Introduction to USB Power Delivery Over the USB Type-C? Cable
Andrew Rogers & Josh Averyt
The USB Power Delivery revision 2.0 specification details how the Power Delivery (PD) protocol truly ?unlocks? the
advanced features of the USB Type-C? cable. Power Delivery protocol allows port-to-port communication that provides
mechanisms for: negotiating power roles, negotiating power sourcing and consumption levels, performing active cable
identification, exchanging vendor specific sideband messaging, and performing Alternate Mode negotiation allowing 3rd
party communication protocols to be routed onto the USB Type-C cable?s reconfigurable pins.