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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Philips 220XW8 user manual Device
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220XW8 specifications

The Philips 220XW8 is a versatile and innovative monitor designed to meet the needs of both professional and casual users. With its sleek design and advanced features, this monitor has become a popular choice among those looking to enhance their multimedia experience and productivity.

One of the standout features of the Philips 220XW8 is its impressive display. The monitor boasts a 21.5-inch screen size, providing ample real estate for multitasking and enjoying high-definition content. With a resolution of 1920x1080 pixels (Full HD), users can expect crisp and vibrant visuals, making it ideal for watching movies, playing games, and working on detailed graphics.

In terms of technology, the Philips 220XW8 utilizes IPS (In-Plane Switching) technology. This means it offers wide viewing angles of up to 178 degrees, ensuring that colors remain accurate and consistent regardless of the angle from which the screen is viewed. This is particularly beneficial for collaborative work environments where multiple users might need to view the display simultaneously.

The monitor also features an impressive response time of 5 milliseconds, minimizing motion blur during fast-paced action scenes or gaming sessions. Coupled with a 60 Hz refresh rate, the Philips 220XW8 ensures a smooth and enjoyable viewing experience, free from lag and ghosting.

Another notable characteristic of the Philips 220XW8 is its ergonomic design. The monitor comes with a height-adjustable stand, allowing users to position the screen at their preferred height for improved comfort during long working hours. Additionally, it supports VESA mounting, enabling easy wall-mounting options for those who prefer an uncluttered workspace.

For connectivity, the Philips 220XW8 is equipped with various input options, including HDMI, DVI, and VGA ports. This ensures compatibility with various devices, including laptops, desktops, and gaming consoles. Furthermore, the monitor features built-in speakers for convenient audio playback without the need for additional external speakers.

Another significant aspect of the Philips 220XW8 is its energy efficiency. The monitor is designed to consume minimal power while delivering high performance, aligning with modern sustainability efforts. It is certified with the Energy Star rating, helping users reduce their carbon footprint while enjoying quality entertainment or productive work.

Overall, the Philips 220XW8 combines aesthetic appeal with advanced technologies to provide an exceptional viewing experience. With its impressive display quality, ergonomic features, and connectivity options, it is a compelling choice for anyone looking to enhance their computing setup.
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