In recent years, more and more mobile phones and notebooks are equipped with type-c interface as standard. From USB flash disk to Portable storage device interface, type-c interface begins to be popularized rapidly, just like opening the strange Pandora's magic box. Computers, speakers, Small appliance, UAVs, etc., all have type-c plug interface.

The feature is both positive and negative pluggable, which describes the previous type-a interface as perfect. After plugging in for a long time, it couldn't be plugged in either direction, and I once doubted life. Players who have used the type-c interface should know that it is really easy to use, and can be plugged in both positive and negative directions.

In case of poor lighting, we no longer need to worry about its front and back like micro USB and type-a sockets.

It can be said that it has officially solved the global problem of 'USB never plugs in', which is enough to quickly kill other USB interfaces.

Functional bidirectional charging, strong power supply capability. Type-C interface can provide bidirectional power supply, which can charge both the device itself and external devices.

As long as your phone supports OTG function, it can power other devices, such as wireless headphones and external speakers, to solve urgent needs.

In addition, the type-c interface also supports a maximum power output of 100W. If you carefully observe, it will be found that most fast charging heads on the market now have a power output exceeding 30W.

Type-c is just an abbreviation for a physical interface. Full PIN (24PIN) is assigned to many protocols, such as PD protocol, audio protocol, video protocol, lightning protocol, and so on. It is nothing more than three forms of pure charging: charging plus data transmission, charging plus data transmission plus DP data transmission.

The following is a cross-sectional view of the type-c interface;

The upper part is a type-c female head, and the lower part is a type-c male head. The male head has one set of D+D - and one CC less than the female head, which is designed to facilitate forward and backward insertion.

PD protocol: Any cable with a maximum power of 100W and a power carrying capacity of over 60W must have an electronic label and be able to communicate with the DFP port.

If a cable with an electronic label is inserted into a socket that does not support USB power supply specification 2.0, its behavior is exactly the same as that of a standard passive cable, requiring a PIN (VBUS+GND+CC)

Audio protocol: Type-c analog headphone CC+Vconn pull-down grounding (GND) D+D - USB2.0 data SBU1+SBU2 microphone signal Type-c digital headphone CC1 and CC2 must have a pull-down resistor Rd above them

Video protocol: TX1+/- RX1+/- DP video signal, TX2+/- RX2+/- USB3.0 data, if higher bandwidth is required, TX1+/- RX1+/-, TX2+/- RX2+/-, DP video signal bandwidth is higher, and video resolution is higher.

Thunderbolt Protocol: Intel's unique protocol has a bandwidth of up to 40Gbps, with a DP video signal resolution of up to 8K and a USB data rate of 3.1gen2 (10Gbps),

The information is designed based on the case structure, for reference only, and can also be developed based on one's own PCB circuit.

The type-c Docking station equipped with a high-speed interface has strong scalability. It can not only charge and transmit data, but also use one type-c interface as several interfaces, which is faster and better.

The type-c interface has versions 3.0 and 3.1, of which the maximum data transmission speed of version 3.1 can reach 10Gbps/s, which is twice as fast as that of traditional usb 3.0. Therefore, consumers need to be clear about the interface version when purchasing.

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