USB2.0TYPE-C线缆接线图

TYPE-C接口也可以只接USB2.0的信号。

1. Pin B5 (VCONN) of the USB Type-C plug shall be used in electronically marked versions of this cable.
   See Section 4.9.
2. Contacts B6 and B7 should not be present in the USB Type-C plug.
3. All VBUS pins shall be connected together within the USB Type-C plug. A bypass capacitor is not
   required for the VBUS pin in the USB 2.0 Type-C cable.
4. All GND pins shall be connected together within the USB Type-C plug.
5. All USB Type-C plug pins that are not listed in this table shall be open (not connected).
6. Shield and GND grounds shall be connected within the USB Type -C plug on both ends of the cable
   assembly.

USB信号定义：http://www.usbzh.com/article/detail-206.html
USB接口大全：http://www.usbzh.com/article/detail-144.html
TYPE-C信号定义：http://www.usbzh.com/article/detail-722.html