Glossary

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.

Device

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

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150S8 specifications

The Philips 150S8 monitor is a reliable and versatile display option that caters to both professional and everyday users, merging practical performance with sleek design. Featuring a 15-inch LCD screen, the 150S8 boasts a resolution of 1024 x 768 pixels, which ensures crisp image quality that is suitable for various applications, from office tasks to casual use.

One of the standout features of the Philips 150S8 is its excellent color accuracy and vibrant visuals. The monitor leverages advanced display technologies that enhance the viewing experience by delivering brighter, sharper images with improved contrast ratios. This is particularly beneficial for graphic design, photo editing, and other visual media work where color fidelity is paramount.

The Philips 150S8 is equipped with a fast response time, reducing motion blur during quick transitions and making it a good choice for video playback and gaming, even at the moderate size. With an aspect ratio of 4:3, users get a traditional widescreen experience, making it easy to manage multiple windows and applications simultaneously.

Moreover, ergonomics play an important role in the design of the Philips 150S8. The monitor features adjustable settings for height, swivel, and tilt, allowing users to customize their setup for optimal viewing comfort. This focus on user wellness extends to its low blue light technology, which effectively reduces eye strain during prolonged usage sessions, an essential consideration for modern work environments.

Connectivity is also a strong point for the Philips 150S8. It offers a range of input options, including VGA and DVI ports, ensuring compatibility with a variety of devices. This flexibility allows users to connect the monitor seamlessly to their computers or laptops without sacrificing performance.

In terms of energy efficiency, the Philips 150S8 is designed with sustainability in mind. It conforms to various environmental standards, contributing to reduced power consumption, which is an increasingly important factor for eco-conscious consumers.

Overall, the Philips 150S8 monitor combines functionality, user-friendly features, and modern technology, making it an excellent addition to any workspace or home office environment. Its balance of performance and ergonomics ensures that it can meet the demands of a wide range of users without compromising on quality.
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