High speed USB 2.0 support is quite rare on cheap chips. Most are still at USB 1... | Hacker News

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bsder on Jan 21, 2016 | parent | context | favorite | on: The Promise and Confusion of USB Type-C

High speed USB 2.0 support is quite rare on cheap chips. Most are still at USB 1.1 speeds.

USB 3 connectors? WAY COOL. I'm running USB 1.1 on the inner pairs and Ethernet on the USB 3 pairs for several projects.

USB 3 standard? Oh, hell, no. The signal integrity requirements are outrageous. And most embedded chips can't even transmit at the 400+Mbps necessary to saturate even USB 2.0.

moreati on Jan 21, 2016 [–]

> I'm running USB 1.1 on the inner pairs and Ethernet on the USB 3 pairs for several projects

That sounds like a nice trick. Could you elaborate, or is there any public information you could link to?

bsder on Jan 21, 2016 | [–]

Nothing proprietary. Just look at a Type C pinout.

http://arstechnica.com/gadgets/2015/01/usb-3-1-and-type-c-th...

Two TX pairs/Two RX pairs. Standard USB 2.0 in the middle.

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