
Chapter 2. System Board Features
USB Interface
Universal serial bus (USB) technology is a standard feature of the computer. Using the chipset, the
system board provides the USB interface with two connectors. A USB-enabled device can attach to each
connector, and if that device is a hub, multiple peripherals can attach to the hub and be used by the
system. The USB connectors use Plug and Play technology for installed devices. The speed of the USB
is up to 12 Mb/s with a maximum of 127 peripherals.
Features provided by USB technology include:
Hot pluggable
Support for concurrent operation of multiple devices
Suitable for different device bandwidths
Up to five meters length from host to hub or hub to hub
Guaranteed bandwidth and low latencies appropriate for specific devices
Wide range of packet sizes
Limited power to hubs
For information on the connector pin assignments for the USB interface, see “USB Connectors” on
page 35.
Chapter 2. System Board Features
7
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