The J7 Type-C connector accepts a 5 VDC level and is capable of delivering a maximum of 3 A into the expansion board. J7 pins A4, B4, A9 and B9, are +VBUS; J7 pins A1, B1, A12, B12 are ground.
The 4 positive voltage input lines are common on the expansion board and become +VBUS_USB3, which is conditioned to become +VBUS going into the power mux.
+VBUS is also connected to the module at J3 pin 1 as the USB adapter connection sense line.
When powering the expansion board from a USB PD charger/adaptor only capable of 5 volt output, workloads executing must not exceed a total current consumption of 3.0 amps, including any mezzanine boards and peripheral devices attached to it.
When powering the expansion board from a USB PD charger/adaptor capable of 9 volt output, the BIOS automatically negotiates PD output voltage from 5 volt to 9 volt operation.
At VBUS pin of Type-C connector
|VBUS2||9||12.4||V||At VBUS pin of Type-C connector|
The USB power system, OTG, and interface details are covered in USB Type-C with OTG (J7)