USB interface standard-silly is not clear, the consumer does not back-USB,TypeC,Micro USB-IT information

More than 10 years ago, USB bus entered the mainstream, providing a brand new store, many with a unified standard peripherals are all drawn into their camp. This is their great contribution for the whole industry, no one would deny that. But the Organization has a special name to promote USB tips, makes elusive: today, after more than 10 years, evolution has three versions of the USB standard, not only has made a bunch of aliases, USB 3.1 comes out Gen1 and Gen2, mention the mini, micro, Type-ABC interface pattern definition.

It will let these people be called a pain ever from the interface and plug colors at a glance to figure out which one is faster, look at these new pop up something silly now does not know, people who don't want to USB-IF the name back, it's time to be a general ledger.

Full? High? Super? Sorry my English is not very good ... ... Back to USB 1.0 from 20 years ago and as of today is widely accepted by the 3.0,USB iteration of the standard has undergone a total of four versions: 1.0, 1.1, 2.0, and 3.0, see Arabic numerals, people can know which version of the primary school mathematics exam is more advanced. But USB-IF there is a stage name of one, they give transfer rate name: 1.5Mbit/s call Low Speed, 12Mbit/s is Full Speed, 480Mbit/s Hi-Speed, 5Gbit/s just SuperSpeed, impact of language than the cold figures are.

Unfortunately transmission rate linked to the will and the USB version of the standard, so USB-IF to name a few USB version directly over the rate to call it up like it's sense, such as Hi-Speed USB and SuperSpeed USB. Problem came when one thing when there are different labels, once you mix people scratching their heads. We look soon, how do I know which one is USB 3.0? USB also has a great feature called backward-compatible, so USB-IF is just a new standard "eat" the old standard, and then into old transfer rate is below the new standard, and in rare cases you can see wonderful like Full Speed USB 2.0.

This mess was supposed to be a unable to clean up the situation, but USB-IF at the moment think of a surprise move to promote USB 3.0 a – change the interface color. They decided to let the USB 3.0/SuperSpeed USB devices using blue as the interface of the standard plastic color, to distinguish between interface and old standards. People celebrate in time, even if it is a myopia can be recognized which interface standards updates are faster. Hardware manufacturers and raw materials while another 5 pin connectors were looking and feel the heartache, but gritted his teeth on the new interface, effects compared to the cost increase is worth it.

Force generation in the convincing USB 3.1 is divided into two but 2013 Intel two Thunderbolt interface data stream into a stream, the transmission rate of up to 20Gbit/s, USB-IF look at your speed is 4 times I am not. In July of that year, open USB USB organization 3.1 standard. In accordance with the usual logic USB 3.1 is USB 3.0 upgrade, but today discussed USB 3.1 is faster than USB 3.0, or there is any other progress is a topic that does not hold, because the USB 3.0 is not in the definition of USB-IF. Left by current standards, in addition to representatives of outside Hi-Speed USB 2.0 standard, only the SuperSpeed USB and SuperSpeed USB 10Gbps.

Don't dominate the peripherals and mobile storage connectivity USB 3.0 standard that was declared for several years died suddenly? Obviously not, just USB-IF Naming Convention is very bad. You should just see above, USB-IF also called USB 3.0 SuperSpeed USB, so it seems that the SuperSpeed 10Gbps is USB 3.1? Na?ve. USB and USB 3.1 Gen 3.1 Gen 1 22 brothers and gorgeous time, you want to do will be in charge of USB-IF names of people head into the monitor. So-called USB 3.0 USB 3.1 Gen 1 is the original, truly new is this thing called USB 3.1 Gen 2 standard. As for the transmission rate of the English name, much as USB-IF like, we'd better choose to ignore.

Just from the look on paper data, USB 3.1 Gen 2 standard doubling theoretical transfer rate to 1 time to catch up with the first generation of Thunderbolt, also encoded bit-width from tens up to hundreds at the same time, cut the signaling overhead from 20% to 3%, can be described as significant progress. But the firms the accepting of the new standard cost and compatibility challenges quit, so they would rather meet the USB organization named head fake "upgrade" USB 3.1, do not want to make great efforts to apply the new interface. So now the vast majority of claims to support "USB 3.1" standard, but refused to say whether Gen 1 or Gen 2 of the electronic products and PC Accessories, bones are actually is USB 3.0 capabilities.

You say almost thought USB Type-C = USB 3.1 for adjusting to a different kind of device, USB Type-C before the form distinction from an interface, USB interface USB 2.0 standard Type-A,USB Type-B,miniUSB Type-B, microUSB Type-A as well as microUSB Type-B five (excluding already was eliminated), and USB Also emerging USB 3.0 3.0 Type-A, and microUSB and USB 3.0 Type-B 3.0 Type-B. We most often come into contact with in their daily lives are USB Type-A and the microUSB and USB 3.0 Type-A Type-B. Because of the colors and shapes of the double distinction, people can more easily identify the use of interface and speed.

But in 2014, USB IF released has USB Type-C of 1.0 version defined, this interface just defined has a not plug anti-of new interface form, it 24 a of touch points number far beyond existing USB standard defined of 4 a or 9 a, so even USB Type-C can through turned received of form compatible old standard, but it is not a to adapted existing USB standard for purpose of interface, this interface is for future and prepared of. As USB Type-C is almost and USB 3.1 front with the rear foot appeared, plus nobody cares at all before my daily plug plug of the USB interface Type is, and many people instantly lost, often confuse the two .

But the reality is that USB 3.1 Gen 2 is a transmission standard, USB Type-C it is just a suitable physical carrier. USB Type-C USB 2.0 and USB 3.1 Gen 1 protocols can be hosted, and now more and more Smartphones that use USB Type-C interface is a good example. USB Type-C can do things much more than 10Gbit/s high speed movies: support USB PD 2.0 USB Type-C to 20V/5A (the 100W) of power for large notebook power supply and USB Type-C can add-in that supports DP additional mode compatible with the mode of the display; Intel even in the third generation of the Thunderbolt on the standard definition of selected shared with USB Type-C interface.

Three words chaos can now clear USB standard for full-text summary in a few simple words:

1, USB 3.0 connector is usually blue, will have more than 5 contacts, and USB 2.0 interface contacts does not exceed 5;

2, USB 3.1 Gen1 is USB 3.0 for a waistcoat;

3, do not see USB Type-C thought it would be faster, speed, please look for USB 3.1 Gen2.

USB ultimate orientation must be walked to their USB Type-C/USB 3.1 Gen2, but a new standard interface will spend at least a few years ' time, we will face in the future coexistence of new and old standard chaos, first good shot, contact device with USB interface within the next few years will know, refusing to be hang out.

USB接口标准傻傻分不清，这个锅消费者不背 - USB,TypeC,Micro USB - IT资讯

十多年前，USB总线进入主流视野，提供了一个全新的存储方向，并用一个统一的标准把众多外设都全部拉入自己的阵营。这是他们为整个行业带来的巨大贡献，没有人会否认。但是推广USB的组织有着特殊的取名技巧，让人捉摸不透：十多年后的今天，进化了三个大版本的USB标准，不光搞出了一大堆别名，USB 3.1的出现还分出Gen1和Gen2，更别提那些mini、micro、Type-ABC的接口形态定义了。

这让我们这群普通人看得那叫一个疼，以往还从接口和插头的颜色一眼就判断出哪个是速度更快的，现在看着这些新冒出来的东西傻傻分不清楚，不想为USB-IF取名品味背锅的人们，是时候好好算一笔总账了。

Full？High？Super？抱歉我英语不太好……回望USB从二十年前的1.0起，截至今天广泛为人所接受的3.0，USB标准总共经历了四个版本的迭代：1.0、1.1、2.0和3.0，光看阿拉伯数字的话，小学数学及格的人都能知道哪个版本更为先进。但USB-IF有一个起艺名的嗜好，他们给传输速率也起了名字：1.5Mbit/s叫Low Speed、12Mbit/s叫Full Speed、480Mbit/s叫Hi-Speed、5Gbit/s就是SuperSpeed，语言的冲击力可比冷冰冰的数字大多了。

很遗憾的是传输速率一定会和USB标准的版本挂钩，所以USB-IF觉得给几个USB版本直接上套速率的名字给称呼起来好像也挺带感，比如Hi-Speed USB和SuperSpeed USB。结果问题来了，当一个东西存在多种叫法的时候，一旦搅混就让人摸不着头脑。大家看起来都很快呀，我怎样才能知道哪一个是USB 3.0？而且USB还有一个很棒的特性叫做向下兼容，所以USB-IF也就干脆让新标准“吃掉”老标准，然后把旧的传输速率也划分到新标准下面，所以在极少情况下你能看到像Full Speed USB 2.0这样的奇葩。

这一团乱麻本该是一个无法收拾的局面，好在USB-IF在推广USB 3.0的关头想到了出奇制胜的一招——改接口的颜色。他们决定让USB 3.0/SuperSpeed USB标准的设备统一采用蓝色作为接口塑料板的配色，以和旧标准的接口区分开来。群众一时间弹冠相庆，哪怕是近视都能一眼认出哪个接口标准更新速度更快了。下游硬件厂商虽然看着接插件又多了5个pin而感到肉痛，但咬咬牙上了新接口，推广效果相比成本的增加还是值得的。

强行把USB 3.1分成两代在下心服口服但好景不长，2013年Intel把Thunderbolt接口的两股数据流拧成一股，达到20Gbit/s的传输速率，USB-IF看着你速度都已是我4倍，深感不能忍。当年7月，USB组织公开USB 3.1标准。按照通常的逻辑，USB 3.1就是USB 3.0的升级，但在今天讨论USB 3.1是不是比USB 3.0更快，或是存在什么其他的进步却是一个不成立的话题，因为USB 3.0已经不存在于USB-IF的定义里了。留下的现行标准里，除了代表2.0标准的Hi-Speed USB外，只有SuperSpeed USB和SuperSpeed USB 10Gbps。

难道统治了外设及移动存储连接界好几年的USB 3.0标准就这么被宣布突然死亡了？显然不是，只是USB-IF的命名习惯实在太差。你刚刚应该在上面看到过，USB-IF还管USB 3.0叫SuperSpeed USB的，那如此看来这个SuperSpeed 10Gbps便是USB 3.1了？天真。USB 3.1 Gen 1和USB 3.1 Gen 2两兄弟华丽登场时，你最想做的事情就会是把USB-IF里负责起名字的人的脑袋给按进显示器。所谓USB 3.1 Gen 1就是原来的USB 3.0，真正的新标准是这个叫USB 3.1 Gen 2的东西。至于传输速率的那个英文名，尽管USB-IF很喜欢，我们还是选择无视比较好。

单纯从纸面数据上看，USB 3.1 Gen 2标准把理论传输速率给翻了一倍赶上了第一代Thunderbolt，还在编码位宽从十位提升至百位的同时，把信令开销从原来的20%压低到了3%，可谓是长足进步。但这次下游厂商这次面对接受新标准所带来的成本和兼容性挑战时不干了，于是他们宁肯配合USB组织的命名障眼法“升级”USB 3.1，也不愿花大力气应用新接口。所以现在绝大多数宣称支持“USB 3.1”标准，但不肯说明究竟是Gen 1还是Gen 2的电子产品或是PC配件，实际上骨子里都还是USB 3.0的能力。

你们不说差点以为USB Type-C = USB 3.1因为要适应不同的设备种类，在USB Type-C出现前，光从接口形态上来区分，USB 2.0标准的接口就有USB Type-A，USB Type-B，miniUSB Type-B、microUSB Type-A以及microUSB Type-B五种（已经被淘汰的不计在内），而在USB 3.0时代还新出现了USB 3.0 Type-A、USB 3.0 Type-B和microUSB 3.0 Type-B。我们在日常生活中最常接触到的便是USB Type-A、USB 3.0 Type-A和microUSB Type-B。因为有颜色和形状的双重区分，人们还是能较容易地辨明接口的用途和速度。

但在2014年，USB IF发布了USB Type-C的1.0版定义，这个接口不仅仅是定义了一个不会插反的新接口形态，它24个的触点数目远超出现行USB标准定义的4个或9个，所以即便USB Type-C可以通过转接的形式兼容旧标准，但它并不是一个以适应现行USB标准为目的的接口，这个接口是为未来而准备的。由于USB Type-C几乎是和USB 3.1前脚跟着后脚出现的，再加上以前压根没人关心自己每天插来插去的USB接口是什么Type，结果不少人瞬间迷失，把二者混为一谈。

不过实际情况是USB 3.1 Gen 2只是一个传输标准，USB Type-C于它而言则只是一个合适的物理载体。USB Type-C也可以承载USB 2.0和USB 3.1 Gen 1协议，现在越来越多使用USB Type-C作为接口的智能手机就是很好的例子。但USB Type-C能干的事情远不止以10Gbit/s的高速传输小电影：支持USB PD 2.0的USB Type-C能以20V/5A(100W)的大功率给笔记本这样的大户供电；而支持DP附加模式的USB Type-C可以外接兼容该模式的显示器；Intel甚至在第三代Thunderbolt标准的定义上选择与USB Type-C共用接口。

三句话理清USB标准乱象现在可以用简单的几句话为全文作出总结：

1、USB 3.0接口通常为蓝色，一定会有5个以上的触点，而USB 2.0接口的触点不会超过5个；

2、USB 3.1 Gen1就是USB 3.0换了个马甲；

3、不要见到USB Type-C就以为它会更快，速度请认准USB 3.1 Gen2。

虽然USB最终的前进方向必定是往着USB Type-C/USB 3.1 Gen2走的，但一个新标准新接口的普及总会花上至少好几年的时间，将来我们必定会面对新老标准共存的混乱场面，先打好预防针，接下来几年内接触带USB接口设备时便可心中有数，拒绝被坑了。