Re:Why do USB-C hubs still have USB 2.0 ports? (2021)
by jml7c5 on Tuesday May 10, 2022 @10:59PM
(#31335385)
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.
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Re:Why do USB-C hubs still have USB 2.0 ports? (2021)
by namibj on Wednesday May 11, 2022 @01:25AM
(#31336122)
Worse: 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.