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Installing Peripherals
8.6
USB PORTS
USB is becoming the new essential peripheral interface. The USB strengths are as follows:
the ability to daisy chain as many as 127 devices, a 12Mbps transfer rate, and the
standardization of peripheral interfaces into a single format.
USB support Plug and Play and hot swapping operations (OS level) which is the most user
friendly feature, since this means that the system will support a new USB device
installation without rebooting.
Because of the very low technology barrier, keyboards, mice, speakers, are some of the
first peripherals to adopt the USB standard. Sophisticated USB products, like camera,
scanners, and printers are becoming available. Monitors are likely to become the main hub
for system USB connections.
Connections
The onboard USB capacities are built around the PIIX3 chipset from Intel. Two USB
ports are available. Connections are available through J14 - Dual USB header.
External USB connections must be provided as follows:
1
2
U S B 1
3
4
1
2
U S B 2
3
4
D u a l U S B B ra c ke t - 1 50 -3 1 6
U S B 1
S IG N A L
1
V C C
2
P 0 -
3
P 0 +
4
G ro u n d
S H E LL
G ro u n d
U S B 2
S IG N A L
1
V C C
2
P 1 -
3
P 1 +
4
G ro u n d
S H E LL
G ro u n d
8-9
U S B H e ad e r
1
2
10
9
U S B H e ad e r
1
3
5
7
9
U S B H e ad e r
2
4
6
8
1 0
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