Philips 200P6IG User Manual

Also see for 200P6: Supplementary guide User manual Specifications Declaration of conformity User manual

Contents

Glossarycontrolled switch between the upstream port and downstream ports. It also has hardware supportfor reset and suspend/resume signaling. The controller provides the interface registers to allowcommunication to/from the host. Hub specific status and control commands permit the host toconfigure a hub and to monitor and control its ports.DeviceA logical or physical entity that performs a function. The actual entity described depends on thecontext of the reference. At the lowest level, device may refer to a single hardware component, asin a memory device. At a higher level, it may refer to a collection of hardware components thatperform a particular function, such as a Universal Serial Bus interface device. At an even higherlevel, 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, andlogical.DownstreamThe direction of data flow from the host or away from the host. A downstream port is the port on ahub electrically farthest from the host that generates downstream data traffic from the hub.Downstream ports receive upstream data traffic.UpstreamThe direction of data flow towards the host. An upstream port is the port on a device electricallyclosest to the host that generates upstream data traffic from the hub. Upstream ports receivedownstream data traffic.file:///D|/My%20Documents/dfu/200P6/english/200P6/glossary/glossary.htm (8 of 9)2005-09-15 1:07:20 PM