Comparison of usb 2.0 and usb 3.0 standards

摘要

Connectivity between broad range of devices is today one of the key components on which developers of electronic devices have to focus. In my diploma thesis I will present the USB (Universal serial bus), today being most widely used PC bus. The main goal is to present and point out the differences between USB 2.0 and USB 3.0, on the other hand however, I also point out the compatibilty between both USB standards. Paper is devided into two parts, first I have focused on describing USB 2.0 standard followed with the presentation of the key inovations used in USB 3.0 standard. Being one of the important aspects of USB 2.0 standard USB On the go (OTG) technology, is presented as a short reference.udIntroduction is focused on the reasons for the birth of USB technology and also features the cronological overview of the USB standard. Following introduciton, are presented the key components that are forming USB as a standard. Both parts of my paper are dedicated to low-level communication overview. For the major part of my paper I have focused on protocol layer of USB standard. For communication on that level individual packages are characteristic. This is the component that describes the rules and ways of communication for a USB device plugged into a bus. I have also put some tought into a configuration process, when the USB device gets plugged into the bus.ud