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********************* IBIS GOLDEN PARSER BUG REPORT FORM *********************
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INSTRUCTIONS

To report a bug in the IBIS golden parser.  Please fill out the top part
of the following form and send the complete form to ibischk-bug@vhdl.org.

A list of reported bugs will be maintained on vhdl.org.

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PARSER VERSION NUMBER: 3.2.6

PLATFORM (SPARC, HP700, PC, etc.): PC

OS AND VERSION: Windows 98SE

REPORTED BY: Michael Mirmak, Intel Corp.

DATE: January 8, 2001

DESCRIPTION OF BUG:

Parsing a [Model] without a [Pullup] section -- but with a
Model_type of I/O_open_drain -- causes the following warning to 
appear:

WARNING - [Model] xxx has no description of the buffer's high state
         DC drive characteristics (no [Pullup] table).  This warning
         can be silenced by changing the Model_type or by adding a
         [Pullup] table.

This warning should not appear for models of type I/O_open_drain
or of type Open_drain.  This message is not displayed in parser 
version 3.2.5.  

This bug appears to be an improper implementation of BUG34.

INSERT IBIS FILE DEMONSTRATING THE BUG:

|***********************************************************************
|
[IBIS Ver]       3.2
[File Name]      bug53.ibs
[File Rev]       0.0
[Date]           05-January-2001
[Source]         File created from specification
[Notes]          Using the IBISCHK3 v3.2.6 parser, the following file
                 will generate a single warning regarding the lack of
                 a [Pullup] section.  This warning does not appear in
                 the v.3.2.5 parser's output.  
|
[Disclaimer]
    (C) Copyright 2001 Intel Corp.
    All rights reserved
    This model is for demonstration purposes only,
|
[Component]      GENERIC_IBIS
[Manufacturer]   Intel Corp.
|
[Package]
|                typ        min        max
R_pkg            6.0mO      5.0mO      7.0mO
L_pkg            5.0nH      2.0nH      8.0nH
C_pkg            1.0pF      0.5pF      1.5pF
|
|
[Pin]     signal_name      model_name    R_pin    L_pin    C_pin
    1     TestSignal1       TestModel1
|
|************************************************************************
|
[Model]          TestModel1
Model_type       I/O_open_drain
Polarity         Non-Inverting
Vinl = 800mV
Vinh = 2.0V
|
Cref = 10.0pF
Vref = 0.0
Vmeas = 0.4
C_comp                    5.00pF            4.00pF            6.00pF
|
|
[Temperature Range]       27.00             100.00            0.00
[Voltage Range]           5.0V             4.75V              5.25V
|
[Pulldown]
| voltage     I(typ)              I(min)              I(max)
|
  -5.0000      -40.0m          -34.00m           -45.00m
  -4.0000      -39.0m          -33.00m           -43.00m
   0.0000       0.0m             0.00m             0.00m
   5.0000       40.0m            34.0m            45.00m 
  10.0000       45.0m            40.0m            49.00m
|
|
[GND Clamp]
| voltage     I(typ)              I(min)              I(max)
|
  -5.0000    -3900.0mA         -3800.00mA           -4000.00m
  -0.7000      -80.0m            -75.00m              -85.00m
  -0.6000      -22.0m            -20.00m              -25.00m
  -0.5000       -2.4m             -2.00m               -2.90m
  -0.4000        0.0A              0.0A                 0.00A 
   5.0000        0.0A              0.0A                 0.00A
|
[Power Clamp]
| voltage     I(typ)              I(min)              I(max)
|
  -5.0000     4450.00m            NA                   NA
  -0.7000       95.0m             NA                   NA
  -0.6000       23.0m             NA                   NA
  -0.5000        2.4m             NA                   NA
  -0.4000        0.0m             NA                   NA
   0.0000        0.0m             NA                   NA
|
[Ramp]
|variable        typ              min                  max
dV/dt_r          2.20/1.06n       1.92/1.28n           2.49/650p
dV/dt_f          2.46/1.21n       2.21/1.54n           2.70/770p
R_load = 300ohms
|
|
|************************************************************************
[End]
|
| The new v3.2.6 parser gives the following spurious output:
|
|IBISCHK3 V3.2.6
|
|Checking bug53.ibs for IBIS 3.2 Compatibility...
|
|WARNING - [Model] TestModel1 has no description of the buffer's high 
|         state DC drive characteristics (no [Pullup] table).  This 
|         warning can be silenced by changing the Model_type or by 
|         adding a [Pullup] table.
|
|Errors  : 0
|Warnings: 1
|
|File Passed
|
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******************** BELOW FOR ADMINISTRATION AND TRACKING *******************
******************************************************************************

BUG NUMBER:  53

SEVERITY: [FATAL, SEVERE, MODERATE, ANNOYING, ENHANCEMENT]  SEVERE

PRIORITY: [HIGH, MEDIUM, LOW]                               HIGH

STATUS: [OPEN, CLOSED, WILL NOT FIX, NOT A BUG]             CLOSED

FIXED VERSION: Version 3.2.7

FIXED DATE:    March 27, 2001

NOTES ON BUG FIX:  This documents a problem with the BUG34 Fix.

                   Classified and resolved to be fixed at the February 16,
                   2001 IBIS Meeting.

                   Fixed in Version 3.2.7 on March 27, 2001.  BUG34 also
                   Closed.

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