Thanks Arpad for the reply. I got my answer. |For the internal reference case, you could get by with making |the model as if it was single ended, and define the Vinh and |Vinl values around the internally generated reference voltage. Can I use [model spec] to define my Vinl and Vinh for typ, min and max cases since it will give me a range for all the three cases? If yes, Can I use only vinh, vinl sub-parameters in [model spec] ? With warm regards, Mithlesh Muranyi, Arpad wrote: >Mithlesh, > >I can't think of a better way than using a comment character >with the [Diff Pin] keyword. I know this is not optimal, but >we can't make the [Diff Pin] part of the [Model Selector], >which seems to be what you really would need for your receiver. > >For the internal reference case, you could get by with making >the model as if it was single ended, and define the Vinh and >Vinl values around the internally generated reference voltage. > >Arpad Muranyi >Intel Corporation >=============================================================== > >-----Original Message----- >From: owner-ibis@eda.org [mailto:owner-ibis@eda.org] On Behalf Of Mithlesh Shrivas >Sent: Monday, February 14, 2005 10:01 PM >To: ibis >Cc: ibis-users >Subject: [IBIS] query on modelling of diff pin for programmable buffers! > >Hi, > >I am working on writing ibis model for a programmable I/O buffer which >can be programmed to work both as cmos input and differential input. If >I model it as diff pin, it will always be treated as differential input >even if programmed for cmos input. So, I am not able to understand how >to model it. This buffer is always cmos output. > >Also, this buffer can be programmed to have an internal reference as >inverting input. So, there may not be a pin on package which acts as >inverting pin. In this case what do I declare as inverting pin? > >It will help me a lot if you could respond and explain with an example. > >Warm Regards, >Mithlesh > > > -- ---" "----------------------------" "--. Mithlesh Shrivas (Core-id:R64034)....... Design Engineer......................... Freescale Semiconductor India Pvt. Ltd.. Express Trade Towers.................... Floor Nos. 5, 6 & 7, Plot# 15 & 16...... Sector- 16A, Noida- 201301 U.P. (India). Mobile: +91-9811824928.................. Office: +91-120-539-6149 (extn)........ ---------------------------------------- ___________________ POPI Classification: =================== Unless specified this is a General Business Information. [ ] Freescale Internal Use Only [ ] Freescale Confidential Proprietary |------------------------------------------------------------------ |For help or to subscribe/unsubscribe, email majordomo@eda.org |with just the appropriate command message(s) in the body: | | help | subscribe ibis <optional e-mail address, if different> | subscribe ibis-users <optional e-mail address, if different> | unsubscribe ibis <optional e-mail address, if different> | unsubscribe ibis-users <optional e-mail address, if different> | |or email a written request to ibis-request@eda.org. | |IBIS reflector archives exist under: | | http://www.eda.org/pub/ibis/email_archive/ Recent | http://www.eda.org/pub/ibis/users_archive/ Recent | http://www.eda.org/pub/ibis/email/ E-mail since 1993Received on Fri Feb 18 03:37:47 2005
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