USB Type-C is aUSB interfaceStandard appearance, smaller size than Type-A and Type-B, which can be applied to both PC (main equipment) andperipheral（Slave device, such as mobile phone)Interface type[1]。USB Type-C has 4 pairs of TX/RX branch lines, 2 pairs of USBD+/D -, 1 pair of SBU, 2 CC, 4 VBUS and 4Ground wire[2]。
From 2024, USB-C will become the general standard for electronic equipment in the European Union.USB-C will be used as the EU general port, allowing consumers to use any USB-C charger to charge any brand of equipment.[16-17]
On May 15, 2022,AppleanalystGuo MingxuanThe paper said that in the foreseeable future, other products based on Apple Lightning interface (such as AirPods, Magic Keyboard, etc.) will also be changed to USB-C interface.Previously, he revealed that the newiPhoneLightning interface will be abandoned in the second half of 2023 and USB-C interface will be used instead.[8]
On October 4, 2022 local time, the European Parliament overwhelmingly passed a bill stipulating that from the autumn of 2024, USB type-C (USB-C for short) will become a smart phone, tabletE-reader, digital camera, headset, handheldVideo game consoleAnd portablespeakerStandard charging port of electronic equipment such as;From 2026, USB-C will also become thestandard interface 。[10-11]
On October 24, 2022 local time,European Council Approved that from 2024, all kinds of mobile phones, tablets, digital cameras and other electronic devices sold within the EU must use Type-C charging interface in a unified way, and consumers are purchasingElectronic equipmentYou can also choose whether to purchase another charger.The laptop is allowed to use the unified charging interface for 40 monthsGrace period。[12]
On October 25, 2022, Apple confirmed that it would comply with EU requirements, and all smart phones would use the USB-C charging port from 2024.[13-14]
On December 8, 2022, the European Union will force the unified use of USB-CtermYes, on December 28, 2024, Apple's iPhone must be replaced.[15]
The European Commission announced that from 2024, USBType-C will become the general standard for electronic equipment in the EU, and by 2026, this provision will also apply to laptops[18]。
Universal charging
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On December 30, 2023 local time, the European Commission said that from 2024, USB-C will become the general standard for electronic equipment in the European Union.USB-C will be used as the EU general port, allowing consumers to use any USB-C charger to charge any brand of equipment."Universal Charging" requirements will apply to all handheld phones, tablets, digital cameras, headsets, portable speakers, handheld electronic game consoles, e-readers, earplugs, keyboards, mice and portable navigation systems.By 2026, these requirements will also apply to laptops.[16-17]
Pin definition
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To understand the principle of Type-C, first of all, we need to understand the definition of its PN. The Type-C port has four pairs of TX/RX branch lines, two pairs of USBD+/D -, one pair of SBUs, two CC, and four VBUS and four ground wires[2]。
Of course, if the receiver only needsDPSignal, not requiredUSB 3.1Signal, DP can use all 4 pairs of TX/RXDifferenceLine as output, so as to achieve up to 4 lanes of DP output, providing up to 32.4Gbps of total outputbandwidth(Each lane can output 8. IGbps), easily realizing 5Kx3K 60 frame video, even up to 8K ×4K60 frames of video (4:2:0 data), this mode is DPonly mode[2]。In addition, in order tocompatibleUSB2.0, Type-C also reserves USBD+/D-signal forUSB 2.0The device is used, so only Type-CInterface, USB2.0 and even USB 1.0 devices can support front and back insertion.It is worth mentioning that the DP+USB2.0 mode can be realized by using USBD+/D - to cooperate with the DP only mode above.DP occupies 4 pairs of TX/RX differential lines, and USB only uses D+/D-[2]。Generally, USB2.0Differential signalOnly one side will be connected, because USB Type-C Plug has no B6 and B7. USB3.1 only uses two pairs of TX/RX differential lines asdata lineConnect TX1/RX1 during forward insertion and TX2/RX2 during reverse insertion. It can be seen that in any case, two pairs of differential lines will not be used. DP alternating mode is to load DP signals onto these two pairs of "redundant" differential lines, so as to realize simultaneous operation of USB 3.1+DP[2]。
Type-C also provides 2 CC lines and 2 SBU lines.CC cable is mainly used for communication of Power Delivery module (hereinafter referred to as PD). First, CC cable is used to determine the direction of equipment insertion: forward insertion or reverse insertion. If it is forward insertion, the host uses CC1 to communicate with the equipment, and reverse insertion uses CC2. It can be seen that CC usesSingle line protocol。SBU cable at DP（DisplayPort）When the function is turned on, it incarnates as the AUX_P/AUX_N differential line in the DP protocol (its polarity can be modified according to the forward and reverse insertion directions), responsible fortransmission equipment DPCD of,EDIDAnd other key information[2]。
USBType-C socket end view[2]
View of USB-Type-C plug outlet
Technical characteristics
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On January 7, 2013,USB3.0 Promotion organizationConsumer Electronics ShowThe first batchtransmission speed The equipment up to 10GB/s will be launched in 2014USB interfaceUSB3.1 standard, namely Type-c interface, is adopted.The size of Type-c interface socket end is about 8.3mm × 2.5mm in slim design;It supports the "positive and negative insertion" function that can be inserted from both the positive and negative sides, and can withstand 10000 times of repeated insertion and removal;The standard specification connecting wire equipped with Type-c connector can pass the 3Aelectric currentAt the same time, it also supports "USB PD" with USB power supply capability, which can provide up to 100W of power[3]。
Type difference
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Type-A is the most widely used computer and electronic accessoriesInterface standard, mouseUSB drive. Most data lines have this interface, which is also the largest.
Type-C has a much smaller volume than Type-A and Type-B, and is the latest USB interface appearance standard. This interface has no difference between the positive and negative directions, and can be plugged in and pulled out at will.[1]。
Main characteristics
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in order toData exchangeNeeds, TElectronic equipmentUSB interface is provided, whether it is PC, tablet point, mobile phone or evenDisplay device。Almost without exception, there are USB interfaces.However, due totechnical standardThe USB plug has“directional”If the direction is wrong when inserting, either it cannot be inserted or the interface or connector is damaged.In this case, Appleequipment design Lightning[4]The interface can be inserted in both directions, so users don't have to worry about incorrect insertion.In addition to Apple devices, the industry has also introduced a positive and negative pluggable interface standard: USB Type-C[4]
USB Type-C is ainterface specification , which consists of Type-C plug and Type-CSocketform.In variousMobile DevicesAnd PC, Type-C has become the most promisingdata interface 。With the gradual maturity of Type-C technology, all kinds of new products will be launched in 2017electronic productAlso choose to configure the full Type-C interface[4]。
In fact, the most intuitive advantage of Type-C is its excellent front and back pluggable interface design, so that users can get rid of the trouble of plugging.More importantly, Type-C interface has powerfulcompatibility, so it can connect PC, game console, smart phonestorage deviceAnd expand the standardized interface of all electronic equipment, and realizedata transmissionAnd power supply, for example, two display devices are used together through a Type-C line[4]。
In addition, Type-C also supports the USB3.1 standard.The maximum power supply of this standard is 100W, and the voltage and current will increase;The coding loss is reduced from 20% of 3.0 to 3%.In other words, users can quickly transfer data and video through Type-C, or charge faster.The standard also allows users to charge other devices with their own mobile phones.aboutmonitorFor example, even the relatively high-endHDMIandDP interfaceIt is also unable to supply power for the display. When Type-C is used for data transmission, there is no need to use anotherpower cordIt supplies power to the display and solves the problem of messy desktop wires[4]。
Standard protocol
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In September 2021,USB-IFThe organization released the latest USB Type-C interface and cable v2.1 standard protocol, and the power supply capacity has been improved from 100W to 240WGamebookYou don't even need a separateThe power adapterHas.[5]
On April 21, 2022, according to Apple Insider, EU officials voted in favor of a long planned proposal to require Apple and all technology companies to adopt USB-C as theUniversal charger, and addWireless chargingNew requirements of standardsAsk.[7]
Report Data
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In Omdia's 2021 USB Type-C Report, the research institute Omdia found that in 2020, almost 80% ofNotebook computerAnd almost half of smart phones have USB-C interfaces, and the adoption rate of these two devices is expected to continue to grow.The adoption of these core equipment has stimulated the adoption of satellite equipment and opened the door to new uses such as portable desktop displays and general docking stations.
Notebook computers and smart phones are the core devices most likely to provide full function USB-C, and power, data and audio-visual signals can be obtained through a single line.[6]
