Hi Experts, I am getting the following warnings while running ibischk3 on the buffer models. WARNING - Model 'bsppon3mchpt3v3_p': TYP VI curves cannot drive through Vmeas=0.6V given load Rref=1e+09 Ohms to Vref=0V WARNING - Model 'bsppon3mchpt3v3_p': MIN VI curves cannot drive through Vmeas=0.6V given load Rref=1e+09 Ohms to Vref=0V WARNING - Model 'bsppon3mchpt3v3_p': MAX VI curves cannot drive through Vmeas=0.6V given load Rref=1e+09 Ohms to Vref=0V Our buffer models will be operating at 2 voltages coreside voltage and pad side voltage. In this case, coreside voltage(VDD) is 1.2 v and pad side voltage(VDDE) is 2.5v. So in V-t waveforms 1. Rising waveform with R_fix connected to VDDE(2.5v): waveforms are varying from 1.249v to 2.5v 2. Falling waveform with R_fix connected to VDDE(2.5v):waveforms are varying from 2.5v to 1.254v I have a confusion regarding the selection of Vmeas. Should it be half of corevoltage(1.2/2) or half of pad voltage (2.5/2)? Please let me know how this parameter is used in the application (may be in SI or somewhere else). I even changed Vmeas to 1.25 V. Still I am getting warnings like WARNING - Model 'bsppon3mchpt3v3_p': TYP VI curves cannot drive through Vmeas=1.25V given load Rref=1e+009 Ohms to Vref=0V WARNING - Model 'bsppon3mchpt3v3_p': MIN VI curves cannot drive through Vmeas=1.25V given load Rref=1e+009 Ohms to Vref=0V WARNING - Model 'bsppon3mchpt3v3_p': MAX VI curves cannot drive through Vmeas=1.25V given load Rref=1e+009 Ohms to Vref=0V Please let me know your answers. Best Regards, Sudarshan HN NXP Semiconductors/CTO /PLT # 1 Murphy Road, Ulsoor, Bangalore - 560 008 , India. Ph:+91-80-40247073 Fax: +91-80-4024 7855 seri:sudarsha@inpsblr E-mail: sudarshan.honnudike@nxp.com -------------------------------------------------------------------- |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 Tue Nov 7 21:25:16 2006
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