How many cores does the USB connection cable use?

USB is a commonly used PC interface. It has only 4 wires, two for power and two for signals. Therefore, the signals are transmitted serially. The USB interface is also called Serial port, usb2.0 speed can reach 480Mbps.

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## USB interface output voltage and current are: 5V, 500mA.

There is actually an error, the maximum cannot exceed /-0.2V, which is 4.8--5.2V. The four wires of the USB interface are generally allocated as follows. It should be noted that the positive and negative poles must not be reversed, otherwise the USB device or the south bridge chip of the computer will be burned: black wire: gnd; red wire: vcc; Green line: data; white line: data-.

USB interface colors

The general arrangement is: red, white, green and black from left to right.

Definition:

Red - USB power supply: marked with -VCC, Power, 5V, 5VSB.

White-USB data cable: (negative)-DATA-, USBD-, PD-, USBDT-.

Green-USB data cable: (positive)-DATA, USBD, PD, USBDT.

Black - Ground wire: GND, Ground.

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