[IBIS-Users] RE: I have read IBIS again and still am confused about typ min max rules, and the parser handles this inconsistantly

Walter,
 
 
I guess that you made a Freudian lapse when you mention
"[Model Specific]" below and you meant "[Model Spec]", correct?
(Too much AMI, right)...
 
The omission of these checks seems to be a parser bug to me.
Remember, [Model Spec] was added much later to the spec
than C_comp and we had changes in parser developers, so
I can imagine that the person who developed the parser when
the [Model Spec] keyword was added might have had a different
mind set and didn't think of writing checks for those.
 
Arpad
==============================================================

________________________________

From: Walter Katz [mailto:wkatz@sisoft.com]
Sent: Wednesday, September 29, 2010 10:32 AM
To: Bob Ross; Muranyi, Arpad; Michael Mirmak; 'ibis@server.eda.org';
'ibis-users@server.eda.org'
Subject: I have read IBIS again and still am confused about typ min max
rules, and the parser handles this inconsistantly

All,
 
From IBIS 5.0:
 
| Usage Rules: [Model Spec] must follow all other subparameters under
the
| [Model] keyword.
|
| For each subparameter contained in the first column, the
| remaining three hold its typical, minimum and maximum values.
| The entries of typical, minimum and maximum must be placed on
| a single line and must be separated by at least one white
| space. All four columns are required under the [Model Spec]
| keyword. However, data is required only in the typical
| column. If minimum and/or maximum values are not available,
| the reserved word "NA" must be used indicating the typical
| value by default.
|
| The minimum and maximum values are used for specifications
| subparameter values that may track the min and max operation
| conditions of the [Model]. Usually it is related to the
| Voltage Range settings.
 
The parser complains when "min <= typ <= max" is violated for [Model]
parameters (e.g. C_Comp), but does not complain when this is violated
for [Model Specific] parameters.
 
So is this a bug in the parser, or should the document say that "min <=
typ <= max" is not required for [Model Specific] parameters.
 
Walter
 
Walter Katz
303.449-2308
Mobile 303.883-2120
wkatz@sisoft.com
www.sisoft.com
 

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