text/Xiaoyiping Technology
Here we need to insert a short story first. In 2021, the Xiaomi 11U model, known as the Light of Android, was officially released. This machine is also one of the most expensive mainstream flagship products in Xiaomi in history, representing the highest level of the Xiaomi brand.
However, it is such a real high-end flagship product. uses the standard USB 2.0 on the USB 7 standard, and does not use the latest UFS3.1 or USB 3.0 (other names include USB3.1 Gen 1). Correspondingly, Huawei , Samsung , OPPO and other mid-to-high-end product lines are equipped with interfaces that support USB 3.0 standard. So far, no model of Xiaomi supports USB 3.0 , including the latest Xiaomi 12, and in addition, the full range of iPhones does not support USB 3.0 . In addition, the entire iPhone series does not support USB. 3.0 standard.
The following figure is all mobile phone models that support USB3.0 standard as of mid-2021 (mobile phones that support screen projection support USB3.0 standard).
Speaking of this, let’s first talk about what USB is. USB is actually an interface standard . Its purpose is to transmit data and link external devices. The USB disk, wired mouse, wireless mouse , expansion dock, etc. that we often use in daily life are connected based on the USB interface standard.
However, it should be noted here that USB is just a standard rather than a general interface form. Most of the common interfaces in our lives support USB interface standards, such as Type C, USB, MINI USB, Micro USB, etc., support USB interface standards, but here we also want to remind everyone that the standards they support may be completely different when they seem to look the same interface. Just like the examples of Xiaomi 11U and Samsung S21 mentioned above, they are both Type C interfaces, but the standards they support are completely different.
Next, let’s focus on the difference between USB 2.0 and USB 3.0 and USB 3.1. The most intuitive change brought about by the evolution of
standard is the increase in transmission rate. As shown in the figure below, this is the current rate chart of the latest USB standard:
Among them, the maximum speed that the USB2.0 standard can reach is 480Mbps, which is converted into 60MB/s. Simply put, if you use a device that supports USB2.0 standard to copy or paste, can only reach a maximum speed of 60MB/s .
In contrast, the theoretical peak speed of USB 3.2 Gen 1 (that is, USB 3.0 in the general sense) can reach 5Gbps, which is converted to 625MB/s transmission speed, while the theoretical peak speed of USB 3.2 Gen 2 (that is, USB 3.1 in the general sense) can reach 10Gbps, which is converted to 1250MB/s transmission speed. The higher the transmission speed of
, the most intuitive change that can be brought about is the increase in the transmission speed. When the receiver and input interfaces are peer-to-peer, the speed of copying large files using this interface will be significantly improved. In addition, in some aspects such as wired screen projection, the updated USB standard will also have higher transmission speeds.
Here we need to focus on USB3.1 and USB 3.0.
Once, the USB Alliance released the brand new USB 3.0 standard, which is the official iterative version of USB 2.0. The difference can be clearly seen from the name. Subsequently, the USB Alliance released the USB 3.1 standard. Although the naming rules have changed, they are still understandable in general.
However, not long after, the USB Alliance for some reason changed the standard named USB 3.0 to USB 3.1 GEN 1, and changed the original USB 3.1 to USB 3.1 GEN 2. Subsequently, the USB Alliance changed its name again, changing USB 3.1 GEN 1 to USB 3.2 GEN 1, and changing USB 3.1 GEN 2 to USB 3.2 GEN 2.
Are you already confused when you see this? I was almost killed when I saw this string of names, but in general, it is:
USB3.0 is equal to USB 3.2 GEN 1, equal to USB 3.1 GEN 1
USB 3.1 is equal to USB 3.2 GEN 2, equal to USB 3.1 GEN 2
, so don't think that it uses the USB 3.2 standard, and you also need to look at the suffix after it, as shown in the figure below. This is the interface description of a certain laptop. USB interface is all USB 3.2 GEN 1, which is actually the former USB 3.0, and even USB 3.1 is not.
is the same on the mobile phone market at present. Almost all mobile phones are equipped with USB 3.0 or USB 2.0 interfaces.
END Hope it can help you
