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The meanings of different colored USB interfaces
USB introduction
USB is the abbreviation of Universal Serial Bus, that is, Universal Serial Bus. It is a standard interface used to connect computers and external devices. It can be used to connect various devices, such as mice, keyboards, printers, cameras, storage devices, etc.
There are multiple versions of USB interfaces, including USB 1.0, USB 1.1, USB 2.0, USB 3.0, USB 3.1, etc. Among them, USB 1.0 and USB 1.1 are relatively slow, with a maximum transfer rate of only 12 Mbps, while the speed of USB 2.0 can reach 480 Mbps, the speed of USB 3.0 can reach 5 Gbps, and USB 3.1 further improves the transfer rate.
USB interface includes three types: A, B, and C. Among them, type A interface is used to connect to the computer host, type B interface is used to connect external devices, such as printers, scanners, etc., and type C interface is a brand-new interface type that can support two-way power supply and data transmission. Future Trends.
In real life, when we carefully observe electronic devices such as mobile phones, TVs, computers, speakers, etc., we will find that USB ports come in many colors. You may think that it is just for good looks, but in fact different colors represent different performances.
The concept of USB interface
USB Universal Serial Bus (Universal Serial Bus) is a serial port bus standard and a technical specification for input and output interfaces. After being jointly launched by Intel and other companies in 1996 at the end of 1994, it has successfully replaced serial ports and parallel ports. It has become a necessary interface for today's computers and a large number of smart devices. USB is an external bus standard that regulates the connection and communication between computers and external devices. It has a hot-swappable function and can connect a variety of peripherals. It is widely used in information and communication products such as personal computers and mobile devices, and has been extended to photographic equipment. , digital TV (set-top box), game consoles and other related fields.
Advantages of USB interface
USB devices mainly have the following advantages:
(1) It can be hot-swapped, which means that when using an external device, the user does not need to shut down and then turn it on again, but can directly plug in the USB when the computer is working;
(2) Easy to carry. Most USB devices are known for being "small, light, and thin." It is very convenient for users to carry a large amount of data with them;
(3) The standard is unified, and the USB interface can connect application peripherals to a personal computer, such as USB hard disk, USB mouse, USB printer, etc.;
(4) Multiple devices can be connected. USB often has multiple interfaces on personal computers and can connect multiple devices at the same time, which is very convenient.
The meanings of different colored USB interfaces
The meanings of different colored USB interfaces are as follows:
Black/White: It belongs to the USB1.0/2.0 era and is the most traditional speed. Theoretically, the speed is slow, only about 60MB/s, and the charging speed is also very slow;
Yellow: USB2.0 interface, the transmission speed is limited, but it can support the charging function after shutdown;
Dark blue: It belongs to the USB3.0 era. The theoretical maximum speed is 640MB/s, which is much faster than the previous generation;
Light blue: It belongs to the USB3.1 era, and the theoretical maximum transfer speed is 1280MB/s;
Green: represents support for Qualcomm QC fast charging technology, which is not a very common interface;
Red: USB3.1 interface, the transmission speed has increased significantly, still 1280MB/s, and can support charging after shutdown;
Orange: Still supports shutdown charging, and is also a fast charging interface of some brands, which is not very common;
Purple: USB3.1 interface, which is Huawei’s exclusive fast charging interface, and the speed can still reach 1280MB/s.
Summarize
In short, the colors of USB interfaces represent different transmission speeds, powers and device types. In daily life, we only need to remember the ones we commonly use to complete our needs. Do not mix interfaces with different specifications to avoid causing inconsistencies. necessary losses.