Micro B USB Jack Pinout, Specifications, Connections Apr 15, 2018The micro USB Jack has five pins through which the power and data is transferred, the 4th pin ID is used for mode detection, this indicates if the USB is used only for power or for data transfer. Of the remaining four pins two pins (pin 1 and Pin 5) are used to provide the Vcc and Ground. USB pinout, wiring and how it works! - Electroschematics USB A, B 2.0 and 3.0 Cable Pinout The USB cable provides four pathways- two power conductors and two twisted signal conductors. The USB device that uses full speed bandwidth devices must have a twisted pair D+ and D- conductors. The data is transferred through the D+ and D- connectors while Vbus and Gnd connectors provide power to the USB device.