Power-on and Shut-down Signaling
A power source must be available at either the DC input jack or the USB Type-C connector, which both connect to the power mux, before power on can be initiated.
Closing SW2 pulls PMIC_PWRBTN_N low, enabling the module to begin the power-on logic sequence. PMIC_PWRBTN_N is also connected to the module on J2 pin 9.
Refer to Power Delivery, Signaling, and Reset for power button behaviors.