USB协会标准规范

The USB 3.0 Micro-AB receptacle is identical to the USB 3.0 Micro-B receptacle, except for keying difference. It accepts either a USB 3.0 Micro-A plug or a USB 3.0 Micro-B plug. The USB 3.0 Micro-AB receptacle is only allowed on OTG products, which may function as either a host or device. All other uses of the USB 3.0 Micro-AB receptacle are prohibited. . The USB 3.0 Micro-A plug is identical to the USB 3.0 Micro-B plug, except for keying difference and ID pin connections. The USB 3.0 Micro-A plug, the USB 3.0 Micro-AB receptacle, and the USB 3.0 Micro-B receptacle and plug all belong to the USB 3.0 Micro-B connector family since their interfaces differ only in keying. Similar to the USB 2.0 Micro-A plug, the USB 3.0 Micro-A plug is defined for OTG applications only