USB data line consists of four lines, namely red / white / black / green four, two lines are two lines of data lines are power lines. Now I have to ask is the power line part of which is composed of two colors of the line? More
USB interface consists of four transmission lines, of which the outside of the two relatively long, that is, data lines; and inside the two relatively short for the power cord. When the USB device into the machine's USB interface, the first contact with the signal data cable, and then is the power cord. And when the pull is just the opposite, because the power cord is short, so the first cut off, and then is the data line. In this way, the entire system and USB devices have no effect, so to achieve a hot swap, which is the USB device works. USB, is the English UniversalSerialBus (Universal Serial Bus) acronym, and its Chinese referred to as "through the line", is an external bus standard, used to regulate the computer and external equipment connection and communication. Is applied in the PC field interface technology. The USB interface supports plug-and-play and hot-swapping of devices. USB at the end of 1994 by Intel, Compaq, IBM, Microsoft and other companies jointly proposed.
Red and black is the power cord white green is the data line red is the power supply black is grounded
Red line: Power supply positive white line: Negative voltage data line Green line: Positive voltage data line Black line: Ground Black line for ground (ground), red line for the power supply positive (+ 5Volt or VCC), white line for the data negative line (USBPort - or Data-), the green line is the data positive (USBPort + or Data +).
