A brief introduction to the USB connector

It is the abbreviation of Universal Serial BUS (Universal Serial Bus), and its Chinese is called “through string”, it is an external bus standard, which is used to regulate the connection and communication between the computer and the external equipment. It is an interface technology used in the field of PC. The USB interface supports plug and play and hot swap functions. USB was jointly put forward by Intel, Compaq, IBM, Microsoft and many other companies at the end of 1994.
With the rapid development of computer hardware and increasing peripheral equipment, keyboard, mouse, modem, printer, scanner have long been known, digital cameras, MP3 Walkman heels, so many devices, how to access personal computers? USB is based on this purpose.
Since the publication of the USB V0.7 version in November 11, 1994, the USB version has experienced many years of development, and now it has developed into a 3 version, becoming the standard extension interface in the current computer. At present, the main board is mainly USB1.1 and USB2.0, and USB versions can be well compatible. USB uses a 4 pin (USB3.0 standard 9 pin) plug as a standard plug, with a chrysanthemum chain that connects all peripherals with up to 127 external devices and does not lose bandwidth. USB needs the support of host hardware, operating system and peripherals in three aspects to work. At present, the main board usually uses the control chip group supporting the USB function, and the main board is also installed with the USB interface socket. Besides the backboard socket, the USB interface on the motherboard is also reserved for the USB pin. It can be connected to the front of the chassis as the front USB interface for convenience of use. The instructions must be connected to the drawing and must not be mistakenly damaged. Moreover, the USB interface can also be connected by a dedicated USB connecting machine line, and can expand more interfaces through Hub. USB has the advantages of fast transmission (USB1.1 is 12Mbps, USB2.0 is 480Mbps, USB3.0 is 5 Gbps). It is convenient to use, support hot plug, flexible connection, independent power supply and so on. It can connect the mouse, keyboard, printer, scanner, camera, flash disk, MP3 machine, mobile [1], digital camera, mobile hard disk and external light drive. , USB network card, ADSL Modem, Cable Modem and so on, almost all external devices.