https://community.nxp.com/t5/i-MX-Processors/IBIS-Model-Missing-Differential-Pair-Description-RT685/m-p/2080160#M236291 <P>I'm trying to run Hyperlynx simulations using the IBIS model provided by NXP for the RT685- FOWLP249 and there are no differential pairs defined in the files. Balls U2 and T1 should be USB0_DP and USB0_DM respectively, but these are defined as "NC" in the IBIS file, which causes the simulation to fail. Does anyone have experience with changing these to diff pairs? Here's a cut and paste from the IBIS file:</P><P>&nbsp;</P><P>U2 USB0_DP NC 0.49555 2.721e-09 6.162e-13</P><P>T1 USB0_DM NC 0.50751 2.703e-09 6.205e-13</P> Mon, 14 Apr 2025 17:44:55 GMT mkoven1226 2025-04-14T17:44:55Z https://community.nxp.com/t5/i-MX-Processors/IBIS-Model-Missing-Differential-Pair-Description-RT685/m-p/2080160#M236291 <P>I'm trying to run Hyperlynx simulations using the IBIS model provided by NXP for the RT685- FOWLP249 and there are no differential pairs defined in the files. Balls U2 and T1 should be USB0_DP and USB0_DM respectively, but these are defined as "NC" in the IBIS file, which causes the simulation to fail. Does anyone have experience with changing these to diff pairs? Here's a cut and paste from the IBIS file:</P><P>&nbsp;</P><P>U2 USB0_DP NC 0.49555 2.721e-09 6.162e-13</P><P>T1 USB0_DM NC 0.50751 2.703e-09 6.205e-13</P> Mon, 14 Apr 2025 17:44:55 GMT https://community.nxp.com/t5/i-MX-Processors/IBIS-Model-Missing-Differential-Pair-Description-RT685/m-p/2080160#M236291 mkoven1226 2025-04-14T17:44:55Z https://community.nxp.com/t5/i-MX-Processors/IBIS-Model-Missing-Differential-Pair-Description-RT685/m-p/2103768#M237550 <P>Also looking to see if there is a possibility to run aggressor simulations on this USB pair with either a working IBIS model for this part or a similar part.</P> Fri, 23 May 2025 21:39:45 GMT https://community.nxp.com/t5/i-MX-Processors/IBIS-Model-Missing-Differential-Pair-Description-RT685/m-p/2103768#M237550 mkoven1226 2025-05-23T21:39:45Z