The goal of USB 3.0 technology is to launch products that are 10 times faster than USB 2.0, using the same architecture as wired USB. In addition to optimizing the USB 3.0 specification for lower power consumption and higher protocol efficiency, USB 3.0 ports and cables enable backward compatibility and support for future fiber transmissions.
USB 3.0 uses a new physical layer in which the transmission and the acceptance process are separated by two channels, thus achieving a higher speed. In order to replace the polling and broadcasting mechanisms used by USB, the new specification will use packet-routing technology and only allow the terminal device to transmit data when it is to be transmitted.
The new link standard will also allow each component to support multiple data streams, and each data stream can maintain separate priority levels, which can be used to terminate jitter-causing interference during video transmission. The data stream transmission mechanism also makes the inherent native command queuing possible, thus optimizing the data transmission of the hard disk.
For backward compatibility with version 2.0, USB 3.0 features a 9-pin design with four pins and USB 2.0 in the same shape and definition, and the other five are specifically for USB 3.0.
The standard USB 3.0 male pin definition, the white part is the USB 2.0 connection dedicated pin, and the red part is dedicated to USB 3.0.
The pin definition of the standard USB 3.0 female port, the purple pin is dedicated for USB 2.0, and the red is dedicated for USB 3.0 connection.
If the USB 3.0 cable is not a Braid line, there are a total of eight. It is worth noting that in the cable, USB 2.0 and 3.0 Power are shared.
The Mini USB 3.0 interface is divided into two types, A and B. The Receptacle will have two types, AB and B. From the shape point of view, the AB female port is compatible with the A and B male ports, and the 3.0 version of the male port has 9 pins. .
USB 3.0 uses a new physical layer in which the transmission and the acceptance process are separated by two channels, thus achieving a higher speed.
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