HP kp721av Manuale Utente

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 externally-accessible USB ports, two front panel USB ports (which 
may be disabled) and six USB ports on the rear panel. In addition, the SFF and CMT form factors 
support a media reader accessory that uses two USB ports through a system board connection. 
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 5-7 shows the mapping of the USB ports.

USB

These systems provide type-A USB ports as shown in Figure 5-7.

USB 1.1 #1,
USB 2.0 #1

Data 0P, 0N

System board header P151

Data 1P, 1N

not connected

USB 1.1 #2
USB 2.0 #1

Data 2P, 2N

System board header P150

Data 3P, 3N

System board header P150

USB 1.1 #3
USB 2.0 #1

Data 4P, 4N

Front panel USB

Data 5P, 5N

Front panel USB

USB 1.1 #4
USB 2.0 #2

Data 6P, 6N

Rear panel USB

Data 7P, 7N

Rear panel USB

USB 1.1 #5
USB 2.0 #2

Data 8P, 8N

Rear panel USB

Data 9P, 9N

Rear panel USB

USB 1.1 #6
USB 2.0 #2

Data 10P, 10N

Rear panel USB

Data 11P, 11N

Rear panel USB

 

1

2

3

4