another new parser question ibischk3 V3.2.6

From: Syed Huq <shuq@cisco.com>
Date: Tue Jan 09 2001 - 21:59:37 PST

Dear Gurus:

I am quite amazed by the amount of information the parser reports.
Let me explain and I would like to understand the reasons too:

1) For every pin of this 456BGA package, it reports that the R_pin, L_pin
and C_pin are missing. I already know this simply by opening the IBIS file
and looking at the [Pin] list section.

Why do I need to scroll thru all these:
.
<parser output>
.
PIN:signal_name:<DQ[71]>
PIN:model_name:<XYZ_IO>
PIN:R_Pin:NOT SET
PIN:L_Pin:NOT SET
PIN:C_Pin:NOT SET
PIN:Pin:<A3>
PIN:signal_name:<VDDQ>
PIN:model_name:<POWER>
PIN:R_Pin:NOT SET
PIN:L_Pin:NOT SET
PIN:C_Pin:NOT SET
PIN:Pin:<A4>
PIN:signal_name:<DQ[67]>
PIN:model_name:<XYZ_IO>
PIN:R_Pin:NOT SET
PIN:L_Pin:NOT SET
PIN:C_Pin:NOT SET
.
.

2) Why does the parser output print all the V/I and V/T table data ?
.
Pulldown:
Voltage:-2.5, Typ:-0.12, Min:-0.09518, Max:-0.13
Voltage:-2.3, Typ:-0.12, Min:-0.09518, Max:-0.13
Voltage:-2.1, Typ:-0.12, Min:-0.09518, Max:-0.13
.
.

3) Why does the parser not show the value of Cref clearly defined in
the IBIS model ?

Parser:
Model Name:XYZ_TRI
Model_type:3-state
Polarity:Non-Inverting
Enable:Active-High
Vinl:NOT SET
Vinh:NOT SET
Vmeas:1.500000
Cref:0.000000 <------ ??

IBIS:
[Model] XYZ_TRI
Model_type 3-state
Polarity Non-Inverting
Enable Active-High
Vmeas = 1.50V
Cref = 50.00pF <------ It's there ..

4) Why does the parser not show the dT values for Ramp ?

<parser output>
dV/dt_r:Typ:1.150000/0.000000, Min:0.820000/0.000000, Max:1.280000/0.000000
dV/dt_f:Typ:1.250000/0.000000, Min:1.050000/0.000000, Max:1.360000/0.000000

IBIS model:
dV/dt_r 1.15/0.31n 0.82/0.37n 1.28/0.22n
dV/dt_f 1.25/0.22n 1.05/0.32n 1.36/0.15n

5) Is there a switch a user could use to minimize a lot of these messages ?

Regards,
Syed

 
Received on Tue Jan 9 22:03:22 2001

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