In daily life, the application of USB interface in daily life is still very extensive. Its USB interface is a kind of PC external interface, which has become a common interface standard in the PC industry. However, with the continuous development and progress of the times, now there are more updated versions of USB cables, such as version 2.0 and version 3.0 that are commonly used now. So what is the difference between USB 3.0 cable and USB 2.0 cable?
Differences between USB 3.0 cable and USB 2.0 cable:
1. Backward compatible
The USB 3.0 interface, like previous upgrades, is backward compatible with its physical characteristics. That is, USB2.0 devices, interfaces and wires can support the USB3.0 standard to achieve superspeed. The compatibility of USB3.0 is mainly reflected in the design of the interface. USB2.0 is divided into 4 wires, two pairs of wires for data input and output, and two pairs for power supply circuit and ground wire. The USB3.0 version adds 5 electric shock designs to the USB2.0 interface, and the new electric shock is placed side by side behind 4 USB2.0 contacts. Users can distinguish the differences between USB3.0 and USB2.0 from the USB interface structure.
2. The speed is effectively improved
USB3.0 has a high transfer rate of 4.8Gbps, which is ten times higher than USB2.0. Theoretically, USB3.0 can transfer 27GB of HD video within 70S, while switching to USB2.0 takes more than 15 minutes to complete. However, to achieve this efficiency, USB3.0 also needs to be paired with a storage device that can support USB 3.0 speeds. In addition, Windows systems also need to install a new Mass Storage Device driver that supports the USB 3.0 standard.
3. Two-way transmission
USB2.0 input and output terminals do not support simultaneous operation, but among the five new lines added to USB3.0, two provide data output, two provide data input, and four lines can achieve two-way transportation at the same time. The two-way transfer function can greatly improve applications such as synchronizing information or data backup.
4. High power supply capacity
The excellent comprehensive performance of USB3.0 is not only reflected in higher speed, but also in terms of power supply capacity. At present, there are many electronic products on the market that need to be charged through the USB interface, due to the huge market demand and the increase of high-power electronic products, developers have also improved the power supply capacity of USB3.0, from 100mA to 900mA. This means that USB technology will be used in more electronic products.
5. High efficiency
USB 3.0 technology introduces a higher power supply protocol standard, and also abandons the device polling mode and changes it to an interrupt mode. Simply put, when the USB connected in USB2.0 mode is inactive or in standby, the USB bus controller still needs to periodically check the data status of the device transmission. After USB3.0 mode, the device can completely cut off the connection to the USB in standby, and if the connection is to be restored, an interrupt signal will be automatically sent to the controller, and the controller will start performing data transfer tasks.
The above introduction is the difference between USB 3.0 cable and USB 2.0 cable. The 3.0 version of the USB cable is obviously more advantageous than the 2.0 version, but in order to ensure the suitability of use, everyone still needs to choose according to their own actual situation when choosing.
