2.ProductSpecications
2.1.5.USB
2-1-5(a)UniversalSerialBus
UniversalSerialBus(USB)isaserialbusstandarttointerfacedevices.
•Designedtoallowperipharelstobeconnectedusingasinglestandardizedinterfacesocket.
•Improveplugandplaycapabilities.
•Poweringlowcomsumptiondeviceswithouttheneedforexternalpowersupply.
•Allowingsomedevicestobeusedwithoutrequiringindividualdevicesdrivertobeinstalled.
2-1-5(b)DeviceClass
•0X08:USBmassstoragedeviceclassusedforUSBashdrives,Memorycardreader,digitalaudio.
•0X09:USBhubs
•0X0B:Smartcardreaders.
•0X0E:USBvideodeviceclass,webcamlikedevices,motionimagecapturedevices.
•0XE0:Wirelesscontroller,forexampleBluetoothdongles.
2-1-5(c)USBConnector
•Theconnectoraredesignedtoberobust.
•ItisdifculttoincorrectlyattachaUSBconnector.
•Theconnectorareparticularlycheaptomanufacture.
•TheconnectorenforcethedirectedtopologyofaUSBnetwork.
•Amoderateinsertion/removalforceisspecied.
•Theconnectorconstructionalwaysensuresthattheexternalsheathsontheplugcontactwithitscounterpartinthe
receptaclebeforethefourconnectorwithinareconnected.
•TheUSBstandartspeciesrelativelylowtolerancesforcompliantUSBconnectors,intendingtominimize
incompatibilitiesinconnectorsproducedbydifferentvendor.
2-4Copyright©1995-2011SAMSUNG.Allrightsreserved.