USB3.0 and USB2.0 are more common in our daily life. The difference between the two is:
1. The color of the middle plastic sheet at the interface is different;
2. The number of physical buses is different;
3. The transmission rate is different;
4. Different power consumption;
5. Different working modes.
In order to distinguish USB3.0 and USB2.0, the standard specification stipulates the color of the interface. The color of the middle plastic sheet at the USB interface is different. The color of USB3.0 is blue. The color of USB2.0 is black.
Number of physical buses
Due to the different working modes, the physical buses of the two types of USB ports are different. USB2.0 has 4 wires, 2 power wires and 2 signal wires. USB3.0 has 5 wires, 2 sending data wires, 2 receiving data wires, and a ground wire.
The transmission rate is different
The transfer rate of USB3.0 is about 320MB/S, and the theoretical upper limit is 640MB/S. The transfer rate of USB2.0 is 30MB/S, and the theoretical upper limit is 60MB/S.
The power consumption is different
The power supply capacity of USB3.0 is 1A, which is 5W power consumption, while the power supply capacity of USB2.0 is 0.5A, and the power is 2.5W. Therefore, users who need to use the USB port to charge their mobile phones, it is best to choose the blue USB3.0 because of its higher output power!
The working mode is different
Since USB3.0 can realize two-way transmission of data, its working mode is full-duplex mode. USB2.0 is half-duplex mode.
There is still a big difference between USB3.0 and USB2.0. When purchasing related interfaces, you must choose the product that suits you.