The USB connection cable is four-core.
Universal Serial Bus (Universal Serial Bus), referred to as USB, is a widely used interface specification on computers.The USB interface is a four-pin interface on the computer motherboard, with the middle Two pins transmit data, and two pins on both sides provide power to peripherals.
USB cables are also divided into shielded and unshielded. The transmission speed of shielded cables can reach 12Mbps, which is more expensive. The speed of unshielded cables is 1.5Mbps, but the price is cheap. USB can transmit up to 12Mbps in series. Connect 127 devices in series; support plug-and-play and hot-swap.
The USB interface is fast, easy to connect, does not require an external power supply, and has good compatibility with external devices. It can connect up to 127 peripherals. USB has two specifications, USB1.1 and USB2.0. The USB interface can connect speakers, modems, digital cameras, monitors, joysticks, scanners, mice, keyboards and other peripheral devices, making these peripherals hot-swappable, that is, plugging and unplugging USB devices without shutting down.
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