I followed the example of PERC LDL CD/P2P and applied to my design. The example is to check current density and point-2-point resistance from IO pad to Power and Gnd for the ESD-1st. In my design, I use the n type diode for the down diode and the hia diode (high current diode) for the up diode. However, the result is that no pin pairs match experiment: io2pwr.full_path. This means the tool cannot recognize the up diode (IO --> VDD) or in the other words, the hia diode is not seen as a normal diode. How do I deal with this case ?
Thanks and Best Regards