We believe that when you buy mobile phones, the standard will have data lines, which can be used as charging lines, as we all know, so that most of the time we think charging lines are data lines, but in fact they are not. Let's introduce it to you in the next edition.

                                                       



Because the shape of the charging line is basically the same as that of the USB data line. Sometimes we buy a cable at the roadside stall to connect the mobile phone to the computer, but no matter how we operate it, we can't connect the computer. Why?


So the data line and charging line are all connected by USB interface. Generally, there are four wires. But the charging line uses VCC and GND of power supply, while the data line uses VCC, GND and two communication lines.


The function of each wire of USB data line:


Red wire: power supply positive pole (marked as + 5V or VCC)


White Line: Negative Voltage Data Line (identified as Data-or USB Port-)


Green Line: Positive Voltage Data Line (ID: Data + or USB Port +)


Black Line: Grounding (marked GROUND or GND).

Of course, the color of the conductor can only be seen when stripping the data line or the outer rubber of the charging line.


When observing, the USB head is facing itself, with the contacts facing upward, from left to right, the corresponding functions of the contacts connecting wires are grounding wires (or should be called zero wires, black wires), reading data wires (signal outgoing wires, green wires), writing data wires (signal inbound wires, white wires), and + 5V wires (power supply positive poles, red wires).


The data line has four lines in the USB interface, while the power line has only two lines in the USB interface. Therefore, the mobile phone data line can be used as the power line, but the power line can not generally be used as the data line. Because in order to save cost, basically the charging line has omitted two lines in the middle, that is, the read data line and the write data line (green line and white line), which means that there is no data reading and writing ability, only charging. This is why the data line can be charged and the charging line may not be used as the data line.

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