How fast tracks ExpressCard to USB?
Over the next six months, we can see the adapter card USB ExpressCard and peripherals such as the jump of the publication. What a powerful USB 3.0 interface, on what basis? What reason worth buying? We take you to see through USB 3.0 connection.
November 18, 2008 is intended to charge the history of computing. On this day, Intel, Microsoft, Hewlett-Packard, Texas Instruments, NEC, ST-NXP industry titans such as the composition of the USB 3.0 Promoter Group announced that the organization responsible for developing a new generation of USB 3.0 standard has been formally completed and publicly disclosed. The new specification provides ten times the transfer speed of USB 2.0 and greater efficiency can be widely used in PC peripherals and consumer electronics.
Since the beginning of the USB 2.0 specification, USB 2.0 IEEE1394 industry and the debate over who is faster and there downtime.With low cost and support throughout the industry, ExpressCard Adapter peripheral USB is not transient, in fact, the only standard, IEEE1394 progressively marginalized, and now only active in the field of digital video. On the surface, USB 2.0 transfer rate of 480Mbps to be slightly higher than the 400Mbps transfer rate IEEE1394a, however, the cost of removing a variety of transmission, the actual use of the specification of transfer of high-speed USB 2.0 and even harder to break 50 MB / s. This means that the copy of a Blu-ray, you need more than 10 minutes. 50 MB / s transfer rate lower than the peak, but also greatly limits the high-speed flash memory, high-speed performance of the hard disk to play.
The arrival of USB 3.0, you first have to solve is the transfer rate. Catching up after the specifications before IEEE1394b intercept speed eSATA 3Gb / s, USB 3.0 has a great need to provide a performance advantage to consolidate the position of king of peripheral interfaces.To this end, the Alliance chose this rate USB 5Gbps incredible transfer.Such speed not only directly kills the IEEE1394 interface, monitoring of the specifications, but upgrading to 6Gbps eSATA is not much better.
Generated USB 2.0, USB to all organizations of the standard USB 2.0 speed. USB 3.0 is no exception. This remains the speed of USB 1.1 products are known for 11Mbps USB Full Speed USB 2.0 specifications and the transfer rate of 480 Mbps ExpressCard product is called the high-speed USB, while USB 3.0 SuperSpeed specification defines as 5Gbps . As the USB still has the fine tradition of backward compatibility, so between the three specifications of the computer is common, and have even been marked as USB 3.0 products, the transfer rate between them through Full Speed / High Speed / Super Speed distinguishing suffix.
Since all USB devices to achieve compatibility, which naturally can not have too much USB interface changes. The new USB 3.0 interface and the physical characteristics of cable is downward compatible. Of course, if the computer interfaces, and no cable is not compatible with USB 3.0, Superspeed not be achieved ultra-high speed, but at least USB 3.0 cable connected to a 2.0 interface can be sure that no explode. The key is compatible with USB 3.0 interface design.
USB 2.0, a total of four lines, two of which correspond to the data input and output, the other two are power and ground. USB 3.0 On this basis, an increase of five contacts, new contacts from side to side in the four rear USB 2.0 contacts. In other words, from the connector USB ExpressCard Adapter where you can see the difference between 3.0 and 2.0 cables. To follow all the evidence, USB 3.0 interfaces were marked in blue and black USB 2.0, USB 1.0 interface, the blank line.
