[IBIS] Fork-Endfork in IBIS EBD Models

From: <mhaque_at_.....>
Date: Fri Dec 30 2005 - 13:33:13 PST
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 13:33:21 2005

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