usb2.0 sepcification
usbspecification
\Thisdocumentdefinesanindustry-standardUSB.Thespecificationdescribesthebusattributes,the
protocoldefinition,typesoftransactions,busmanagement,andtheprogramminginterfacerequiredto
designandbuildsystemsandperipheralsthatarecompliantwiththisstandard.
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