HP DC71XX, DX61XX 5.7Universal Serial Bus Interface

Input/Output Interfaces

5.7Universal 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.

As shown in Figure 5-8, the USB interface is provided by the 82801 component. All systems provide as total of eight USB ports, two USB ports accessible at the front of the unit 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.

USB 1.1 Cntlr. #1

USB 1.1 Cntlr. #2

USB 1.1 Cntlr. #3

USB 1.1 Cntlr. #4

USB 2.0

Cntlr.

82801 ICH6

1.10

1.11

1.1 2

1.13

1.14 1.1 5

1.16

1.17

2.00

2.0 1

2.0 2

2.0 3

2.04

2.05

2.06

2.0 7

Rear Panel

Data 0
	USB Port 1
Data 1
	USB Port 2
Data 2
	USB Port 3
Data 3
	USB Port 4
Data 4
Data 5	USB Port 5
	USB Port 6
Data 6	Front Panel
Data 7	USB Port 7
	USB Port 8

Figure 5-8. USB I/F, Block Diagram

Technical Reference Guide 361834-002 5-25