usb_20.pdf
usb2.0的英文spec
UniversalSerialBusSpecificationRevision2.0
ii
ScopeofthisRevision
The2.0revisionofthespecificationisintendedforproductdesign.Everyattempthasbeenmadetoensurea
consistentandimplementablespecification.Implementationsshouldensurecompliancewiththisrevisi
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