Universal Serial Bus Interface - HP dx7300 Technical Reference Manual

Input/Output Interfaces

5.7 Universal Serial Bus Interface

The Universal Serial Bus (USB) interface provides asynchronous/isochronous data transfers with
compatible peripherals such as keyboards, printers, or modems. This high-speed interface
supports hot-plugging of compatible devices, making possible system configuration changes
without powering down or even rebooting systems.
These systems provide eight USB ports, two front panel USB ports (which may be disabled) and
six USB ports on the rear panel. The USB ports are dynamically configured to either a USB 1.1
controller or the USB 2.0 controller depending on the capability of the peripheral device. The
1.1 controllers provide a maximum transfer rate of 12 Mb/s while the 2.0 controller provides a
maximum transfer rate of 480 Mb/s. Table 5-17 shows the mapping of the USB ports.
USB
ICH8
Controller
USB 1.1 #1,
USB 2.0 #1
USB 1.1 #2
USB 2.0 #1
USB 1.1 #3
USB 2.0 #1
USB 1.1 #4
USB 2.0 #2
USB 1.1 #5
USB 2.0 #2
5-22
ICH8 USB Port Mapping
Signals USDT, SFF, ST Form Factors
Data 0P, 0N Rear panel quad USB stack
Data 1P, 1N Rear panel quad USB stack
Data 2P, 2N Rear panel dual USB with RJ-45
Data 3P, 3N Rear panel dual USB with RJ-45
Data 4-5P/N
Data 6P, 6N Rear panel quad USB stack
Data 7P, 7N Rear panel quad USB stack
Data 8P, 8N
Data 9P, 9N
Table 5-17.
USB Connector Location
Not used
Front panel USB
Front panel USB
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MT & CMT Form Factors
Rear panel quad USB stack
Rear panel quad USB stack
Rear panel quad USB stack
Rear panel quad USB stack
Not used
Rear panel dual USB with RJ-45
Rear panel dual USB with RJ-45
Front panel USB
Front panel USB
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