RE: [IBIS-Users] Mixed-Signal Analog IO ?

Lars,

I think you are asking the question in the right
forum.  However, I don't understand your question.
To include a clamp, you don't have to make it an
input, every buffer type can have clamp tables.
Especially if you do it using the *-AMS languages,
you can do it any whichever way you want.  So I
am not sure what you are asking really, or how
to answer the question.  Please explain it better.

On the other hand, I wouldn't put clamp tables on
power pins, it doesn't make any sense...  Clamps
are supposed to clamp overshoot on signal pins.
What would they do on power pins?

Arpad
==================================================


-----Original Message-----
From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On Behalf Of Lars Snith
Sent: Monday, August 15, 2005 11:22 PM
To: ibis-users@eda.org
Subject: [IBIS-Users] Mixed-Signal Analog IO ?

Hello,

I hope I am adressing the right forum with this. If not, please excuse 
my intrusion.

I have been making a number of IBIS models for microcontrollers of 
medium complexity, successfully as it looks.
As I will soon take on more complex products, with purely analog parts, 
I have been considering the "correct" way of modeling a truly analog IO 
(if at all).
Clearly, to include the power clamps I should treat it as an input. On 
the other hand this might not be the correct procedure, maybe it would 
be better to treat it as a power/ground pin? It would certainly mean 
less work. A third option is to ignore it altogether (NA).

Any comment/feedback on this issue would be most welcome.


Best regards,  Lars Snith
-- 
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