Reversibility for USB 2.0 data signals is mechanical: There are data pins on both sides and only one set of pins get connected. The socket side connects both se

Reversibility for USB 2.0 data signals is mechanical: There are data pins on both sides and only one set of pins get connected. The socket side connects both sets. There is only one more wire in a USB-C 2.0 cable: it is used to signal orientation and if an end is a power source, sink or a headphone adaptor. USB-3 signals are more complicated though. There can be up to two bidirectional high-speed channels. The aforementioned sensing pin is used to figure out if those channels need to be swapped or not.