Sujit, Please search the archives. I am sure you will find some answers, as I have explained this about a zillion of times on these email forums. Another alternative is to get help from the free IBIS model review committee. http://www.eigroup.org/ibis/support.htm mailto:lgreen22@mindspring.com Arpad ================================================= ________________________________ From: owner-ibis-users@server.eda.org [mailto:owner-ibis-users@server.eda.org] On Behalf Of Sujit Kumar-r65837 Sent: Thursday, January 25, 2007 5:58 AM To: ibis-users@server.eda.org Subject: [IBIS-Users] ibschk- warnings hi ibis experts ibschk run on an ibis generates following warnings: IBISCHK4 V4.0.2 Checking ddr.ibs for IBIS 4.0 Compatibility... WARNING (line 219) - GND Clamp Typical data is non-monotonic WARNING (line 219) - GND Clamp Minimum data is non-monotonic WARNING (line 219) - GND Clamp Maximum data is non-monotonic WARNING - Model io_pu0_pk1_ddr0_lo: The [Rising Waveform] with [R_fixture]=50 Ohms and [V_fixture]=0V has TYP column DC endpoints of 0.00V and 0.18v, but an equivalent load applied to the model's I-V tables yields different voltages ( 0.01V and 0.18V), a difference of 4.10% and 3.91%, respectively. WARNING - Model io_pu0_pk1_ddr0_lo: The [Falling Waveform] with [R_fixture]=500 Ohms and [V_fixture]=1.8V has TYP column DC endpoints of 0.47V and 1.80v, but an equivalent load applied to the model's I-V tables yields different voltages ( 0.50V and 1.80V), a difference of 2.18% and 0.00%, respectively. WARNING - Model io_pu0_pk1_ddr0_lo: The [Rising Waveform] with [R_fixture]=500 Ohms and [V_fixture_min]=0V has MIN column DC endpoints of 0.00V and 0.96v, but an equivalent load applied to the model's I-V tables yields different voltages ( 0.02V and 0.96V), a difference of 2.14% and 0.59%, respectively. WARNING - Model io_pu0_pk1_ddr0_lo: The [Rising Waveform] with [R_fixture]=50 Ohms and [V_fixture_min]=0V has MIN column DC endpoints of 0.00V and 0.12v, but an equivalent load applied to the model's I-V tables yields different voltages ( 0.01V and 0.13V), a difference of 4.58% and 4.47%, respectively. WARNING - Model io_pu0_pk1_ddr0_lo: The [Falling Waveform] with [R_fixture]=500 Ohms and [V_fixture_min]=1.65V has MIN column DC endpoints of 0.64V and 1.65v, but an equivalent load applied to the model's I-V tables yields different voltages ( 0.67V and 1.65V), a difference of 2.83% and 0.00%, respectively. WARNING - Model io_pu0_pk1_ddr0_lo: The [Rising Waveform] with [R_fixture]=50 Ohms and [V_fixture_max]=0V has MAX column DC endpoints of 0.00V and 0.24v, but an equivalent load applied to the model's I-V tables yields different voltages ( 0.01V and 0.25V), a difference of 3.89% and 3.60%, respectively. WARNING - Model io_pu0_pk1_ddr0_lo: The [Falling Waveform] with [R_fixture]=500 Ohms and [V_fixture_max]=1.95V has MAX column DC endpoints of 0.39V and 1.95v, but an equivalent load applied to the model's I-V tables yields different voltages ( 0.42V and 1.95V), a difference of 2.06% and 0.01%, respectively. Errors : 0 Warnings: 10 File Passed i have following queries: > what could be the possible reason for such warnings ? > as file is passing throgh ibschk, so can i neglect the above warnings ? pls suggest. .s2i and ibs file are attached for reference. -- thanks sujit kumar +91-120-4396069 +91-09910168788 <mailto:sujit@freescale.com> -- This message has been scanned for viruses and dangerous content by MailScanner <http://www.mailscanner.info/> , 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 Thu Jan 25 08:21:33 2007
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