Device

Glossary

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 providing 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.

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240PW9 specifications

The Philips 240PW9 is a notable monitor that has made a significant impact in the market, blending high performance with many user-friendly features. This LCD monitor is specifically designed to cater to both professional and everyday users, making it an ideal choice for offices, creative tasks, and gaming.

One of the standout features of the 240PW9 is its high-resolution display. With a native resolution of 1920x1200 pixels, the monitor offers sharp visuals and detailed images that enhance the viewing experience. The widescreen format provides ample workspace, accommodating multiple windows side by side and improving productivity for users engaged in multitasking.

The monitor utilizes advanced technologies to deliver vibrant colors and deep contrasts. Integrated technology such as Philips' Dynamic Contast, enhances picture quality, delivering deeper blacks and brighter whites. This, together with a fast response time, ensures fluid motion for video playback and gaming, reducing motion blur and ghosting effects.

Another key characteristic of the 240PW9 is its ergonomic design. The monitor comes with an adjustable stand that allows users to tilt, swivel, and adjust the height of the screen, ensuring a comfortable viewing angle. This feature is particularly beneficial for long hours of use, reducing strain on the neck and eyes. The flicker-free technology further protects the eyes from fatigue, making it easy to work for extended periods.

Connectivity options are plentiful with the Philips 240PW9, featuring multiple input ports including VGA, DVI, and HDMI, allowing for seamless connectivity with various devices. Whether connecting to a computer, laptop, or gaming console, users can enjoy a hassle-free setup.

The monitor also incorporates energy-efficient technologies, earning it energy-saving certifications. This makes it an environmentally friendly choice without compromising on performance. The built-in speakers add convenience, reducing the need for additional external audio solutions.

In summary, the Philips 240PW9 stands out in the competitive monitor landscape with its high-resolution display, ergonomic features, and user-friendly technologies. It serves as a versatile tool for professionals and casual users alike, ensuring a blend of performance, comfort, and efficiency. Whether for work or play, the 240PW9 is a solid investment for any setup.