[ibis-macro] Re: jitter parameter usage in the proposed BIRD
- From: <fangyi_rao@xxxxxxxxxxx>
- To: <wkatz@xxxxxxxxxx>, <ibis-macro@xxxxxxxxxxxxx>
- Date: Thu, 10 Dec 2009 12:35:39 -0700
Hi, Walter;
Thanks for your clarification. Based on your reply I think we should make it
clear in the BIRD that if the .ami file specifies jitter usage is In or InOut,
EDA tool should assume model handles jitter in GetWave if it exists.
Fangyi
From: Walter Katz [mailto:wkatz@xxxxxxxxxx]
Sent: Thursday, December 10, 2009 3:32 AM
To: RAO,FANGYI (A-USA,ex1); ibis-macro@xxxxxxxxxxxxx
Subject: RE: [ibis-macro] jitter parameter usage in the proposed BIRD
Fangyi,
Jitter can be handled by the simulator as it sees fit. I can be put on the
stimulus, or it can be used when processing the results. IBIS AMI does not tell
the EDA tool how to incorporate Jitter, it just expresses to the EDA tool how
much there is. SO the AMI standard should not tell the EDA tool how to use it.
IC Vendors can choose how to describe to the EDA tool how much Jitter there is.
An IC Vendor can choose to implement components of Jitter in their model. This
Jitter can be hard coded within the model, are passed into the model as a Usage
In parameter if it is configurable.
Walter
Walter Katz
303.449-2308
Mobile 720.333-1107
wkatz@xxxxxxxxxx
www.sisoft.com
-----Original Message-----
From: ibis-macro-bounce@xxxxxxxxxxxxx
[mailto:ibis-macro-bounce@xxxxxxxxxxxxx]On Behalf Of fangyi_rao@xxxxxxxxxxx
Sent: Wednesday, December 09, 2009 10:05 PM
To: ibis-macro@xxxxxxxxxxxxx
Subject: [ibis-macro] jitter parameter usage in the proposed BIRD
Hi, Walter;
Is my understanding of the usage of jitter reserved parameter in your new BIRD
correct?
Tx jitter
if GetWave exists
Usage Info/Out: jitter added by simulator
Usage In/InOut: jitter added by model dll
if no GetWave
always added by simulator
Rx jitter
if GetWave exists and returns clock ticks
Info/Out: jitter added by simulator
In/InOut: jitter added by model dll
if no GetWave, or GetWave exists but doesn't return clock ticks
always added by simulator
Thanks,
Fangyi
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