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 -- \!/ ^ (<@ @>) ! v ---" "-----" "-------------------------. 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: +91-124-2303212 Ext.1321........ ---------------------------------------- ___________________ 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 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 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 1993 ----------------------------------------------------------------- |For help or to subscribe/unsubscribe, email majordomo@eda.org |with 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 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 Wed Feb 16 12:36:24 2005
This archive was generated by hypermail 2.1.8 : Wed Feb 16 2005 - 12:37:52 PST