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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 ibis-bug@eda.org.

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

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PARSER VERSION NUMBER: 4.2.0

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

OS AND VERSION: Microsoft Windows XP Professional SP2

REPORTED BY: Michael Mirmak, Intel Corp.

DATE: April 16, 2008

DESCRIPTION OF BUG: 
The IBIS specification clearly states that, for multi-lingual models,
"parameter passing is not supported in SPICE."  The optional "Parameters"
subparameter is implied to be illegal when the "Language" subparameter
is "SPICE".

However, the parser does not issue a warning or error if the "Parameters"
subparameter is used with a SPICE model (the enclosed IBIS file results
in no warnings or errors from the parser).

Either the parser should flag this usage, or the specification should be
updated to state that "not supported" means "may be ignored".  Realistically, 
existing simulation tools may take advantage of SPICE language integration 
into IBIS to support proprietary SPICE variants other than Berkeley SPICE 3F5.
Though contrary to the intent of the specification, simply generating a
warning for the presence of "Parameters" with SPICE models will preserve
this functionality while also maintaining the parser's role of reporting 
on specification syntax violations.

IBIS FILE DEMONSTRATING THE BUG:

|=============================================================================
[IBIS Ver]      4.2
[File Name]     bug101.ibs
[File Rev]      1.0      
[Date]          April 16, 2008
[Source]        Put originator and the source of information here.  
[Notes]         Use this section for any special notes related to the file.
|
[Disclaimer]    This information is for modeling purposes only, and is not
                guaranteed.                     
[Copyright]     None.  Freely redistributable.
|=============================================================================
[Component]     ExampleBug
[Manufacturer]  Them Corp.
|
|=============================================================================
[Package]
| variable      typ             min             max
R_pkg           250.0m          225.0m          275.0m
L_pkg           15.0nH          12.0nH          18.0nH
C_pkg           18.0pF          15.0pF          20.0pF
|-----------------------------------------------------------------------------
[Pin]   signal_name     model_name      R_pin   L_pin   C_pin
|
  1     Example         ExBufferSPICE
|-----------------------------------------------------------------------------
|
[Model] ExBufferSPICE
Model_type I/O
Vinh = 2.0
Vinl = 0.8
Vref = 3.3
Rref = 50
Vmeas = 1.65
|                 typ     min    max
[Voltage Range]   3.3     3.0    3.6
|
[Ramp]
dV/dt_r        1.57/0.36n   1.44/0.57n   1.73/0.28n
dV/dt_f        1.57/0.35n   1.46/0.44n   1.68/0.28n
|
[External Model]
Language SPICE
|
| Corner corner_name file_name       circuit_name (.subckt name)
Corner    Typ         buffer_typ.spi  buffer_io_typ
Corner    Min         buffer_min.spi  buffer_io_min
Corner    Max         buffer_max.spi  buffer_io_max
|
| Parameters - Not supported in SPICE
Parameters illegal1 illegal2 illegal3
|
| Ports List of port names (in same order as in SPICE)
Ports A_signal my_drive my_enable my_receive my_ref
Ports A_puref A_pdref A_pcref A_gcref A_extref
|
| D_to_A d_port   port1     port2    vlow vhigh trise tfall corner_name 
D_to_A   D_drive  my_drive   my_ref   0.0  3.3  0.5n  0.3n   Typ
D_to_A   D_enable my_enable  A_gcref  0.0  3.3  0.5n  0.3n   Typ
|
| A_to_D d_port    port1       port2       vlow  vhigh  corner_name 
A_to_D   D_receive  my_receive  my_ref  0.8   2.0    Typ 
|
|
[End External Model]
|
[End]



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******************** BELOW FOR ADMINISTRATION AND TRACKING *******************
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BUG NUMBER: 101

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

PRIORITY: [HIGH, MEDIUM, LOW]                               LOW

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

FIXED VERSION:

FIXED DATE:

NOTES ON BUG FIX:  Classified at the April 25, 2008 IBIS Teleconference
                   Meeting.  To be fixed at the next bug fix release.


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