Due to recent inquiries from our company regarding the definition and graphic explanations of USB interface pins, Shenzhen Guangjiayuan Electronics has compiled and uploaded USB pin information for customers' reference. The details are as follows:

一、USB interface definition: 

As is well known, the metal contacts of the USB interface consist of four metal wires, two power cables, and two data signal cables, so signals are transmitted in series. Therefore, also known as a serial port, standard

The USB2.0 interface has a data transmission speed of up to 480Mbps. It can well meet the needs of industry and civilian use.

The output voltage and current of the USB interface are:+5V 500mA. In practical use, there is an error of plus or minus 0.2V, which is 4.8-5.2V. The four wires of the USB interface are generally red, white, and green

The black is assigned from left to right, and the specific pin definitions are as follows. It is recommended not to invert the positive and negative poles, otherwise it may damage the USB device or computer South Bridge chip, thereby

Affecting the normal use of the device.

二、USB pin definition:

Pin      name              illustrate                                   Wiring color 
1         VCC +            5V voltage                                        red

2           D-            Negative pole of data cable                 white 
3           D+            Positive pole of data cable                  green 
4          GND              grounding                                        black 
三、MiniUSB interface definition: 
The general arrangement is: red, white, green, black, from left to right

Definition:

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

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

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

Black - Ground wire: GND, Ground

四、MiniUSB pin definition: 
Pin     name                  illustrate                                      Wiring color 
1          VCC +              5V voltage                                        red

2           D-              Negative pole of data cable                 white 

3           D+             Positive pole of data cable                   green 
4           ID         permits distinction of 
Micro-A- and Micro-B-Plug       none
Type A:connected to Ground 
Type B:not connected 
5           GND              grounding                                          black

Pin Definition (Drawing):

The ID pin is usually empty and only used in OTG functions. Due to the Mini-USB interface being divided into Mini-A, B, and AB interfaces. If your system is only used as a slave, then

Then use the B interface. The system controller will determine the level of the ID pin to determine what type of device is inserted. If it is a high level, it is the B connector inserted, and the system will take control at this time

Master mode; If the ID is low, it is the A interface insertion, and the system will use the HNP conversation protocol to decide which one to use as the Master and which one to use as the Slave.

Our phones/mobile power supplies and other devices generally use B-type MiniUSB ports/micro USB interfaces. Currently, the most common ones on the market are also USB B-type interfaces, Mini

USB B-port and Micro USB B-port.

The above information is provided by Guangjiayuan Electronics for reference only!