What does type-c interface mean?

Type-C is a new USB interface form (USB interface also has Type-A and Type-B), it is a hardware interface of Universal Serial Bus (USB) Specification; it was born with the latest USB 3.1 standard. Released by the USB-IF organization in August 2014, it is a 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.

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 either way.

Technical Features

The 5 main features of Type-C make USB Type-C a flexible and scalable interface.

1. Power supply

The default 5V power supply of the USB Type-C interface is backwards compatible with the previous USB interface. Not only that, the new USB Type-C interface contains 4 pins dedicated to power supply and grounding. The "USB Power Delivery Specification" enables the USB Type-C interface to support a voltage of up to 20V and a current of 5A.

2. Symmetrical connection

The USB Type-C interface is symmetrical, so its insertion and extraction and the direction of the cable can be reversed. The liberation of the plugging and unplugging direction solves the main trouble caused by the previous interface. In the past, the type of interface indicated the function of the attached device (Type-A interface for the host, Type-B interface for the external device). The USB Type-C interface can be connected to either end, and the function is defined by the hardware being connected. The interfaces at both ends of the USB Type-C cable are the same, so plugging and unplugging the cable is simplified.

3. Bandwidth

USB Type-C supports USB 2.0, USB3.1 Genl (SuperSpeed ​​USB 5Gbps) and USB 3.1Gen2 (SuperSpeed ​​USB10Gbps) data transfer rates. USB 2.0 and USB 3.1 are each defined by separate specifications. SuperSpeed ​​USB differential signal pairs are distributed on both sides of the interface, so when plugged into the interface in either direction, a set of SuperSpeed ​​USB signal transmission connections is used.

4. Channel Configuration

The USB Type-C interface contains 2 channel configuration (Channel Configuration) signal pins (CC1&CC2) for function negotiation. The above signals determine the interface insertion direction and are used to negotiate the power supply function, alternative mode and peripheral mode on the interface.

5. Non-USB signal transmission

The USB Type-C interface supports a variety of OEM product customization modes to expand device functions. Signal redistribution is achieved through negotiation on the CC channel. The interface can enter two modes, peripheral mode and alternative mode. To enter peripheral mode, a simple logic test is done on the CC channel to determine which peripheral mode is required. To enter alternative mode, Biphase Mark Code (BMC) is used on the CC channel for bidirectional communication to properly set up the link. During this negotiation process, devices at both ends need to agree on the redistribution of signals before making any changes. All USB Type-C interfaces are required to be used as USB-compatible interfaces in non-replacement mode or non-peripheral mode.

Advantages:

TYPE-C hardware interface has obvious characteristics, mainly including the following points:

(1) Supports positive and negative Symmetrical plugging and unplugging solves the problem of reverse plugging in practical applications;

(2) The interface is slim and can support thinner and lighter devices, making the design of portable devices thinner and smaller; (3) Supports higher power transmission, up to 100 watts, and supports more high-power load devices.

(4) Support single port and dual port TYPE-C, flexible application.

(5) Supports two-way power transmission, both sending and receiving power.

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