IBM 847671U Hardware Maintenance Manual - Page 166

Universal serial bus ports, Table 10. USB Port Connector Pin-Number Assignments

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Universal serial bus ports: The universal serial bus (USB) is an emerging serial interface standard for telephony and multimedia devices. Each USB port is a single connector for devices that previously used serial, parallel, keyboard, mouse, and game ports. USB technology uses Plug and Play to determine which type of device has been attached to the connector. Each USB device is accessed by a unique USB address. A device called a hub is used to convert a single USB connector into multiple attachment points. A hub has multiple ports where peripherals can be attached. USB provides 12 megabits-per-second (Mbps) bandwidth with a maximum of 63 peripherals and a maximum signal distance of five meters per segment. Note If more than one USB device is to be attached, the device must be connected to a hub. The Netfinity 3000 server does not support a keyboard attached to the system USB port. The Netfinity 3000 server comes with two USB ports. Table 10 shows the pin-number assignments for the USB port connectors. Pin Signal 1 VCC 2 −Data 3 +Data 4 Ground Table 10. USB Port Connector Pin-Number Assignments 158 Netfinity Server HMM

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Universal serial bus ports:
The universal serial
bus (USB) is an emerging serial interface standard for
telephony and multimedia devices.
Each USB port is a
single connector for devices that previously used serial,
parallel, keyboard, mouse, and game ports.
USB
technology uses Plug and Play to determine which type of
device has been attached to the connector.
Each USB
device is accessed by a unique USB address.
A device
called a hub is used to convert a single USB connector
into multiple attachment points.
A hub has multiple ports
where peripherals can be attached.
USB provides 12
megabits-per-second (Mbps) bandwidth with a maximum of
63 peripherals and a maximum signal distance of five
meters per segment.
Note
If more than one USB device is to be attached, the
device must be connected to a hub.
The Netfinity
3000 server does not support a keyboard attached to
the system USB port.
The Netfinity 3000 server comes with two USB ports.
Table
10 shows the pin-number assignments for the USB
port connectors.
Table 10. USB Port Connector Pin-Number Assignments
Pin
Signal
1
VCC
2
-
Data
3
+
Data
4
Ground
158
Netfinity Server HMM