USB 3.1 TYPE C Connector Introduction
First of all, USB 3.1 is the standard, and shouldn’t be confused with the shape of the ports in your computer or the cables that plug into it. USB 3.1 devices and computers can use both of the current plugs: Type-A, the rectangular plug that’s used by the majority of devices, Type-B, the square-shaped plug that’s mostly used for printers, external hard drives. Smaller plugs like Mini USB and Micro USB may not be compatible, so sometimes the expanded USB Micro Type-B is used, as on phones. This allows for the faster data transfer rate in the USB 3.0 spec, but still allows the older Micro USB cables to be used for standard charging and data transfer.
As we progress into 2016 and beyond, expect more full motherboards, laptops, tablets, and smartphones to be equipped with USB 3.1 Type-C Connector, which are desirable thanks to their small size and reversible design. These ports may or may not be equipped with USB 3.1 or later revisions, due to expense or hardware compatibility.
The biggest improvement for the USB 3.1 standard is a boost in data transfer bandwidth of up to 10 gigabits per second. The new SuperSpeed USB specification in Generation 2 of USB 3.1 delivers improved data encoding and efficiency, doubling the speed of the Generation 1 standard (5Gbps). To put it into more practical terms, the contents a fully-loaded 50 gigabyte Blu-Ray disc could be transferred over USB 3.1 Generation 2 in just 38 seconds.
Of course, that’s assuming that you have the correct ports and cables on both ends, and that both the reading device and writing device can transfer data at that rate – the fastest consumer-grade solid state drives can only write data at a fraction of that speed. Also, Generation 2 is so new that there are very few devices currently supporting it. The slightly older standard, USB 3.1 Generation 1 only supports speeds of up to 5 gigbits per second, which is the same speed as USB 3.0. USB 3.0 and USB 3.1 Gen 1 are very similar, in fact – the latter is mostly notable thanks to the few Type-C devices that support it as well.
That being said, any USB 3.0, 3.1 Gen 1, or 3.1 Gen 2 device is preferable to the older USB 2.0 standard, which tops out at 280 megabits per second, dramatically slower than all later alternatives.
Modern devices like phones, tablets, and even laptops are being equipped with bigger and more efficient batteries, so getting as much electricity to them as safely possible is a necessity. The latest quick-charging technologies can draw up to 15 watts and charge devices much faster than the older 2.1 standard. Even so, that’s not enough to satiate the thirst of manufacturers.
USB 3.0 and 3.1 both support the USB Power Delivery specification, which supports a maximum of 20 volts at 5 amps for a total of 100 watts of power. What that means is that there are very few portable devices that cannot be accommodated with this standard – the recently-released Macbook and Chromebook Pixel models are both charged via their USB ports with a standard power adapter, using 29 watts and 60 watts, respectively.
Here’s where things get confusing. Intel’s proprietary Thunderbolt standard, which competes with USB 3.1, is sometimes compatible with it using the same cables. First, let’s compare speed. Thunderbolt version 3 can handle data transfer at up to 40Gbps, potentially four times as fast as USB 3.1 Gen 2. Thunderbolt versions 1 and 2 used a proprietary cable that is not compatible with USB, so some computers like the Macbook Pro included both USB and Thunderbolt 3 ports.
Starting with Thunderbolt 3, Intel switched to USB 3.1 Type-C Connector and cables and made the standard cross-compatible with USB 3.1. That means that if the manufacturer supports it, the same device can use both Thunderbolt and USB 3.1 operating modes to transfer data, video, and power. The USB Type-C port on the 2015 Macbook is compatible with both USB 3.1 Gen 1 and Thunderbolt 3 standards, and adapters for standard USB Type-A and older Thunderbolt ports and cables are available.
USB 3.1 Gen 1 is already available on many motherboards and a few portable devices, and the faster Gen 2 standard is appearing on portable hard drives, enclosures, and adapters. As the Type-C port gains popularity with laptop and phone manufacturers, USB 3.1 Gen 1 and Gen 2 will likely spread through the consumer electronics industry much faster. Expect flagship phones to begin supporting the Gen 2 standard later this year, with laptops and desktops to follow in 2016.
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本文由上山打老虎转载自KOSODSWITCH News，原文标题为:USB 3.1 TYPE C Connector Introduction，本站所有转载文章系出于传递更多信息之目的，且明确注明来源，不希望被转载的媒体或个人可与我们联系，我们将立即进行删除处理。
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