3 ms·
Does USB4 tunnel original USB (1.0-2.0), or is that still on its own separate pins? I was under the impression that electrical and timing requirements meant it
by jml7c5 4y ago
Does USB4 tunnel original USB (1.0-2.0), or is that still on its own separate pins? I was under the impression that electrical and timing requirements meant it was virtually impossible to tunnel it while remaining in spec.
- namibj 4y agoWorse: at least thunderbolt provided USB downstream ports by including a PCIe-backed USB root controller. On USB4, all USB 2.0 downstream devices have to share the limited USB 2.0 bandwidth at the upstream port. They could have just specified a translator like they did for USB 1.1 -> USB 2.0, but they didn't and it's not possible to make one that works reliably/portably.