USB Type-C ENGINEERING CHANGE NOTICE
USB Implementers Forum Form 20140811-ECN Page: 1
Title: Thunderbolt 3 Compatibility Updates
Applied to: USB Type-C Specification Release 2.0, August
2019
Brief description of the functional changes proposed:
1) Clarification for TBT3 Device Without Predefined Upstream Port at the end, to go through
ErrorRecovery on downstream port on connect/disconnect
2) Clarification with Legacy TBT2 and TBT3 working
Benefits as a result of the proposed changes:
1) ErrorRecovery define by the spec rather the written of “Perform a disconnect/reconnect on the port”
2) Enable properly work with TBT2 device using mDP to USB Type-C convertors
An assessment of the impact to the existing revision and systems that currently
conform to the USB specification:
No existing system or devices
An analysis of the hardware implications:
An analysis of the software implications:
Require update the correct bits to work with TBT2,
Require redefine the bits used for sign TBT active/passive
An analysis of the compliance testing implications: