RE: [IBIS-Users] IBIS Question

From: Muranyi, Arpad <arpad.muranyi_at_.....>
Date: Thu Jul 28 2005 - 09:35:59 PDT
Andy,
 
Sorry for the "canned" answer but such tool specific questions
are best if directed to the vendor...  To be honest, I don't know
these details about these tools, and I don't want to give you
misleading answers.  Plus, the answers may not be a simple yes or
no either.
 
Arpad
==================================================================

________________________________

From: Andy Joe [mailto:andy_joe123@yahoo.com] 
Sent: Wednesday, July 27, 2005 5:59 PM
To: Muranyi, Arpad; ibis-users@eda.org
Subject: RE: [IBIS-Users] IBIS Question


Thanks Arpad...
Can Mentor and Cadence tool vendors give comment about this if the tools applied the package RLC value to the power and ground pins as well? If not, may I know how the tools handle the effect caused by package parasitic i.e. IR drop?
Thanks.
-Andy

"Muranyi, Arpad" <arpad.muranyi@intel.com> wrote:

	Andy,
	 
	The problem is that the IBIS spec doesn't spell out that
	the package parameters are also to be applied to power
	and GND pins.  In my opinion they should be used for those
	too, but it doesn't mean that all tool vendors do it.
	 
	Arpad
	===========================================================

________________________________

	From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On Behalf Of Andy Joe
	Sent: Wednesday, July 27, 2005 4:18 AM
	To: ibis-users@eda.org
	Subject: [IBIS-Users] IBIS Question
	
	

	Hi,

	 

	I have a question regarding the [Package] keyword in an IBIS file. As far as I am concerned, the RLC values in this section applied to all the I/O pins, my question is if these RLC values also applied to power and ground pins as well? If they are not applied to power and ground pins, how can we address the effects of different packages to the power and ground pins in an IBIS model? (If R_pin, L_pin and C_pin for every single pin are not available, only package min, typ and max RLC are available)

	Thanks.

	 

	-Andy

	
________________________________

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________________________________

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Received on Thu Jul 28 09:36:04 2005

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