Hello, Akilesh, These are the input voltages at which the receiver output toggles into a valid state, and by when it drops out of a valid state. Normally, these are specified on the I/O data sheet. If Vinh+=Vinh-, then only Vih is used in the model. Likewise, if Vinl+=Vinl-, then only Vil is used. Best regards, Lynne _____ From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On Behalf Of Akhilesh CHANDRA Sent: Monday, February 20, 2006 4:02 AM To: Lynne D. Green Cc: 'ibis-users'; 'ibis'; Akhilesh CHANDRA Subject: Re: [IBIS-Users] How I can extract two value for vinh and vinl Hello Lynne, Thanx for your reply. For VInh and Vinl it's OK. I have problem to extract VINH+, VINH-, VINL+ & VINL- values. How can I extract these values on one PVTSC by simulation. Regards Akhilesh Lynne D. Green wrote: Hello, Akilesh, The interconnect specification (such as TTL or PCI) specifies the I/O characteristics, including Vinh and Vinl. For example, if I remember correctly, TTL specifications are Vinl=0.8V and Vinh=2.0V. If you are not using a standard interconnect, then see my paragraph about PVT simulations. Best regards, Lynne -----Original Message----- From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On Behalf Of Akhilesh CHANDRA Sent: Thursday, February 02, 2006 7:39 PM To: Lynne D. Green Cc: 'ibis-users'; 'ibis'; Akhilesh CHANDRA Subject: Re: [IBIS-Users] How I can extract two value for vinh and vinl Hello Lynne, I am not able to understand how these values come from interconnect specification. I am also not able to understand what is externel specification. In my view I have a spice netlist and run our simulation to extract VINH and VINL. According to me one design have one VINH and one VINL value at one process, voltage and temp. How I can extract two value of VINH and VINL at one process voltage and temp. Please correct if I am wrong. Regards Akhilesh Lynne D. Green wrote: Hello, Akilesh, These values normally come from the interconnect specification. If there are no parameters equivalent to Vinh+, Vinh-, Vinl+ & Vinl-, then these parameters are not used in the IBIS model. If you are not following an external specification, then you need to do a complete PVT (process, voltage, temperature) analysis for Vinh and Vinl (not just one corner). - 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 -----Original Message----- From: owner-ibis-users@eda.org [mailto:owner-ibis-users@eda.org] On Behalf Of Akhilesh CHANDRA Sent: Thursday, February 02, 2006 2:24 AM To: ibis-users; ibis Cc: akhilesh chandra Subject: [IBIS-Users] How I can extract two value for vinh and vinl Hi, I have just one query. According to the IBIS specification we can support Vinh+, Vinh-, Vinl+ & Vinl-. I extract these valuse by applying one pulse at the input and find out the voltage at which it switch from 0->1 and 1->0. According to me I have only one value at one process, voltage temp. How I can extract two value for vinh and vinl for one process, voltage and temp. Regards Akhilesh |------------------------------------------------------------------ |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 1993 |------------------------------------------------------------------ |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 1993 |------------------------------------------------------------------ |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 1993 |------------------------------------------------------------------ |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 1993 |------------------------------------------------------------------ |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 Tue Feb 21 14:45:37 2006
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