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.

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

 

 

Table 5-7.

 

 

ICH10 USB Port Mapping

 

 

 

ICH10

 

 

Controller

Signals

USB Connector Location (all form factors

 

 

 

USB 1.1 #1,

Data 0P, 0N

System board header P151

USB 2.0 #1

 

 

Data 1P, 1N

not connected

 

 

 

 

USB 1.1 #2

Data 2P, 2N

System board header P150

USB 2.0 #1

 

 

Data 3P, 3N

System board header P150

 

 

 

 

USB 1.1 #3

Data 4P, 4N

Front panel USB

USB 2.0 #1

 

 

Data 5P, 5N

Front panel USB

 

 

 

 

USB 1.1 #4

Data 6P, 6N

Rear panel USB

USB 2.0 #2

 

 

Data 7P, 7N

Rear panel USB

 

 

 

 

USB 1.1 #5

Data 8P, 8N

Rear panel USB

USB 2.0 #2

 

 

Data 9P, 9N

Rear panel USB

 

 

 

 

USB 1.1 #6

Data 10P, 10N

Rear panel USB

USB 2.0 #2

 

 

Data 11P, 11N

Rear panel USB

 

 

 

 

5.7.1 USB Connector

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

1

2

3

4

Figure 5-8. Universal Serial Bus Connector (as viewed from rear of chassis)

 

Technical Reference Guide

www.hp.com

5-11

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Image 63
HP dc7900 manual Universal Serial Bus Interface, USB Connector, ICH10 USB Port Mapping

dc7900 specifications

The HP dc7900 is a well-regarded desktop solution that serves as a testament to HP's commitment to performance, reliability, and user accessibility. Introduced as part of HP’s Compaq line and designed primarily for business professionals, the dc7900 combines powerful processing capabilities with a compact form factor that suits various office environments.

One of the standout features of the HP dc7900 is its robust configuration options. It typically comes equipped with Intel's Core 2 Duo or Quad processors, giving users the ability to handle demanding applications seamlessly. The inclusion of Intel's technologies, such as Intel vPro, enhances remote management and IT control, making it an ideal choice for businesses looking to streamline their operations.

The dc7900 is designed with flexibility in mind. It offers multiple form factors, including mini-tower, small form factor, and ultra-slim desktop configurations. This variety enables organizations to choose a model that best fits their workspace requirements, maximizing both efficiency and aesthetics. The small footprint models are particularly beneficial in space-constrained environments, while the mini-tower version provides expandability for future upgrades.

In terms of graphics capabilities, the HP dc7900 typically features integrated Intel graphics, with options to install discrete graphics cards for users who require enhanced visual performance. This makes the dc7900 suitable for tasks ranging from standard office applications to more graphics-intensive responsibilities.

Connectivity is another key characteristic of the HP dc7900. It is equipped with a variety of ports, including USB 2.0 and audio jacks, allowing users to connect peripherals easily. Additionally, the dc7900 supports legacy connections, making it easier for businesses with older equipment to integrate new systems without hassle.

Durability and reliability are hallmarks of the HP dc7900. Built with high-quality materials and subjected to rigorous testing, this desktop is designed to withstand the demands of a bustling office environment. Furthermore, HP's comprehensive warranty and support options assure businesses of the reliability of their investment.

The HP dc7900 is not just a powerful desktop; it’s a versatile and dependable solution for modern businesses. With its combination of performance, expandability, and solid build quality, the dc7900 remains a relevant choice for those looking to enhance their productivity and efficiency in the workplace.