Wiring diagram for USB-C to USB-A cable? - Electrical 1 Answer. The USB 3.1 specification spells out exactly how to make this, and any other USB C -to- USB legacy cable. USB-C is reversible and the resistor on the CC line informs the slave device on how to route the signals correctly. The value of this resistor can also be changed to signal higher current capacity (which you probably shouldn't do).wiring - How can I wire a Mini-USB to Micro-USB cableAug 23, 2017power supply - Wiring of a USB Y-Connector - Electrical Can the Data wires of a USB cable power a LED USB C to USB A pinout See more results USB Type C pinout diagram @ pinoutguide USB type-C cable. Alternate Mode dedicates some of the physical wires in the Type-C cable for direct device-to-host transmission of alternate data protocols. The four high-speed lanes, two sideband pins, two USB 2.0 pins and one configuration pin can be used for Alternate Mode transmission. The modes are configured using vendor-defined..