This BOSS wants technical articles, but the title of this news is easy to attract everyone's attention. For the sake of reading, Little Lion also tried to change the taste, but the content is definitely full of practical information!
The biggest change of USB 3.1
USB interface is probably one of the most common interfaces in the world, and most of us have witnessed the transformation from the USB 2.0 specification to the current USB 3.2 specification. Since USB 3.0 was fine-tuned after the release of USB 3.1, USB 3.0 has a new name, USB 3.1 Gen1. The real USB3.1 is called USB 3.1 Gen2. USB 3.1 is only "0.1" in numbers compared to 3.0, but its changes can be said to be a revision. Compared with USB 3.0, USB 3.1 has doubled its transmission speed by modifying the transmission protocol and other means, reaching 10Gbps under the premise that the hardware remains unchanged. The USB-C interface was also introduced with the USB 3.1 specification. There are three interface standards for
USB 3.1, namely USB Type A, USB Type B (Micro USB) and the latest USB Type-Ch. The specification of
Type-C is formulated in accordance with the USB 3.1 standard, so USB 3.1 can be made into Type-C, Type-A and other types, but Type-C is not equal to USB3.1, and there is no absolute relationship between USB 3.1 and USB Type-C. The biggest feature of the double-sided pluggable interface of
Type-C is that it supports double-sided insertion of USB interface, which officially solves the global problem of "USB can never be plugged in accurately", and plug in the front and back sides at will. At the same time, the USB data cable used with it must also be thinner and lighter.
For the general public, the changes in appearance and usage of Type-C are obviously the most intuitive. As for charging, Little Lion plans to put it later. But the problem is, consumers , , the Type-C interface that has been popular with , feels that it has not become popular in recent years?
popularizes slow Type-C: high cost
BOSS Do you think of this paragraph that you want to kill me - the cost is high!
Obviously, as a technology media editor, Little Lion will not use the above three words to deal with the boss and everyone's pull. The cost is high, but where is the cost high?
NPR interviewed Ajay Bart, one of the inventors of USB. Troubled that every time you connect a device, you need to find the one you need in piles of wires and wrap them together, and at the same time you need to find the corresponding interface. Ajay Bart led the Intel team to develop a USB interface 24 years ago. Through this interface, users can connect to various devices such as mouse, iPod, printer, etc., and the interface used by each device is the same. This not only brings great convenience to players, but also provides convenience for manufacturers to design products.
Bart said that the biggest problem with this interface is that it is irreversible, that is, it cannot be plugged in the opposite direction, but despite this, he still insists on this design. Because according to functional requirements, designing to be plugged in both front and back (that is, blind insertion) means double the wire, which will not only cause trouble for the product design, but also double the cost. As a new product, Bart believes that an important factor that can make USB interfaces popular quickly is that they are cheap.
Although Bart is also very dissatisfied with the design that cannot be plugged in the reverse, he said that compared with the previous one, the USB interface not only does not need to distinguish a large number of cables, but also has a 50% chance of successful connection at one time, so the USB interface is already very convenient.
In fact, the cost of wires reaches the Type-C stage and the impact will not be great. The problem is that even if the PC has a Type-C interface, what about the terminal device?
In September 2018, vivo released the latest offline flagship vivo X23, priced from 3,498 yuan. What makes people feel relieved is that vivo still does not forget its original intention. Micro USB is back again, and the Type C charging interface is impossible. This made netizens feel that the popularization of Type C charging interface has not been successful yet and efforts are needed.
Huami OV Honor, as the main force in my country's mobile phone shipment, is the mobile phone chosen by most consumers, so how much Type C mobile phone can be mainly determined by them! vivo X23 is a bit of a joke with everyone. In fact, domestic mobile phones with 0html of more than 200 html are basically Type C interfaces, and more than 90% of mobile phones with 0 html are also Type C interfaces.
The problem is that at the stage of 1,000 yuan to 1,999 yuan, OV cough, it’s a bit not very powerful, Redmi supports the popularization of Type C.
is actually not just a mobile phone. If you want to really fully popularize the Type C interface, U disk and mobile hard disk also need to be updated. However, in this way, for an interface, many friends' terminal mobile storage devices need to be changed. With this calculation, it seems that it is not cost-effective
charging conspiracy theory
solid-state hard disk With the development of particle and master control technology, its speed has long exceeded the upper limit of SATA3 interface. Some high-end products have used the M.2 interface NVME protocol, and the speed exceeds 2000MB per second is 10 times that of mechanical hard disks! The characteristics of and are not afraid of shock can be said to be very suitable for mobile office use. Moreover, the speed of solid-state mobile hard drives has exceeded 500MB per second, and USB 3.0 is overwhelmed, so the 3.1 Gen 2 naturally becomes the best partner for ultra-high-speed devices.
Of course, for most consumers, USB3.1 Gen 2 devices are still too far away. Take solid-state mobile hard drives for example. 256GB costs more than 600 yuan, 500G costs more than 1,000 yuan, and 1TB of big brands starts at 1,599 yuan.
To talk about the current disadvantage of USB3.0, it is not that the speed is insufficient, but that the power supply capacity is too weak and the interface is not enough. In the past few years, many laptops would be equipped with 5 USB interfaces, but in recent years, with the rise of 3.0 interfaces, there have been fewer and fewer interfaces. In addition, the USB3.0 interface with nominal current of 0.9A is often measured to be only 0.5A, so the slow charging is not enough.
In fact, in addition to the fast data transmission speed, charging is also a highlight of the Type C interface. Type-C is also more powerful than Micro-USB in terms of function. When used for charging, Type-C supports up to 100W charging power, and the charging speed can be greatly improved by and . At the same time, Type-C also supports two-way charging, which not only can use Type-C's data cable to charge your phone, but also can charge other phones through the data cable.
In the future, you can charge your mobile phone, tablet, laptop, and even electric cars with just one cable or a charger. However, it is the major mobile phone manufacturers that prevent good things from happening. Nowadays, each mobile phone fast charging has its own standards, Qualcomm MediaTek Huawei OV. The fragmentation of the
charging standard is the most deadly. If the data transmission is not unified, the worst is that the transmission speed is slower. However, inconsistent power transmission may lead to damage to the machine or even accidents.
Thunderbolt 3 interface pressure
Thunderbolt 3 (Thunderbolt 3) and USB 3.1 are both data transmission protocols. The main difference between different transmission standards is the transmission rate. Take USB 3.1 as an example, it is also divided into USB 3.1 Gen1 and USB 3.1 Gen2. The maximum transmission rate of USB 3.1 Gen1 is 5Gb/s, and the maximum transmission rate of USB 3.1 Gen2 is 10Gb/s.
and one of the reasons why users are prone to confuse Thunderbolt 3 and USB Type-C is that both cables use Type-C interface specifications, which look almost exactly the same. Now in order to better distinguish the two, Apple's latest Thunderbolt 3 data cable will have the Thunderbolt logo on it.
Type C belongs to the interface specification, and Thunder 3 belongs to the physical layer using Type C interface, which is a specification standard and does not conflict with Type C. If you want to compare it, it should be compared with the USB 3.1/3.2 interface, because Thunder 3 can reach 40Gbps during the development process of Intel, the bandwidth can reach 40Gbps, which is as high as 4 times the 10Gbps gap compared to USB 3.1.
It should be noted that Intel announced that it will exempt the technical licensing fee for the Thunderbolt 3 interface from 2018, and will also have a built-in Thunderbolt 3 controller in the next generation of Core processors, which means that the cost of manufacturers using the Thunderbolt 3 interface in new computers will be the same as that of ordinary USB Type-C. The Thunderbolt 3 interface will usher in great popularity in the next few years.
In other words, when USB's own camp is still quarrel, the lightning interface has already been killed. In the past, it was enough to slowly become popular. Now, with the strong support of Intel, Thunder 3 has also given consumers more choices in the terminal market. It is probably even more difficult for Type C to become the absolute occupant of the market...
Little Lion's favorite chicken leg Dividing line
