[IBIS-Users] How to use ICM along with IBIS?

Hello IBIS experts,

I am trying to wrap S-parameter package model in ICM and use .icm file along with .ibs. However I couldn't find any information on how to bridge the two files neither within IBIS spec nor within ICM spec. Can anyone point me to the correct instruction file or maybe provide me an example?

The 2nd question is whether or not IBIS and ICM can have different number of pins. For example, in IBIS we have 4 pins, P, N, VDD and GND. In ICM we have information for only two pins, P and N. How do I tell IBIS that ICM only models pin P and N, not all 4 pins.

The last question is although ICM has information for pin P and N only, it contains 4 pins actually, P_in, P_out, N_in and N_out. How does IBIS or EDA tool differentiate between internal pins (pins that connect pads, P_in & N_in) and external pins (pins that connect to ball on package, P_out & N_out) listed in ICM?

thanks,
Wei Zhang
Broadcom Corp.

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