USB3.0 and USB2.0 difference introduction

With the continuous collection of hardware level and software level, USB2.0, which we used to use, has also been upgraded to 3.0, then between USB3.0 and USB2.0 What is the difference?

When we use the mobile hard disk, we will find that the speed of the mobile hard disk is much faster than the USB flash drive, but the speed of the mobile hard disk is not the speed of the hard disk, and it is much slower than the hard disk. However, if you try to use a USB 3.0 mobile hard disk, you will find that the speed of the hard disk is the same as that of the direct connection to the motherboard. It can reach the upper limit of the mechanical hard disk and is no longer limited by the bottleneck of the interface.

For more questions about mobile USB devices, the following questions may help you find alternative solutions or help you solve problems you will encounter in the future. Related knowledge.

USB 3.0 delivers up to 10x USB 2.0 speeds of 480 Mbps for USB 2.0 and 4.8 Gbps for USB 3.0. Of course, many devices do not need such a high rate, but the speed requirements of devices such as hard disks and card readers are still very high. Compared to USB 2.0, USB 3.0 will be more energy efficient. In addition, USB 3.0 is backward compatible and supports USB 2.0 devices.

USB 3.0 is a product that is compatible with older versions, supports universal I/O interfaces, and is optimized to reduce power consumption while improving protocol efficiency in computers, consumer products, and mobile products. Synchronous mobility, capable of supporting both optical and digital component specifications, with the ease of use and plug-and-play features of traditional USB technology.

Mini USB 3.0 has interfaces that are divided into A and B (Plug), while the Receptacle will have B and AB. From the shape point of view, the AB port is compatible with A. And B male mouth, at the same time you can see that the 3.0 version of the male mouth is 9 stitches, while the 2.0 is 5 stitches.

In order to be backward compatible with version 2.0, USB 3.0 uses a 9-pin design, four of which are identical in shape and definition to USB 2.0, while the other five are many USB3s specifically for USB 3.0. .0 relatively strangers are worried about not knowing how to identify and distinguish between USB2.0 interface and USB3.0 interface, then let's compare the difference between the two:

USB 3.0/2.0 interface comparison < Br>

In fact, the interface analysis in the front has been said very clearly, USB 3.0 standard A-type interface can be backward compatible with USB 2.0/1.1, its size is the same, but the two interfaces are very well differentiated :

Observing the color method, in order to distinguish it from USB 2.0, the USB 3.0 Primoter Group recommends that the blue base be used in the USB 3.0 interface, so we can distinguish it by color;

Observe the contact method, which is more cautious. USB 2.0 only has 4pin metal contacts, while USB 3.0 is 9pin contacts. The front 4pin and USB 2.0 are one-to-one, and the rear 5pin is USB 3.0 exclusive.

As for the USB 3.0 B-type interface, it is better to distinguish. The USB 3.0 standard B-type interface is larger than the USB 2.0, and the upper part is more prominent, and it accommodates the new 5-pin contact.

Just take the extracurricular knowledge, read this article is not a great benefit, have not used 3.0 can try to use.