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Technical Reference Guide www.hp.com 5-9
Input/Output Interfaces
5.6 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 ten externally-accessible USB ports; four front panel USB ports (which
may be disabled) and six USB ports on the rear panel. These systems include an internal header
connections for USB option modules. The USB 2.0 controller provides a maximum transfer rate
of 480 Mb/s. Table 5-5 shows the mapping of the USB ports.
USB
NOTE: Actual mapping between each USB port pair and a particular header or external panel
connector can be random. USDT form factors support only two USB ports internally.
Table 5-5.
PCH USB Port Mapping
USB Signals USB Connector Location (see note below)
Data 0P, 0N System board header
Data 1P, 1N System board header
Data 2P, 2N System board header
Data 3P, 3N System board header
Data 4P, 4N Front panel
Data 5P, 5N Front panel
Data 6P, 6N Front panel
Data 7P, 7N Front panel
Data 8P, 8N Rear panel
Data 9P, 9N Rear panel
Data 10P, 10N Rear panel
Data 11P, 11N Rear panel
Data 12P, 12N Rear panel
Data 13P, 13N Rear panel