Universal Serial Bus (English: Universal Serial Bus, abbreviation: USB) is to connect the computer system and peripheral equipment of a Serial Bus standard, is also a kind of input/output interface specification, is widely used in personal computers and mobile devices, such as information and communication products, and expand to photographic equipment, digital TV (STB), game consoles and other related fields.The latest generation is USB 3.1, the transmission speed of 10 gbit/s, higher voltage 5 v / 12 v / 20 v, maximum power 100 w, the new Type C Type points and no longer.
USB is an external bus standard for specification computer connections and communications with external devices.USB plug and play and hot plug function.USB interface can connect 127 types of peripherals, such as a mouse and keyboard, etc.USB is at the end of 1994 by Intel and other companies jointly launched in 1996, has been successfully replace serial and parallel ports, has become today's computer and a lot of smart devices will match interface.USB version has experienced years of development, now has developed into version 3.0.[2] for most engineers, development of USB2.0 interface products main obstacle lies in: to face the complex USB protocol, write your own USB device driver, familiar with MCU programming.This not only requires considerable VC programming experience, can also write USB hardware (firmware) program.So most people give up their development of USB products.To the complex problem simplification, xi 'an datai electronic special USB2.0 protocol conversion module is designed.USB20D module can be seen as a USB2.0 protocol converter, convert computer usb interface to a transparent parallel bus, just like microcontroller bus.To within a few days can complete the usb products design.
USB device mainly has the following advantages:
1. Can be hot plug.Is a user in the use of an external device, don't need to turn it off again on such action, but in computer work, directly to the USB plug in use.
2. Easy to carry.USB device with "small, light, thin" mostly, for users, carry a large amount of data, is very convenient.Of course the USB hard drive is the primary choice.
3. The unified standard.Everyone's common IDE hard disk, mouse and keyboard of the serial port, parallel printers, scanners, but after a USB, all these application peripherals connected to the PC can use the same standards, then there will be a USB hard drive, USB mouse, USB printer etc.
4. Can connect to multiple devices.On personal computers often have multiple USB interface, can be connected to several devices at the same time, if there are four USB ports connected to a HUB, can again connected;Four USB devices, and so on, can even go down, will your equipment at the same time, even on a personal computer and there is no problem (note: the highest can be connected to 127 devices).
1. Can be hot plug.Is a user in the use of an external device, don't need to turn it off again on such action, but in computer work, directly to the USB plug in use.
2. Easy to carry.USB device with "small, light, thin" mostly, for users, carry a large amount of data, is very convenient.Of course the USB hard drive is the primary choice.
3. The unified standard.Everyone's common IDE hard disk, mouse and keyboard of the serial port, parallel printers, scanners, but after a USB, all these application peripherals connected to the PC can use the same standards, then there will be a USB hard drive, USB mouse, USB printer etc.
4. Can connect to multiple devices.On personal computers often have multiple USB interface, can be connected to several devices at the same time, if there are four USB ports connected to a HUB, can again connected;Four USB devices, and so on, can even go down, will your equipment at the same time, even on a personal computer and there is no problem (note: the highest can be connected to 127 devices).
With the passage of time, all kinds of USB to appear on the market. Some cartoon style, fashionable style. By the vast number of consumers love . As is known to all , USB is very small ,and easy lose and get damaged , so USB box appeared on the market, these packaging can make the USB more safety , but also durable. Do you have package box for your USB ?
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