Input/Output Interfaces

5.6Universal 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

 

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

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.

Technical Reference Guide

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5-9