RE: [IBIS-Users] Fork-Endfork in IBIS EBD Models

From: Tom Dagostino <tom_at_.....>
Date: Fri Dec 30 2005 - 13:51:04 PST
There is a great example of this in the EBD section of the IBIS
specification, its a good read.

Also, you can always make a prototype file and pass it by the IBIS Golden
Parser.  Which is a good idea whenever you create an IBIS file.

Tom Dagostino
Teraspeed(R) Labs
13610 SW Harness Lane
Beaverton, OR 97008
503-430-1065
tom@teraspeed.com
www.teraspeed.com

Teraspeed Consulting Group LLC
121 North River Drive
Narragansett, RI 02882
401-284-1827

-----Original Message-----
From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org]On
Behalf Of mhaque@micron.com
Sent: Friday, December 30, 2005 1:33 PM
To: ibis-users@eda.org; ibis@eda.org
Subject: [IBIS-Users] Fork-Endfork in IBIS EBD Models


Hi All,
When creating IBIS EBD model for multi die package, is multiple fork and
endfork statement allowed for one main branch? For example if the device
has 4 die and from each pad bondwires are connected to one external ball
is it okay to describe the path description as below?

Note the last fork-endfork statement. Is it necessary that the original
path needs to be continued and therefore the path description has to end
with a series path?

[Path Description] QUAD_DIE_SIGNAL
A1
Len=0 R=16.646m L=1.406n C=0.456p /      |Substrate R, L and C

Fork
Len=0 R=10m L=1nH C=1p /             |Bondwire r,l,c from pin A1 to U1,
pad #21
Endfork
Node U1.21

Fork
Len=0 R=10m L=1nH C=1p /             |Bondwire r,l,c from pin A1 to U2,
pad #21
Endfork
Node U2.21

Fork 				|Bondwire r,l,c from pin A1 to U3, pad
#21
Len=0 R=10m L=1nH C=1p
Endfork
Node U3.21

Fork 				|Bondwire r,l,c from pin A1 to U4 , pad
#21
Len=0 R=10m L=1nH C=1p
Endfork
Node U4.21

Best Regards
Moshiul Haque
Micron Technology Inc.

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Received on Fri Dec 30 13:51:14 2005

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