to .iss or .ts files
from other manufacturers (for packages).

[Description] - Require since it is required in PKG format.
([Manufacturer] is illegal in EBD format.)  This can be used to
give topological information such as the package type or
layout type such as Quad Flat Pack.

3. Page 5:

After the sentence about base units of frequency and length, delete
the next two sentences.   There is no need for this added information.

4. Page 6:

Change Buf_XRef to Buf_ExtRef.  However, the exact terminology is
still an open issue for everything.

5. Page 12:

We should define the keyword [End Interconnect Model Selector]
after the [End Interconnect Model] definition.

Delete the NOTES section through bullet 4.  This can be moved to the
Analysis Path or the Other Back Ground Information section to document
the reasons for the syntax.

Bob



--

Bob Ross
Teraspeed Labs
http://www.teraspeedlabs.com
bob@xxxxxxxxxxxxxxxxx
Direct: 503-246-8048
Office: 971-279-5325


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[ibis-interconn] IBIS Interconnect Comments on Draft 13

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