The USB cable is used for the connection and communication between the computer and external devices, and can also be used for charging the mobile phone and connecting with the outside. In layman's terms, for transferring data and charging.
USB is the most widely used external bus standard in the PC field, which is used to standardize the connection and communication between computers and external devices, and the USB interface supports plug-and-play and hot-plug functions of devices. With the rapid development of computer hardware, the application of USB increases the speed of data transmission between external devices, and the biggest benefit of the speed improvement for users is that users can use more efficient external devices, such as using USB 2.0 scanners, scanning a 4M picture only takes about 0.1 seconds, and the work efficiency is greatly improved.
USB supports devices according to different interfaces and data cables: mouse, keyboard, printer, scanner, camera, flash drive, MP3 machine, mobile phone, digital camera, mobile hard disk, external optical floppy drive, USB network card, ADSL Modem, Cable Modem and other electronic products.
USB, short for Universal Serial Bus in English, is an external bus standard that regulates the connection and communication between computers and external devices. It is an interface technology applied in the field of PC. The USB interface supports plug-and-play and hot-swap capabilities of the device. USB was jointly proposed by Intel, Compaq, IBM, Microsoft and other companies at the end of 1994.
Interface definition:
Red, white, green, and black are the standard wiring colors, corresponding to pins 1, 2, 3, and 4 respectively;
The four wires are 1-power 2-data3-data4-power
The general arrangement is: red, white, green, and black from left to right
Definition:
Red - USB power supply is marked with the words -VCC, Power, 5V, 5VSB
White - USB cable (negative) - DATA-, USBD-, PD-, USBDT+
Green - USB cable (positive) - DATA+, USBD+, PD+, USBDT+
Black - Ground - GND, Ground
USB is a commonly used PC interface, only 4 wires, two power supplies and two signals, it should be noted that do not reverse the positive and negative poles, otherwise it will burn the USB device or the south bridge chip of the computer!
