Subject: RE: [IBIS-Users] Pin name assignment
From: Frank Dunlap (fdunlap@netlogicmicro.com)
Date: Fri Jan 31 2003 - 08:29:58 PST
I think that the suggestion to stay with a-z and 0-9 characters (and to start the name
with a-z) is a good, safe idea. I have seen cases, however, where IBIS models used
a trailing "#' to indicated active low. Such signals show up in certain vendor's datasheets and
their IBIS models. Isn't a good idea, though maybe not a requirement, to use the
EXACT same name in the IBIS model as is used in the datasheet, as these vendors
have done?
So, though it's a great suggestion to use just a-z and 0-9, are there any known
issues in using other characters, and, in this case, specifically, "#"?
Thanks,
Frank
-----Original Message-----
From: Abdulrahman Rafiq [mailto:arafiqsi@yahoo.com]
Sent: Friday, January 31, 2003 12:07 AM
To: Eric Hsu; ibis-users@server.eda.org
Subject: Re: [IBIS-Users] Pin name assignment
Hi Eric,
I take it you are trying to create a pin list for an ibis file. You can find information on this in the IBIS Information Specification Ver 3.2 http://www.vhdl.org/pub/ibis/ver3.2/ver3_2.pdf
The number of characters allowed per column in the pinlist section of the ibis model are as followed:
[Pin]: Max 5 characters allowed
signal_name: Max 20 characters allowed
model_name: Max 20 characters allowed
R_pin: Max 9 characters allowed
L_pin: Max 9 characters allowed
C_pin: Max 9 characters allowed
I would suggest avoiding using symbols other than integers (1,2,3,...) and letters (A,B,C,...) in in the [Pin] column.
See the document in the link specified above, it show a sample pinlist section.
Hope this helps.
Thanks,
Abdulrahman Rafiq
Eric Hsu <ehsu@netlogicmicro.com> wrote:
Hi all,
When assigning for pin name, I am not sure there is any limits except column length. of character. For example, if naming by "#", "", "(xxx)", "!", or even "%"? In case they can pass by "ibischk3", does it also mean they are acceptable by any commercial simulation tool as long as it can accept IBIS format?
Best Regard,
Eric
NetLogic Microsystems, Inc.
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