USB pinout on the motherboard: what, where and how

Most modern peripherals are connected via a universal serial bus. Therefore, USB pinout on the motherboard plays a very important role in the operation of a modern computer. There are two ways to install these connectors. The first is installation directly on the board. At the same time, it is displayed on the back side and immediately ready for use. But it is not always convenient for him to connect - and therefore developed another way. Its essence lies in the prepared seat on the main PC board, to which wires from the front panel are connected. And on it there is a connector.

One universal USB 2.0 serial port includes 4 contacts. The first of them is designated "+ 5B". It provides power to the peripheral device. The second and third are contacts, through which information is transmitted. They are designated respectively "DATA-" (minus data transfer) and "DATA +" (plus data transfer). The last, the 4th, which includes the pinout of the USB on the motherboard, is "GND" - the supply of land. In accordance with the standards accepted to date, they are designated by the following colors: power - red, "DATA-" - white, "DATA +" - green, and "GND" - black.

Such interface connections are made in pairs, so on the board on one contact group there are immediately 2 USB connectors. The pin consists of 9 contacts: 4 - one connector, 4 - on the other, and the last two play the role of the so-called key. There is a pin in one place, but in the other there is not. This is done so that it is impossible to confuse them and to properly connect. Similarly, the fitting from the front panel is made. Therefore, when connecting the first to the second must be installed without problems. If this does not happen, then you need to see if you are doing everything right.

Recently, the third version of the USB standard has been gaining popularity. The pinout on the motherboard is significantly different, because much more wires are used to transmit information. There are only 9 of them in addition to the previously mentioned 4. Superspeed + pairs and 2 pairs of the same type are added, but only with a minus, as well as "GND Drain" - additional ground. It is the greater number of wires and allows to increase the data transfer speed. The wires in their colors correspond to blue, purple - minus, yellow, orange - plus, respectively, and one more black - additional ground. As the number of wires increases, the USB pinout on the motherboard increases in direct proportion. For this standard, 19 contacts are already used. One of them is the key, and its purpose is to ensure the correct connection.

With the help of a universal serial bus, a great many different devices are connected to modern computers and laptops. The printer, scanner, multifunction devices, flash drives, keyboard, mouse and other devices that greatly expand the capabilities of the PC - all this connects to the computer by this interface. It's not always convenient to connect to the back of the computer, and the number of integrated connectors may not be enough. It is for solving such a problem that USB pinout is made on the motherboard, which allows to increase the number of ports significantly.