The TUSB1104 configured for USB 3.2 x2 mode will determine if the link is operating in USB 3.2 x2 or in USB 3.1 x1. If the link is USB 3.2 x2, then TUSB1104 will operate with one port operating as a USB 3.2 x1 port and the remaining port following the lead of the other port. The port functioning as a USB 3.1 x1 port is called the config lane. The determination of the config lane is based solely on the Type-C orientation. For normal orientation (FLIP = L), Port 1 is the config lane. For the flipped orientation (FLIP = H), Port 2 is the config lane.

In USB 3.2 x2 the config lane will operate as a standard USB 3.2 x1 port. While in all USB low power states (Disconnect, U1, U2, and U3), the non-config lane will be disabled in order to conserve power. Entry to and exit from these low power states is determined solely by the config lane. If the config lane detects an exit from a low power state, then the non-config will be enabled.