Usb3.0 pin definition usb3.0 pin Definition

Usb3.0 will adopt a new physical layer, in which two channels are used to split the data transmission (transmission) and confirmation (acknowledgement) process, thus achieving a high speed. to replace the current polling and broadcast mechanisms used by USB, the new specification will adopt packet-routing technology, data can be transmitted only when the terminal device has data to be sent.

The new connection standard also enables each component to support multiple data streams, and each data stream can maintain an independent priority (separate priority levels ); this function can be used to terminate jitters during video transmission. the Data Stream Transmission Mechanism also makes native command queue possible, thus optimizing the data transmission on the hard disk.

Mini USB 3.0 interfaces will be divided into two types: A and B public ports (plug), while the mother port (receptacle) will have two types: B and AB. In terms of shape, the AB primary port can be compatible with the public ports A and B. At the same time, we can see that the pins of the public ports 3.0 are 9-pin, while those of 2.0 are 5-pin.
 

 

USB 3.0 mini interface specifications

To be backward compatible with version 2.0, USB 3.0 adopts a 9-pin design. The four pins have the same shape and definition as USB 2.0, and the other five are specially prepared for USB 3.0, this is also considered a combo solution.

Standard USB 3.0 public Port Pin definition, white department is dedicated USB 2.0 connection pin, while red part is dedicated USB 3.0

Pin definition for standard USB 3.0 mother port, purple pin for USB 2.0, red for USB 3.0 connection

USB 3.0 cable cross-section diagram, if not included in the product (braid) line, there are a total of 8, it is worth noting that in the cable, USB 2.0 and 3.0 power cords (power) is shared.

Intel announced that it is working with a number of companies to set a new generation of interface standards that increase the theoretical throughput of USB to 4 Gbps or above. It claims that the transmission rate is 10 times higher than the existing standard. the goal of this USB 3.0 specification is to provide 300 Mbytes/Seconds availability rate at the application layer, and to add new service quality and performance, so that the standard 1394 (also known as FireWire) with another interconnection Interface) competing.