126.96.36.199. Generate Custom IBIS Models with the IBIS Writer
Examples of custom assignments include drive strength settings or the enabling of clamping diodes for ESD protection. IBIS models created with the IBIS Writer take I/O assignment settings into account.
If the Enable Advanced I/O Timing option is turned off, the generated .ibs files are based on the load value setting for each I/O standard on the Capacitive Loading page of the Device and Pin Options dialog box in the Device dialog box. With the Enable Advanced I/O Timing option turned on, IBIS models use an effective capacitive load based on settings found in the board trace model on the Board Trace Model page in the Device and Pin Options dialog box or the Board Trace Model view in the Pin Planner. The effective capacitive load is based on the sum of the Near capacitance, Transmission line distributed capacitance, and the Far capacitance settings in the board trace model. Resistance values and transmission line inductance values are ignored.
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