How USB 3.0 Works
Sep 20, 2022
The reason why USB 3.0 has "super speed" performance is entirely due to the improvement of technology.
Compared with the USB 2.0 interface, USB 3.0 adds more physical buses in parallel mode.
You can pick up a USB cable around you and look at the interface section.
On the basis of the original 4-wire structure (power, ground, 2 data), USB 3.0 adds 5 more lines for receiving and transmitting signals.
Therefore, there are a total of 9 lines in the cable or on the interface.
It is the extra 4 (2 pairs) lines that provide the bandwidth required for "SuperSpeed USB" to achieve "SuperSpeed".
Apparently 2 (1 pair) lines on USB 2.0 are not enough.
In addition, the method of signal transmission is still controlled by the host, but it is changed to asynchronous transmission.
USB 3.0 utilizes a bi-directional data transfer mode instead of the half-duplex mode of the USB 2.0 era. Simply put, the data only needs to flow in one direction, which simplifies the time consumption caused by waiting.
In fact, USB 3.0 does not adopt any advanced technology that is rarely heard, but theoretically increases the bandwidth by 10 times. Therefore, it is more friendly and friendly. Once SuperSpeed USB products come out, more people can easily accept them and make better customized products.
