Usb Presentation

USB (Universal Serial jitney) Presentation to UCHUG - 2/06/08 G. Skalka What is USB? Universal Serial passenger vehicle A computer peripheral interface Ubiquitous crossways all computer platforms Several variations - continues to evolve Hot-swapable Provides three advantages way expansion Performance Standard connection method In the grey-haired Days . . . Mice and keyboards only connected to dedicated connectors or resultant manner Networking (as such) was only through serial com bearing Printers had their give birth connector Not much else!  representative Performance USB provides much higher(prenominal) selective information transfer speeds, with few wires! Birth of USB Defined by Intel and other industry leadership in early mid-nineties Ease of use was primary(a) goal Four-wire interface Point-to-point, soldiers-target architecture Bus expansion sub legacy connectors USB Connectors USB Cables Four wires (+5V , Return, data twisted pair) Up to 5 m (16.

4 ft) Longer connections use hubs or dynamical extensions Active extension incorporates a bus major powered hub USB Details army initiates all transfers Target can be dumb ternion device types host controllers Hubs Functions (Peripherals) Accommodates 7 tiers 5 hub levels, 127 devices Physical link is a tiered-star topography Host Controller yet one host in any USB system typically implemented in PC chipset (root hub) Host responsibilities Detect attachments and removals get by control and data flow between host and devices proctor status and activity Provide power to attached devices grade dr ivers included in most in operation(p) syst! ems Hubs Combined partition and repeater mustiness detect connections and disconnections downstream and report to host must(prenominal) manage downstream power Bus-powered hubs (Power from upriver) Must caboodle no more than 500 mA from upstream Must supply 100 mA to each downstream port Self-powered hubs (External power source) May...If you want to get a full essay, auberge it on our website: OrderEssay.net

If you want to get a full information about our service, visit our page: write my essay