[General] Is USB protocol half duplex or full duplex communication?

[poojarai]

I am little confused whether USB protocol is half duplex or full duplex. After Googling ,get to know
1.x or 2.0 communication is half dulpex and 3.0 is full duplex but not very sure. Please anyone clear my doubt.

 

[krunal_299]

Hi,
USB has deferential protocol for communication.
Basically, for full duplex communication in differential fashion, minimum 1 pair for Tx data line and minimum 1 pair for Rx data lines are must.
While USB has only 1 pair of data lines (D+, D-), so USB would be half duplex protocol.

Thanks