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USB Type-C
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USB Type-C : ウィキペディア英語版
USB Type-C

USB Type-C is a specification for a reversible-plug connector for USB devices and USB cabling. It was published by the USB Implementers Forum.
Developed at roughly the same time as the USB 3.1 specification, but distinct from it, the USB Type-C Specification 1.0 defines a small reversible-plug connector for USB devices.
==Details==
The Type-C plug connects to both hosts and devices, replacing various Type-B and Type-A connectors and cables with a standard meant to be future-proof.〔(【引用サイトリンク】title=USB Type-C Connector Specifications Finalized )〕 The 24-pin double-sided connector is similar in size to the Micro-B USB connector, with a type-C port measuring by . The connector provides four power/ground pairs, two differential pairs for USB 2.0 data bus (though only one pair is implemented in a Type-C cable), four pairs for high-speed data bus, two "sideband use" pins, and two configuration pins for cable orientation detection, dedicated biphase mark code (BMC) configuration data channel, and VCONN +5 V power for active cables.〔(【引用サイトリンク】title=Technical Introduction of the New USB Type-C Connector )〕〔(【引用サイトリンク】title=DisplayPort Alternate Mode for USB Type-C Announced - Video, Power, & Data All Over Type-C )〕 Connecting an older device to a host with a Type-C receptacle requires a cable or adapter with a Type-A or Type-B plug on one end and Type-C on the other end. Cables and adapters with a Type-C receptacle are not allowed.
Full-featured USB Type-C cables are active, electronically marked cables that contain a chip with an ID function based on the configuration data channel and vendor-defined messages (VDMs) from the USB Power Delivery 2.0 specification. USB Type-C devices also support power currents of 1.5 A and 3.0 A over the 5 V power bus in addition to baseline 900 mA; devices can either negotiate increased USB current through the configuration line, or they can support the full Power Delivery specification using both BMC-coded configuration line and legacy BFSK-coded VBUS line.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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