Re: Problems noted with posted v3.2.6 parser -- requires BUG filing?

Michael:

It appears that BUG34 may have been implemented incorrectly.
Thank you for reporting this.

This will be filed as BUG53. As we check ibischk3.2.6,
we might issue ibischk3.2.7 to correct any problems found.

Bob Ross
Mentor Graphics

"Mirmak, Michael" wrote:
>
> The most recent edition of the parser (v.3.2.6, DOS32) seems to have a
> problem
> with models which lack a [Pullup] keyword. It flags models which
> have a Model_type of I/O_open_drain, which would not require [Pullup].
>
> I've enclosed an IBIS model below to demonstrate the warning. Is this
> warning intentional? Should this problem be filed as BUG53?
>
> Thanks!
>
> - Michael Mirmak, Intel Corp.
>
> |***********************************************************************
> |
> [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
> |
> |
> |
 
Received on Mon Jan 8 16:02:22 2001