Release 1.4 - 5 - USB Type-C Cable and
March 29, 2019 Connector Specification
Copyright © 2019 USB 3.0 Promoter Group. All rights reserved.
4.4.3 VCONN ............................................................................................................ 130
4.5 Configuration Channel (CC) ................................................................................... 134
4.5.1 Architectural Overview ........................................................................... 134
4.5.2 CC Functional and Behavioral Requirements .................................... 148
4.5.3 USB Port Interoperability Behavior ..................................................... 186
4.6 Power .......................................................................................................................... 205
4.6.1 Power Requirements during USB Suspend ........................................ 206
4.6.2 VBUS Power Provided Over a USB Type-C Cable ............................... 207
4.7 USB Hubs .................................................................................................................... 213
4.8 Power Sourcing and Charging ............................................................................... 213
4.8.1 DFP as a Power Source ............................................................................ 213
4.8.2 Non-USB Charging Methods ................................................................... 216
4.8.3 Sinking Host ............................................................................................... 216
4.8.4 Sourcing Device ......................................................................................... 216
4.8.5 Charging a System with a Dead Battery .............................................. 216
4.8.6 USB Type-C Multi-Port Chargers ........................................................... 217
4.9 Electronically Marked Cables ............................................................................... 220
4.9.1 Parameter Values ...................................................................................... 221
4.9.2 Active Cables .............................................................................................. 221
4.10 VCONN-Powered Accessories (VPAs) and VCONN-Powered USB Devices
(VPDs) ......................................................................................................................... 221
4.10.1 VCONN-Powered Accessories (VPAs) .................................................... 222
4.10.2 VCONN-Powered USB Devices (VPDs) ................................................... 222
4.11 Parameter Values ..................................................................................................... 224
4.11.1 Termination Parameters ......................................................................... 224
4.11.2 Timing Parameters ................................................................................... 226
4.11.3 Voltage Parameters .................................................................................. 229
5 Functional Extensions ........................................................................................................ 231
5.1 Alternate Modes ....................................................................................................... 231
5.1.1 Alternate Mode Architecture ................................................................. 231
5.1.2 Alternate Mode Requirements ............................................................... 231
5.1.3 Parameter Values ...................................................................................... 235
5.1.4 Example Alternate Mode – USB DisplayPort™ Dock ........................ 236
6 Active Cables ......................................................................................................................... 240
6.1 USB Type-C State Machine ..................................................................................... 241
6.2 USB PD Requirements ............................................................................................. 242
6.2.1 Active Cable USB PD Requirements ..................................................... 243
6.2.2 USB PD Messages for OIAC ..................................................................... 243
6.2.3 Short Active Cable Behaviors in Response to Power Delivery
Events ........................................................................................................... 255
6.3 OIAC Connection Flow and State Diagrams ....................................................... 255
6.3.1 OIAC Connection Flow – Discovery – Phase 1 ................................... 256
6.3.2 OIAC Connection Flow – Reboot – Phase 2 ......................................... 257
6.3.3 OIAC Connection Flow – Configuration – Phase 3 ............................ 258
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