USB Power Brick Detection
USB Vbus
USB D+(220kΩ shunt to ground)
USB D+(220kΩ shunt to vcc)
USB D-(220kΩ shunt to ground)
USB D-(220kΩ shunt to vcc)
Brick Detect:
 
Lightning Module
Functional Variant
Power to Accessory
Voltage
Current
Power
 
Power to Apple device
Voltage
Current
Power