All I/O are 3.3V unless otherwise specified.
GP_Out_x - are driven outputs and can sink or source 12mA
GP_In_x - VIH (Input High Voltage minimum) = 2V. No pullup or
pulldown is pre-configured, user discretion to add externally if
required for their application.
PWM_Out_x - are driven outputs and can sink or source 24mA
3V3 Power output can provide up to 1A of current.