科瑞欧USB接口外文翻译文献
(文档含中英文对照即英文原文和中文翻译)
原文：
USB
USB is the English acronym for Universal Serial BUS, Chine meaning is "Universal Serial Bus." It is not a new bus standard, but in the PC field of application interface technology. USB is the end of 1994 by Intel, Compaq, IBM, Microsoft and other companies jointly propod. But until recently, it has been widely ud before. From November 11, 1994 version of USB V0.7 relead later, USB version has gone through years of development, up to now has been developed for the 2.0 version of the current expansion of the standard computer interface. At prent, the main motherboard is USB1.1 and USB2.0, the USB version of the USB plug with a 4-pin plug as standard, the form can
be ud to daisy chain all of the peripherals connect up to 127 can be connected to external equipment, and no loss of bandwidth. USB needs of the host hardware, operating systems and peripherals support the three will work. The current motherboard is generally ud to support the USB f
unction control chipts, motherboards are also equipped with USB interface socket, the socket and back in addition to, the motherboard also has USB pins is rerved, can be received through the connection box USB interface as a front in front of the convenience of the urs (note that in connection to the motherboard manual to read and plans to connect must not be wrong then the damage of equipment). And USB interface can also be connected through a special USB drive to achieve two-plane interconnection line and can be extended through the Hub's interface more. USB has a faster transmission speed (USB1.1 is 12Mbps, USB2.0 is 480Mbps, USB3.0 is 5 Gbps), easy to u, support hot-swappable, connect flexible, independent power supply, etc., you can connect a mou, keyboard, printer , scanners, camera, flash disk, MP3 machines, mobile phones, digital cameras, mobile hard drive, external floppy drive light, USB card, ADSL Modem, Cable Modem, etc., almost all of the external equipment.
USB is an external bus standard for the specification of computer and external device connectivity and communications. USB interface support equipment features plug-and-play and hot-swappable.
USB interface can be ud to connect as many as 127 kinds of peripherals, such as mou, modem and keyboard. USB since the introduction in 1996, has been successfully alternative rial and parallel port, and today a large number of personal computers and intelligent devices will be assigne
d one of the interface.
USB version
The first generation: USB 1.0/1.1 transfer rate for the maximum 12Mbps. Launched in 1996.
The cond generation: USB 2.0 transfer rate up to the maximum 480Mbps. USB 1.0/1.1 and USB 2.0 interfaces are mutually compatible.
躲避英文Third Generation: USB 3.0 maximum transfer rate of 5Gbps, downward compatible with USB 1.0/1.1/2.0
USB applications:
With the rapid development of computer hardware, peripherals, more and more keyboards, mice, modems, printers, scanners already known to all, digital cameras, MP3 players one after another, so much equipment, how to access a personal computer? USB is generated bad on this objective. USB is a computer peripheral device is connected so that the standardization of a single interface, the specifications are from Intel, NEC, Compaq, DEC, IBM, Microsoft, Northern Telecom established contact.
关于说的词语
Standard USB1.1 interface transfer rate of 12Mbps, but a USB device can only get a maximum bandwidth of 6Mbps. Thus if an external drive, can take up to six-speed CD-ROM, can not be high. Standard USB1.1 interface transfer rate of 12Mbps, but a USB device can only get a maximum bandwidth of 6Mbps. Thus if an external drive, can take up to six-speed CD-ROM, can not be high.
A US
B interface can theoretically support 127 devices, but is still unable to achieve this figure. In fact, for a computer, the peripherals around the next few of the more than 10, so this figure is enough for us to u.三国演义精彩片段摘抄
USB also has a significant advantage is that support hot-swappable, meaning that in the ca of the boot, you can safely connect or disconnect USB devices, true plug-and-play.
However, not all of the Windows system support USB. At prent, Windows system, there are many different versions, in the versions, only the above versions of Windows98 system better USB support, while the other version of Windows does not support the integrity of the USB. For example, the retail version of Windows95 does not support USB, and only later bundled with the PC version of Windows95 support USB.
假说演绎法
Windows95 versions in order to support USB.
Although USB devices are currently widely ud, but it is more common USB1.1 interface, it is only the transmission speed of 12Mbps. For example, when you u USB1.1 scanner scan a picture of the size of 40M, the need for as long as 4 minutes. At such a pace, so that urs find it very inconvenient, if there are a few pictures to scan, then you must have very good patience to wait any longer.
Ur demand is the driving force promoting the development of technology, manufacturers are also aware of the bottleneck. At this time, COMPAQ, Hewlett Packard, Intel, Lucent, Microsoft, NEC and the ven manufacturers PHILIPS this jointly developed
the standard USB 2.0 interface. USB 2.0 will transfer data between devices incread the speed of 480Mbps, faster than USB 1.1 standard to about 40 times speed improvement for the urs means that the greatest advantage is that urs can u to more efficient external equipment, and has a wide range of speed peripherals can be connected to the USB 2.0 line, but without worrying about the data transmission bottleneck effect occurred.
So, if you u USB 2.0 scanner, on a totally different picture 40M So just a half a minute or so, on th
e blink of an eye later, the efficiency greatly enhanced. Moreover, USB2.0 can u the original definition of the same specifications USB cable, connector specifications are also identical to the premi that in the high-speed USB 1.1 as to maintain the outstanding characteristics, and,
USB 2.0 devices will not USB 1.X equipment in common u when the event of any conflict.
成熟XXX
USB2.0 compatible with USB1.1, that is to say USB1.1 and USB2.0 devices can be general-purpo equipment, but at this time USB2.0 full-speed device can only work in the state (12Mbit / s).
穿越小说完本USB2.0 high-speed, full-speed and low-speed three speed, high-speed is 480Mbit / s, full speed is 12Mbit / s, low speed is 1.5Mbit / s. Which is a full-speed and low-speed USB1.1 and USB1.0 compatible and designed to buy USB products therefore can not just listen to propaganda merchants USB2.0, but also to figure out is the high-speed, full-speed or low-speed devices. USB bus is a one-way bus, the main controller in the PC machine, USB devices can not initiate communication with the PC. USB device interoperability to solve communication problems, the manufacturers developed the USB OTG standard, allowing embedded system communicate with each other through the USB interface in order to get rid of the PC.
Rename the new USB2.0 specification of the original USB standard USB 1.1 into a USB 2.0 Full Spe
ed (full version), at the same time, the original USB 2.0 into a USB 2.0High-Speed (speed version) and at the same time announced a new logo. It goes without saying that high-speed version of the cour more than the speed of USB 2.0 full-speed version of USB 2.0.
USB vs IEEE1394
小学安全教育内容one, USB and IEEE1394 mainly the same as what? Both are a common external device interface. Both of which can quickly transfer large amounts of data. Can connect two different devices. Both support hot-swapping. Both do not have external power supply.
Second, USB and IEEE1394 What are the differences?
Transfer rate between the two different. USB and IEEE1394 transfer rate up faster than a really pale into insignificance. USB transfer rate is only 480Mbps, can only connect keyboard, mou, and microphone, such as low-speed devices, and IEEE1394 can u 3.2Gbps, can be ud to connect digital cameras, scanners and information appliances that require high-speed devices
Between the two different structures. USB connection to be in at least one computer, and must come to the realization of the need for HUB interconnection, the entire network can connect up to 127 devi
ces. IEEE1394 do not need a computer to control all the equipment, do not need to HUB, IEEE1394 bridge can be ud to connect multiple IEEE1394 network, that is to say in the u of IEEE1394 achieved after 63 IEEE1394 devices can be ud to bridge other IEEE1394 network connection up to unlimited connections.
Intelligent different between the two. IEEE1394 network equipment can increa or decrea in its re-establishment of the network automatically. HUB is USB connected device to determine the increa or decrea. Application of two different levels. Now USB has been widely ud in all aspects of almost every PC motherboard USB interfaces are t up, USB2.0 will further increa the range of USB applications. IEEE1394 is now only applies to audio, video and other multimedia.
USB On-The-Go supplement standard
USB On-The-Go Supplement 1.0:2001 relead in December. USB On-The-Go Supplement 1.0a: 2003 was relead 6 years, that is, the current version.
USB OTG is the USB On-The-Go acronym, is a recent development of technology, December 18, 2001 published by the USB Implementers Forum, mainly ud in a variety of equipment or the connection between mobile devices for data exchange. In particular, PDA, mobile phones, consumer
devices. Changes such as digital cameras, video cameras, printers and other equipment between a number of different standard connectors, as many as ven
