USB 3.0 Host Controller
  USB 3.1 Hub Controller
  USB 3.0 Device
  USB 3.1 Type-C Controller
  F-One Aggregation
  Superspeed USB Technology
  > xHCI
  > USB 3.0
 
Home > Products > Superspeed USB Technology
USB 3.0

Universal Serial Bus (USB)

USB is the most successful interconnect interface of pass decade on personal computer (PC) and consumer electronics (CE) market. Two major key considerations are:
(1) Ease-of-use: USB provides a user-friendly and low-cost interfaces and plug-n-play hardware/software mechanism. Powered connector even gives more convenience to user experiences.
(2) Port Expansion: USB defined external expansion bus architecture which makes adding peripherals to a PC is as easy as hooking up a telephone to a wall-jack. More, expandable thought hubs fulfill the need of increasing peripheral connections.

The USB 1.0 specification was first introduced in 1996 and had a data transfer rate of 1.5Mbps and 12Mbps. The USB 1.1 was released in 1998, which fixed problems identified in USB 1.0. The USB 1.1 is the earliest revision to be widely adopted.

The USB 2.0 specification was released in 2000. The USB 2.0 provides 480Mbps data rate, which is 40 times bandwidth compare to USB 1.1 and is backward compatible to USB 1.1 with the same cable, connectors and software interfaces.

USB 3.0 -- SuperSpeed

As the technology innovation move forward, new media formats, fancy applications and more affordable storage are requiring significant bandwidth to maintain the user experiences when moving or editing these super size data.

USB Rev.

Data Rate

Music, Photo (4MB)

USB Flash (256MB)

USB Flash (1GB)

DVD-Movie (6GB)

USB Flash (16GB)

HD-Movie (25GB)

USB 1.0

12Mbps

5.3 sec

5.7 min

22 min

2.2 hr

5.9 hr

9.3 hr

USB 2.0

480Mbps

0.1 sec

8.5 sec

33 sec

3.3 min

8.9 min

13.9 min

USB 3.0

5000Mbps

0.01 sec

0.8 sec

3.3 sec

20 sec

53.3 sec

70 sec

The USB 3.0 specification has 5Gbps transfer rate which is 10 times performance increase over USB 2.0 while maintaining the backward compatibility. Legacy devices (USB 2.0/1.1) continue to work with new USB 3.0 host and new USB 3.0 device works at USB 2.0 speed while plugged into USB 2.0 hosts.

USB 3.0 vs USB 2.0

Features

USB3.0

USB2.0

Data Rate

SuperSpeed (5.0Gbps)

Low-Speed (1.5Mbps)

Full-Speed (12Mbps)

High-Speed (480Mbps)

Data Signal

SuperSpeed TX Diff. Signal: SSTX+-

SuperSpeed RX Diff. Signal: SSRX+-

Differential Signal: D+/D-

Connector Signals

4 wires: SuperSpeed

2 wires: DP/DM for USB 2.0

3 wires: Vbus/GNDx2

2 wires: DP/DM for USB 2.0

2 wires: Vbus/GND

Bus Protocol

Explicit Routing

Host Broadcast

Power Control

Configuration at multiple link levels

Suspend/Resume by Port

Power Supply to Bus

5V, 900 mA

5V, 500 mA

USB 3.0 Signals

Signals

Description

Comment

VBus

Bus Power

5V, 900mA

D-

USB 2.0 differential pair

USB 2.0 backward compatibility

D+

USB 2.0 differential pair

USB 2.0 backward compatibility

GND

Ground

 

Download :
 
 
 
 
 
 
  HOME | ABOUT US | NEWS | PRODUCTS | SUPPORT | PARTNERS | CAREERS | CONTACT US | SITEMAP | VIDEO