Qian XIAO PC Manual De Usuario página 61

Released
Speed
Signaling Method
Price
Power Usage
Number of wires
within the cable
Standard-A
Connectors
Standard-B
Connectors
Max Cable length
USB 2.0
April 2000
High Speed or HS,
480 Mbps (Megabits
per second)
Polling mechanism
i.e can either send
or receive data (Half
duplex)
For a similar product,
the USB 2.0 version
is generally less
expensive than it's
USB 3.0 version.
Up to 500 mA
4
Grey in color
Smaller in size
5 meters
USB 3.0
November 2008
10 times faster than
USB 2.0. Super
Speed or SS, 4.8
Gbps (Giga bits per
second)
Asynchronous
mechanism i.e. can
send and receive data
simultaneously (Full
duplex)
For a similar product,
the USB 3.0 version
is generally more
expensive than it's
USB 2.0 version.
Up to 900 mA. Allows
better power efficiency
with less power for
idle states. Can power
more devices from
one hub.
9
Blue in color
Extra space for more
wires
3 meters
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