What does Type-C interface mean?

Type-C is a USB interface form and a hardware interface specification for Universal Serial Bus (USB); it is a USB standardization organization that solves the long-term problem of inconsistent physical interface specifications of USB interfaces and the power only A new interface developed to overcome the disadvantages of one-way transmission, it integrates charging, display, data transmission and other functions. The biggest feature of the Type-C interface is that it supports insertion in both front and back directions, officially solving the worldwide problem of "USB can never be plugged in correctly". It can be plugged in either way.

The operating environment of this tutorial: HarmonyOS 2 system, HONOR V30 mobile phone.

Talk about USB

You will definitely say, I know this, it is the following one

Yes, this is indeed a USB interface, but in fact the full name of this interface is USB Type-A, in addition to the USB family there are also USB Type-B, USB Type-C.

Are you very familiar with the USB Type-C interface, haha. Nowadays, the charging interface of many Android phones is like this. It solves the "never plugged in correctly" problem of USB Type-A. But in fact, USB Type-A, USB Type-B, USB Type-C all refer to the shape of the interface. What do they mean? Because USB also has protocol divisions, I believe you have also heard of USB 2.0, 3.0, and 3.1. This actually refers to the transmission protocol. If you don’t understand the transmission protocol, you can simply understand it as the transmission speed. , the larger the number, the faster the transmission speed.

Currently the most commonly used one is USB3.1, USB3.1The ultimate speed can reach 10GB/S, USB3 .1 is divided into Gen1 and Gen2. The maximum transmission rate of Gen1 is 5Gb/s, Gen2The maximum transmission rate is the declared limit speed10Gb/s, so: when buying digital products, make sure it is Gen2 or Gen1, don’t be fooled Cheated.

As for the transmission rate, if you just look at the interface shape, you can’t tell it, because for example, USB3.1 Gen1 and Gen2 their interface shapes are both It's the same, you can't tell the difference. So how to tell the difference? Intel requires bandwidth tips to be marked next to the interface and next to the data cable. The bandwidth will be written in the upper right corner, as shown below

PS: But I found that some interfaces do not have this number logo, you can only find a way to distinguish them yourself at this time.

Let’s talk about what type-c means

Type-C is a USB interface form currently adopted by the mainstream. Its full name is: USB Type-C , its core characteristics can be summarized in three words: "fast, strong and small". Compared with previous generations of traditional interfaces, Type-C can be more advanced and simultaneously support charging, data transmission, image transmission and other functions, truly realizing the powerful use of "one mouth for multiple purposes".

Type-C is a hardware interface specification for the Universal Serial Bus (USB); it was born with the latest USB 3.1 standard. Released by the USB-IF organization in August 2014, it is a brand-new interface developed by the USB standardization organization to solve the long-term disadvantages of USB interfaces such as inconsistent physical interface specifications and the only one-way transmission of power. It integrates charging, display, and data transmission. functions in one.

In 2014, the Type-C interface standard was officially born. Subsequently, Apple completely canceled the power interface, USB interface, DP interface, HDMI interface, and VGA interface on the Macbook laptop released in 2015, and integrated them into a Type-C interface to realize all the above functions. As a result, the Type-C interface is completely popular.

#The biggest feature of the Type-C interface is that it supports insertion in two directions, front and back, which officially solves the worldwide problem of "USB can never be plugged in correctly". It can be plugged in at will. .

The Type-C interface mainly has the following advantages:

First, the interface is smaller. Compared with the past USB Type-A interface, Type-C greatly reduces the interface area and is more suitable for application in various slim devices;

Second, support "front and back blind insertion". Since the front and back designs of the Type-C interface are exactly the same, the "front and back blind insertion" function is perfectly realized, and users do not need to worry about "the USB is always not plugged in correctly";

Third, Supports fast charging and two-way charging. The Type-C interface supports the USB PD protocol, a power transfer protocol, which can achieve higher voltage and current. It can be expanded to an output voltage of 20V and a maximum output current of 5A, which is a maximum output power of 100W, which greatly improves the charging speed.

In addition, it can freely change the direction of power transmission, charging itself and charging external devices in reverse. Based on this principle, we can use a USB Type C to C cable to achieve series charging.

Fourth, it supports the USB3.1 standard, and the maximum data transmission speed can reach 10Gbit/s. However, not all Type-C interfaces support the USB 3.1 standard. It may also only support USB2.0, USB3.0 and other transmission protocols. This is something you need to pay special attention to.

Fifth, extremely rich functional scalability. As mentioned before, the Type-C interface integrates charging, data transmission, image transmission and other functions. In other words, using only one Type-C interface cable solves the problem of different interface cables such as HDMI, DVI, and VGA.

In summary, Type-C not only has extremely advanced functions, but also has smaller size, higher compatibility and performance. Therefore, it has been widely used in computers and smart phones. It has gradually become a mainstream unified interface recognized by the public in various electronic products such as mobile phones, tablets, peripheral accessories, and storage hard drives.

What’s more worth mentioning is that after the emergence of the latest USB 3.1 transmission standard, the Type-C interface has become its only recommended interface. In the Thunderbolt 3 interface launched through in-depth cooperation between Apple and Intel, the previous mini DP was also replaced by USB Type-C. These changes have undoubtedly promoted the vision of the Type-C interface to achieve "great unification" in the future.

Appendix: Regarding USB brain-burning naming and protocol

As of the time of publication, the USB family has released USB3. 2 standard and unified the new naming. All USB will now be called USB 3.2, so how to distinguish the speed? Listed below are the before and after name changes

## 5GbpsUSB 3.1, and the original USB3.0 was renamed

##Before the name change	Bandwidth	##After name change
##USB 3.0	##USB 3.2 Gen 1
##10Gbps	USB 3.2 Gen 2	##USB 3.2
20Gbps	##USB 3.2 Gen 2× 2	##After USB3.1 was launched in 2013, it got a new name: USB3.1 Gen2

USB3.1 Gen1

in 2017 USB3.2 (20Gbps ) reached the peak of brain-burning after its launch. Its full name is USB3.2 Gen2x2, and at this time, USB3.1 and USB3.0 were replaced by Renamed USB3.2 Gen2(10Gbps)

and

USB3.2 Gen1(5Gbps). All USB protocols: For more related knowledge, please visit the

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