3 ms·

Does anybody know how the protocol/mode gets negotiated? Its unbelievable what capabilities such a small port has.

• makomk 10y ago
  Well, that depends on the protocol being negotiated and the connectors and devices on either end, of course. Having just one or two methods of protocol negotiation would be too simple.
  • LeanderK 10y ago
    Well, i would expect that. But how is the detection done? i don't think USB was designed with an alternate mode/thunderbolt in mind. I would expect some tricky solution to play nice with legacy USB-devices, or not?
    • makomk 10y ago
      I think legacy USB 2 has dedicated pins and devices are expected to deal with all of the old legacy signalling methods in addition to the new ones.