For up to eight inches of trace length on the carrier card, the recommendation is to use a 4 mA drive strength and a slow slew rate for all MIO and HDIO signals. When trace lengths on the carrier card are longer than eight inches, signal integrity simulations might be necessary to select the correct drive strength and proper termination.
Recommended: For MIO
signals that are local to the SOM on MIO bank 500 and part of MIO bank 501, the
recommendation is to use a 4 mA drive strength and slow slew rate.
For I/O modeling, including drive strength settings, the Zynq UltraScale+ MPSoC IBIS models can be downloaded from the AMD website.