Usb-C™ Pd Architecture; Architecture Overview; Figure 1. Usb Power Delivery Architecture - ST STM32 User Manual

UM2063
2 USB-C™ PD architecture
2.1

Architecture overview

The USB Power Delivery specification document defines the communicating layers of a PD
device (either provider or consumer) as shown in
Provider
A PD3.0-capable device is assumed to be made up of at least one port, which can
• sink power (a consumer), source power (a provider), or toggle between the two roles
(dual role power)
•
optionally communicate via USB
•
communicate using SOP Packets
•
optionally communicate using SOP Prime packets.
Where USB products support USB Power Delivery protocols a USB DFP is initially a Source
and a USB UFP is initially a Sink, although USB-PD enables the Source/Sink and the
DFP/UFP roles to be swapped.
Note: There is only one Source port and one Sink port in each PD communication between port
partners.

Figure 1. USB Power Delivery architecture

Device policy manager
Policy engine
Protocol
Physical layer
Figure
CC-lines
UM2063 Rev 5
USB-C™ PD architecture
1.
Consumer
Device policy manager
Policy engine
Protocol
Physical layer
MS41457V2
7/18
17