USB 3.0

USB 3 is the most recent USB specification, the specification by the big company such as Intel launched. USB 2 already obtained the PC manufacturers generally recognized, the interface became more hardware manufacturer interface must have a look, home of common motherboard clear. USB2.0 maximum transmission rate of 480Mbps, 60MB / s. However, we should pay attention to the theory of the transmission value, if several devices that share a single USB channel, the main control chip to each device may control the bandwidth allocation, control. As in USB1.1, all devices can share 1.5MB / s bandwidth. If a single USB interface bandwidth occupied by the equipment of all words, will give the use of other equipment difficult.

Brief introduction

USB 3 -- is also known as the SuperSpeed USB -- for those with PC or audio frequency apparatus is connected to a device that provides a standard interface. From the keyboard to the high throughput of the disk drive, a device is capable of using this low cost interface for the smooth running of the plug-and-play connection, users do not have to spend too much time on it. The new USB 3 while maintaining compatibility with USB 2 at the same time, also provides the following a few enhancements:

Greatly improve the bandwidth -- high amounts to 5Gbps duplex ( USB2.0, 480Mbps half duplex )

To achieve better power management

Enables the host to device provides more power, thus realizing the USB rechargeable batteries, LED lighting and mini fan and other applications.

Enables the host faster recognition device

The new agreement allows the data processing more efficient

USB 3 can be stored in the device of the limited storage rate transmission of large capacity file ( such as HD film ). For example, using a USB 3 flash drives can be in 3.3 seconds the 1GB data is transferred to a host computer, and USB 2 to 33 seconds.

Consumer electronic devices by increasing resolution and storage performance demand, hope that through a broadband Internet connection to achieve wider media application, therefore, the user needs more rapid transmission performance, in order to simplify the download, storage as well as for the multimedia large content sharing. USB 3 in order to provide consumers with its required simple connectivity plays a crucial role in.

When used in consumer devices, USB 3 will solve the USB 2 cannot identify the battery device issues. The host through USB 3 slowly reducing the current, thereby identifying the devices, such as mobile phone battery has been broken.

The system and ASIC developers, USB 3 chip and IP wide practicability in ensuring that each design requirements can be timely to satisfy. This comprehensive support for such as USB 3 standard is especially important, because the speed, high agreement and various cable length (from a few inches to several meters ) makes the design and standard compatibility becomes a challenge.