USB TYPE-C和USB3.1 TYPE-A插座适配器线缆接线图

1. Pin A5 (CC) of the USB Type-C plug shall be connected to GND through a resistor Rd (5.1 kΩ
   ± 20%). See Section 4.5.3.2.1 and Table 4-25 for the functional description and value of Rd.
2. This table that shielded twisted pair is used for all SDP’s
   and there are drain wires. If coaxial wire construction is used, then no drain wires are
   present, and the shields of the coaxial wires are connected to the ground pins.
3. Contacts B6 and B7 should not be present in the USB Type-C plug.
4. All VBUS pins shall be connected together within the USB Type-C plug. A 10 nF bypass
   capacitor is required for the VBUS pin in the USB Type-C plug end of the cable. The bypass
   capacitor should be placed as close as possible to the power supply pad. A bypass capacitor
   is not required for the VBUS pin in the Standard-A receptacle.
   5.Shield and GND grounds shall be connected within the USB Type-C plug and USB 3.1 Standard-A receptacle on both ends of the adapter assembly.
5. All USB Type-C plug pins that are not listed in this table shall be open (not connected)

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