Hot Swap

If you carefully observed the USB interface, in fact, you will find it works is very simple. As we all know, a USB cable composed of four data lines, wherein the data is two, and the other two are power. Wiring Goldfinger four lines are connected to the USB port inside. When to look inside, you'll find two of them outside of the relatively long, it is the data line; and inside two relatively short for the power line, which is the USB works. When we put the USB device is inserted into the machine, it is contacted first signal line, and then the power cord. When pulling out the contrary, since the power supply line is short, it is first cut, then the data line is. This operation has no effect on the entire system and USB device, it can be hot-swappable.