PD Alternate Mode: Thunderbolt

Texas Instruments

Published Date: 20 Dec 2017


The Thunderbolt Alternate Mode allows the two sides of a USB Type-C PD connection to discover, negotiate, and enter the Intel Thunderbolt 3 mode allowing transfer of high-speed data. The mode is negotiated using USB Power Delivery messaging, as listed in the USB PD specification. This application report explains the standard implementation of the Thunderbolt Alternate Mode and how it can be used with the Texas Instruments TPS6598x family of USB Type-C and USB PD controllers and associated software tools.