Device

Glossary

A Universal Serial Bus device that provides additional connections to the Universal Serial Bus.

Hubs are a key element in the plug-and-play architecture of USB. The Figure shows a typical hub. Hubs serve to simplify USB connectivity from the user's perspective and provide robustness at low cost and complexity.

Hubs are wiring concentrators and enable the multiple attachment characteristics of USB. Attachment points are referred to as ports. Each hub converts a single attachment point into multiple attachment points. The architecture supports concatenation of multiple hubs.

The upstream port of a hub connects the hub towards the host. Each of the other downstream ports of a hub allows connection to another hub or function. Hubs can detect, attach and detach at each downstream port and enable the distribution of power to downstream devices. Each downstream port can be individually enabled and configured at either full or low speed. The hub isolates low speed ports from full speed signaling.

A hub consists of two portions: the Hub Controller and Hub Repeater. The repeater is a protocol-controlled switch between the upstream port and downstream ports. It also has hardware support for reset and suspend/resume signaling. The controller provides the interface registers to allow communication to/from the host. Hub specific status and control commands permit the host to configure a hub and to monitor and control its ports.

A logical or physical entity that performs a function. The actual entity described depends on the context of the reference. At the lowest level, device may refer to a single hardware component, as in a memory device. At a higher level, it may refer to a collection of hardware components that perform a particular function, such as a Universal Serial Bus interface device. At an even higher level, device may refer to the function performed by an entity attached to the Universal Serial Bus; for example, a data/FAX modem device. Devices may be physical, electrical, addressable, and logical.

Downstream

The direction of data flow from the host or away from the host. A downstream port is the port on a hub electrically farthest from the host that generates downstream data traffic from the hub. Downstream ports receive upstream data traffic.

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180P2M specifications

The Philips 180P2M is a high-performance monitor that combines cutting-edge technology with an array of features designed to enhance the user experience. Boasting a 18.1-inch LCD display, the monitor is perfectly suited for both professional and casual use, making it a versatile choice for various computing needs.

One of the standout characteristics of the Philips 180P2M is its impressive resolution. With a native resolution of 1280 x 1024 pixels, this monitor delivers sharp and clear images that are ideal for text-heavy applications and detailed graphics. The 4:3 aspect ratio ensures that users get the most out of their workspace, making it easier to view multiple windows side by side.

The monitor incorporates Philips’ innovative technology, including the PerfectFlat screen feature. This technology ensures a smooth and consistent surface across the display, reducing glare and reflections. This is particularly beneficial in brightly lit environments, providing a more comfortable viewing experience. Additionally, the anti-static coating minimizes dust adhesion, ensuring that the screen remains clean and clear over time.

Another notable feature is the monitor's diverse connectivity options. The Philips 180P2M supports both analog and digital inputs, allowing for easy connections to a variety of devices, including computers, laptops, and other multimedia sources. The inclusion of multiple VGA ports ensures compatibility with older systems, making it a flexible choice for users with different setup requirements.

In terms of ergonomics, the Philips 180P2M excels with its height-adjustable stand, allowing users to customize their viewing angle for optimal comfort. This adjustability is important for long working sessions, reducing strain on the neck and eyes. The monitor also features quick access buttons that allow users to effortlessly navigate through settings and adjust display parameters to their preference.

Energy efficiency is another critical aspect of the Philips 180P2M. The monitor is designed to consume less power without compromising performance, making it an environmentally friendly choice. The Energy Star certification further attests to its commitment to sustainability.

In summary, the Philips 180P2M offers a blend of advanced display technology, ergonomic features, and energy efficiency. Its high-resolution screen, anti-glare properties, and flexible connectivity options make it a reliable choice for users across various applications. Whether for professional use in an office or casual computing at home, the Philips 180P2M proves to be a solid investment.