Henrik's suggestions work, with one caveat. If you use Option 3 (both connected, two models), each model must include the total C_comp for BOTH analog and digital buffers to get the correct pad loading. This will give more accurate reflection during simulation. The total C_comp is also needed for Option 1, but it is easier since there is only one model. Best regards, Lynne "IBIS training when you need it, where you need it." Dr. Lynne Green Green Streak Programs http://www.greenstreakprograms.com 425-788-0412 lgreen22@mindspring.com _____ From: owner-ibis@eda.org [mailto:owner-ibis@eda.org] On Behalf Of Henrik Madsen Sent: Friday, April 20, 2007 2:38 AM To: Sudarshan Honnudike; ibis@eda-stds.org Subject: RE: [IBIS] How to connect single pin to multiple pads in IBIS Hi It depends on what you want to do. 1) If the analog cell and the output cell are connected to the same pin at the same time, you need to create a special IBIS driver model containing both the analog and output cell. 2) If it is two different bond options/versions, you need to create two different component models, either in two different files or in the same file. 3) If you by some kind of selection can select between the two different cells (like for instance programable output drive strength), then you should use the [Model Selector] keyword to select between the analog and output cell. Regards /Henrik _____ From: owner-ibis@server.eda.org [mailto:owner-ibis@server.eda.org] On Behalf Of Sudarshan Honnudike Sent: Friday, 20 April, 2007 11:20 To: ibis@server.eda-stds.org Subject: [IBIS] How to connect single pin to multiple pads in IBIS Hello Everybody, One of my customer is facing problem with the connecting a single pin to multiple pads(different models). Actually he is connecting an analog cell and output cell to a single pin on the package. How this has to be done in [pin] section of IBIS ? How to associate 2 models for single pin in IBIS ? Let me know your response. Best Regards, Sudarshan HN NXP Semiconductors/CTO /PLT C-4, Manyata Tech Park, Nagawara Bangalore-560 045 , India. Ph:+91-80-40247073 Fax: +91-80-4026 7855 seri:sudarsha@inpsblr E-mail: sudarshan.honnudike@nxp.com -- This message has been scanned for viruses and dangerous content by <http://www.mailscanner.info/> MailScanner, and is believed to be clean. -- This message has been scanned for viruses and dangerous content by <http://www.mailscanner.info/> MailScanner, and is believed to be clean. -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. -------------------------------------------------------------------- |For help or to subscribe/unsubscribe, e-mail majordomo@eda-stds.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 e-mail a request to ibis-request@eda-stds.org. | |IBIS reflector archives exist under: | | http://www.eda-stds.org/pub/ibis/email_archive/ Recent | http://www.eda-stds.org/pub/ibis/users_archive/ Recent | http://www.eda-stds.org/pub/ibis/email/ E-mail since 1993Received on Fri Apr 20 10:51:02 2007
This archive was generated by hypermail 2.1.8 : Fri Apr 20 2007 - 10:52:37 PDT