A few years ago, USB cable shipments had reached more than 10 billion units worldwide, and the author visited the current stationery and lifestyle stores. The USB hub has been designed to look like an ordinary power extension cord, or The general power extension socket has a USB socket, which indicates the popularity of USB.
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The USB3.1 version and C-type connector proposed will make the usability of USB re-expanded, and even squeeze the value of other external interfaces, living space. First of all, USB 3.1 will increase the speed from 3.0 to 10Gbps at 3.0Gbps, which will threaten Intel Thunderbolt. The Thunderbolt (TBT) cable has two channels, each with a rate of 10Gbps. In the original configuration, one channel is reserved for DisplayPort ( DP), I/O uses the bandwidth of another channel, namely Display is 10Gbps, I/O is 10Gbps.
In April last year, Thunderbolt cancelled the reserved bandwidth of DP. Two channels can be used for I/O transmission at the same time. Intel claimed to double the TBT rate and renamed it TBT2. However, it still needs to consider Display needs. If a FullHD video transmission is included, deduct 3.7. At Gbps, the actual I/O throughput is about 16 Gbps. USB3.1's 10Gbps can transmit 2 sets of FullHD video, and can also transmit 1 set of 4KUHD video with 30 frames per second, but it cannot reach 60 frames per second, but 10Gbps is enough to pressure TBT.
Another threat is HDMI, although HDMI 2.0 upgrade to 18Gbps, can support 4KUHD transmission, but USB3.1 specially added AV audio video transmission mode, than in the past can better support timely video transmission, in the past, although USB supports timely video transmission, However, audio-based (taking into account the limited transmission rate, only supports speakers, microphones and other applications), the smaller the amount of transmission, adding new models, even HDMI also feel the living space is squeezed.
More importantly, USB 3.1 adopts a better code (128b/132b). The overhead of simple communication and coordination mechanisms reduces overhead. In the past, TBT can still mock USB with high consumption, and real-value data transmission capacity. Lower, and now it is difficult to attack again.
In addition to the speed increase, USB 3.1 also joins the C-type connector. The C-type connector greatly reduces the physical appearance, and is more suitable for short and thin handheld devices. The C-type will replace the Micro-AB connector (USB support The device directly communicates without the intervention of the main control system. It will also replace the general Micro-USB connector. The C-type connector will mimic the Apple Lightning connector. Both positive and negative can be used normally. It is more ideal than the existing Micro-USB. Although Micro-USB has a fool-proof mechanism to prevent reverse connection, the advantages of both positive and negative connections are better than the prevention of reverse connection. Wiring can be completed smoothly.
More powerful power supply
USB3.1 still has a strong emphasis on power supply. Past USB1.0/1.1/2.0 adopts 5V and 100mA/500mA power supply design, which has allowed many end users to experience the convenience of combining data lines and power lines. Simple week Side devices (such as cameras, mice, etc.) do not require additional transformers to operate.
In USB3.0, the current is increased to 900mA to make the application more convenient, and USB3.1 is once again strengthened, increasing the current to 1.5A, 2A, 3A, 5A, etc., and the voltage is no longer sticking to 5V. 12V, 20V and other higher voltages.
In this way, the USB power supply can increase from 4.5W at 5V and 900mA to 10W, 18W, 36W, and 60W, or even 100W at most, making it possible for more devices without additional transformers (power adapters). Operation, such as scanners, printers, even shipyards, laptops, etc.
As more and more electronic products are powered by USB cables, it means that different types of power outlets in different countries have different power supply voltages and frequencies. It is increasingly unnecessary, as different countries used different televisions in the past. Standards, American regulations NTSC, European PAL, Russian SECAM, etc., are for the future battle between the two countries, the country still holds its own right to broadcast propaganda.
However, with the development of globalization, the differences between countries are disappearing. The processors are sold worldwide and the USB cables are also the same. The existing telecommunications industry is mostly licensed by various countries (as well as national security considerations) and will gradually disappear. In the past, the United States would ban the export of high-end servers to potential belligerents, or limit the output specifications, performance, or prohibit the export of higher-order encryption evolution software, etc., all of which were also lifted, and USB3.1's new power supply standards, Estimates will become common specifications for future DC electronic products, leaving only large white appliances to still follow current power supply designs across countries. 
