Introduction to USB

History and Evolution

Current USB Speeds and Limitations

Spec

Data Rate and

Applications

Notes

 

Performance

 

 

 

 

 

 

USB 1.1 Low-

1.5 Mbps / 10-

Keyboard,

Low cost but limited

speed

100 Kbps

mouse, joystick

TM

performance; type

USB 2.0 Low-

 

 

and number of

speed

 

 

endpoints are limited

 

 

 

 

 

 

 

USB 1.1 Full-

12 Mbps / 5-10

Printers, audio

Moderate

speed

Mbps

devices, floppy

performance;

USB 2.0 Full-

 

drives

guaranteed latency;

 

 

guaranteed

speed

 

 

USB 2.0 High-

480 Mbps / 25-

Video, storage,

bandwidth

Vast bandwidth

speed

400 Mbps

imaging

improvements

 

 

 

 

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Freescale Semiconductor TWR-MCF52259-Ethenet manual History and Evolution