Glossary

USB 消除了“外壳恐惧症”——一种由打开电脑外壳安装附加周边设备所引起的害怕 感。USB同样避免了安装新周边设备时对复杂的“中断请求”(IRQ)设置的调整。

USB 清除了“端口拥塞”现象。若无 USB,个人电脑通常限于一台打印机、两个通讯端 口装置(一般是滑鼠和调制解调器),一个增强平行端口附加装置(例如扫描器或视频 照像机),以及一个戏手柄。越来越多的多媒体电脑运用的周边设备每天都出现于市 场。有了USB,多至 127 个装置同时可以运用于一台电脑上。

USB 允许“热插入”。无需关机、插入、重新起动、运行安装系统来安装周边设备。也 无需进行相反程序拔出某一装置。

简而言之,USB 将当今的“插入即怕”变成真正的“插入即用”!

插座 (Hub)

一种通用串行总线装置,为提供通用串行总线另外的连接。

插座是USB“插入即用”结构中的主要部件。下图显示一个典型的插座。插座从用户的角度简 化了USB之连接性,在廉价和简捷的基础上提供了高性能。

插座为带线接头,使USB的多附件特性得以实现。附加点则被称为端口。每一插座将单个附加 点转变成多个附加点。其总结构支持多个插座的相互串联。

插座的上游端口连接插座与主机。插座每一下游端口可与另一插座或功能装置连接。插座能够 检测、附上和拆下于每一下游端口,促使电源向下游装置的输送。每一下游端口皆能单独起 动、设置成全速或慢速。

一个插座由两部份组成:插座控制器和插座中继器。中继器是由规程控制的上游端口和下游端 口之间的枢纽。它也配有重设和暂停/继续信号的硬件支持。控制器提供接口寄存器,促成主 机间的往返通讯。插座具体状态和控制指令允许主机设置某一插座及控制其端口。

装置

一个执行某一功能的逻辑性或物质性实体。所述实际实体依其所涉及情况而定。在最低层次, 装置可指单个硬件元件,例如存储器。在较高层次,它可指执行某一特别功能的一套硬件元 件,例如通用串行总线接口装置。在更高层次,装置可指连接于通用串行总线的执行功能的实 体,例如数据/传真调控解调器。装置可能是物质的、电子的、可按址访问的和逻辑性的。

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Philips 220SW9 user manual 插座 Hub

220SW9 specifications

The Philips 220SW9 is a remarkable flat-panel LCD monitor that offers users an ideal blend of performance, energy efficiency, and ergonomic design. This model, equipped with a 22-inch display, is designed to meet the demands of both professional environments and home users, providing stunning visuals for various applications.

One of the standout features of the Philips 220SW9 is its resolution. It boasts a native resolution of 1680 x 1050 pixels, delivering sharp and clear images that enhance text clarity and color precision. This widescreen aspect ratio allows for more efficient multitasking and immersive viewing experiences. With a brightness of 250 cd/m², the monitor ensures vibrant images and improved visibility in various lighting conditions.

The monitor utilizes advanced LCD technology which not only enhances its image quality but also contributes to lower power consumption compared to traditional CRT monitors. The Philips 220SW9 adheres to Energy Star standards, making it an environmentally friendly choice. Users can enjoy significant savings on energy bills while reducing their carbon footprint.

The 220SW9 is equipped with a response time of 5ms, which minimizes the chances of motion blur during fast-paced video playback or gaming. This feature ensures a smooth viewing experience, making it suitable for various applications from graphic design to casual gaming.

Ergonomics play a crucial role in the design of the Philips 220SW9. The monitor features a height-adjustable stand, allowing users to customize their viewing height for maximum comfort. This adjustable design helps reduce neck strain during extended use, promoting a healthier workspace.

Connectivity options on the Philips 220SW9 include both VGA and DVI ports, ensuring compatibility with a range of devices, including PCs and laptops. This flexibility allows users to connect their monitor to different systems without hassle.

In summary, the Philips 220SW9 combines an expansive 22-inch display, impressive resolution, and ergonomic design with energy efficiency. Its array of features makes it a compelling choice for users looking for a reliable and versatile monitor that meets their everyday computing and entertainment needs. Whether for professional use or casual enjoyment, the Philips 220SW9 stands as a testament to quality and performance in the world of LCD monitors.