Micro USB 5p male short body plug board H=5.9 vertical plug, The normal pin definition is "top 1 red/3 green/5 black, bottom 2 white/4 empty". Pin1: VBUS, the color of the wire is Red (red), and the positive pole of the power supply is 5V. The VBUS wire is the power supply wire that HOST/HUB supplies to USB devices, which is usually 5V for ordinary USB devices. It is usually connected to 5VSB or 5VCC of ATX power supply. Pin2: D -, the color of the wire is White (white), and the data wire is negative. Pin3: D+, the color of the wire is Green (green) The data cable is positive. The USB signal is a differential signal, and the signal lines are D+, D -. Connect a 15kohm pull-down resistor at the USB host end, D+, and D - respectively. On the USB device side, there is a difference between high-speed and low-speed devices: high-speed devices, D+is connected to a 1.5kohm Pull-up resistor, and D - is not connected; Low speed devices are the opposite. Pin4: ID, the color of the line is none.

There are two types of interfaces, A and B, where A is connected to the ground wire and used to connect the USB shell for shielding; B is not connected to the ground wire. Pin5: GND, the color of the wire is Black, and the signal ground wire. GND is the abbreviation for the grounding terminal of a wire. Represents a ground wire or 0 wire. This place is not truly a ground, it is assumed for application purposes. For a power source, it is the negative pole of a power source.

USB uses four wire cables, two serial channels for data transmission, and the other two provide power for downstream devices. For any successfully connected and mutually recognized peripheral devices, data will be transmitted at the highest speed that both devices can support.

The USB bus will automatically switch from high-speed to low-speed dynamically in the compatible transmission mode based on the peripheral situation, and match and lock at the appropriate rate. USB is a token based bus. Similar to Token Ring network or FDDI token based bus. The USB host controller broadcasts the token. The device on the bus detects whether the address in the token matches itself, and responds by receiving or sending data to the host. USB manages USB bus power by supporting suspension/recovery operations. Host, Hub, and functional devices. The VBUS cable is the power cable that HOST/HUB supplies power to USB devices, that is, the+5V of ordinary USB devices. Generally, it is connected to the 5VSB or 5VCC of ATX power supply and is on the USB device side. At this time, there is a difference between high-speed and low-speed devices: high-speed devices, D+is connected to a 1.5kohm Pull-up resistor, and D - is not connected; Low speed devices are the opposite. There are two types of interfaces: A and B, where A is connected to the ground wire and used to connect the USB shell for shielding; B is not connected to the ground wire. Pin5: GND, the color of the wire is Black, and the signal ground wire. GND is the abbreviation for the grounding terminal of a wire. Represents a ground wire or 0 wire. This place is not truly a ground, it is assumed for application purposes. For a power source, it is the negative pole of a power source.

Micro USB connectors are smaller than standard USB and Mini USB connectors, save space, have a plug and unplug life and strength of up to 10000 times, and have a blind plug structure design. The Micro USB standard supports the current OTG function of USB, which allows for direct data transfer between portable devices without a host (such as a personal computer). It is compatible with USB 1.1 (low speed: 1.5Mb/s, full speed: 12Mb/s) and USB 2.0 (high speed: 60Mb/s), while providing data transfer and charging, making it particularly suitable for high-speed (HS) or higher data transfer rates, It is the best choice for connecting small devices such as mobile phones, PDAs, digital cameras, digital camcorders, and portable digital players.

At the same time, it can also provide convenience for the car, only requiring a USB car charger and a MICRO USB data cable for emergency phone charging. And in high-end cars, there is a 5V output interface directly connected to a MICRO USB cable to charge the phone. MICRO USB is versatile and easy to use.