4 ms·
It's a low-speed differential pair that negotiates the initial communication. Once the bus knows it can go to a faster speed, it will switch to a separate recei
by jotux 8y ago
It's a low-speed differential pair that negotiates the initial communication. Once the bus knows it can go to a faster speed, it will switch to a separate receive differential pair and transmit differential pair.
-Power
-Ground
-Signal Ground
-USB2 data+
-USB2 data-
-USB3 RX+
-USB3 RX-
-USB3 TX+
-USB3 TX-
So it's a slow serial bus that negotiates traffic onto a faster serial bus.
https://en.wikipedia.org/wiki/USB_3.0#Pinouts https://en.wikipedia.org/wiki/USB_3.0#Pinouts
- cesarb 8y ago> It's a low-speed differential pair that negotiates the initial communication. AFAIK, it's not, the SuperSpeed (USB3) wires have their own independent negotiation; the device switches to the USB2 wires only when USB3 is not detected. This also explains how the proposed VirtualLink alternate mode can have USB3 without the USB2 pair.