如需要USB 3.1 TYPE-C 規范標準(版本:1.4)，請文末留言郵箱地址，我們將整理后統一發送協會最新的規范！

USB-C, formally known as USB Type-C, is a 24-pin USB connector system, which is distinguished by its two-fold rotationally-symmetrical connector.

he USB Type-C Specification 1.0 was published by the USB Implementers Forum (USB-IF) and was finalized in August 2014.It was developed at roughly the same time as the USB 3.1 specification. In July 2016, it was adopted by the IEC as "IEC 62680-1-3"A device with a Type-C connector does not necessarily implement USB 3.1, USB Power Delivery, or any Alternate Mode: the Type C connector is common to several technologies while mandating only a few of them.

USB 3.2, released in September 2017, replaces the USB 3.1 standard. It preserves existing USB 3.1 SuperSpeed and SuperSpeed+ data modes and introduces two new SuperSpeed+ transfer modes over the USB-C connector using two-lane operation, with data rates of 10 and 20 Gbit/s (1250 and 2500 MB/s)

現在每個廠商都說自己產品有快充，真正意義的快充是需要充電器、手機、線材三者匹配，才能實現快充，對于高通QC、MTK PE等傳統高壓快充，對線材的要求最低，正規的普通usb數據線即可，對于OPPO、VIVO和華為等大電流快充，對線材的需求稍高，需要能過大電流線材,所謂的大電流最簡單的方法就是加大導體直徑降低電阻即可達成，沒有啥技術含量.

真正的type-c快充線是指支持USB-PD快充協議的線材，這種線材兩端都為type-c接口，就是我們所描述的滿PIN線材，具體參照：Type-C技術參數集錦

PD快充協議本身是type-c標準的一部分，支持給手機、平板、筆記本充電，支持雙向供電，大有取代和統一快充標準之勢。其電壓電流功率組合非常多（5-20v 0-5A 18W 30W 45W 65W 100W），握手通信過程遠復雜于其他快充標準，涉及到一定的數據通信.
因此僅靠普通usb接口無法實現，必須采用type-c對type-c的數據線才能實現pd快充。（Type-c是24pin接口，有專門用于快充通信的引腳。而普通USB 3.0的接口只有9pin，沒有專用于快充的引腳，只能復用引腳).參照下圖的引用描述

USB Type-C Cable and Connector Specification

ReceptaclesThe receptacle features four power and four ground pins, two differential pairs for high-speed USB data (though they are connected together on devices), four shielded differential pairs for Enhanced SuperSpeed data (two transmit and two receive pairs), two Sideband Use (SBU) pins, and two Configuration Channel (CC) pins

Plugs,具體參照：Type-C 技術參數圖解發布

The male connector (plug) has only one high-speed differential pair, and one of the CC pins is replaced by VCONN, to power electronics in the cable, and the other is used to actually carry the Configuration Channel signals. These signals are used to determine the orientation of the cable, as well as to carry USB Power Deliverycommunications.

Cables，具體可以參照：Type-C技術參數集錦

Alternate Mode partner specifications

As of 2018, five system-defined Alternate Mode partner specifications exist. Additionally, vendors may support proprietary modes for use in dock solutions. Alternate Modes are optional; USB-C features and devices are not required to support any specific Alternate Mode. The USB Implementers Forum is working with its Alternate Mode partners to make sure that ports are properly labelled with respective logos