USB4/TBT3 SB Protocolos suportados

The USB4 / Thunderbolt 3 Sideband Channel is a low-speed serial interface used by the USB4 connection manager to communicate with routers and retimers for link initialization, tunneling configuration, and power management. The sideband channel operates on dedicated sideband pins separate from the high-speed data lanes. It carries configuration space reads/writes, notification messages, and control commands that set up DisplayPort tunneling, PCIe tunneling, and USB 3.x tunneling over the USB4/Thunderbolt link. Engineers debugging USB4 docking stations, Thunderbolt peripherals, and host controllers need sideband decode to verify connection manager operations, tunnel establishment, and link negotiation.