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If the source device cannot supply voltage between the minimum and maximum voltages set by pins ADCIN1 and ADCIN2 ORthe operating/maximum current is violated, then the controller will signal a capabilities mismatch and run the CAP_MIS pin high.
Schematic
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Rapid fire notes on the USB PD IC schematic:
TVS2200 for 20V model, clamping begins at 22V. TVS1400 for 12V model, clamping begins at 14V.
the LDO_3V3 output pin from the IC is linked to the GPIO pins (e.g. PLUG_FLIP), and can only supply max 5mA, with 1mA max per GPIO pin
I2C line is likely to be unused and will be DNP’ed during assembly. The PD IC is not V/I configurable through I2C as well.