Introduction to USB
History and Evolution
Current USB Speeds and Limitations
Spec | Data Rate and | Applications | Notes |
| Performance |
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|
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|
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 / | 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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|
