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24 pin USB-C plug connector layout
24 pin USB-C plug connector

USB Type-C specification defines a small reversible-plug connector for USB devices.  Micro-USB 2.0 to USB-C is a USB2.0-only version of USB-C Full-Featured cable.

USB 2.0 micro-B to USB-C cable pinout

USB-C signal Description USB-C Signal  Pin Pin USB Standard-A signal USB Description
Ground   GND A1,B1, A12,B12 5 GND Ground
Bus Power   VBUS A4,B4,A9,B9 1 Vbus USB Vbus
Configuration channel. Pin shall be connected to GND through a resistor 5.1 kΩ   CC A5 N/C    
optional power supply for active cables schemes   VCONN B5 N/C    
USB differential pair, position 1, positive   Dp1 A6 3 D+ USB 2.0 differential pair, positive
USB differential pair, position 1, negative   Dn1 A7 2 D- USB 2.0 differential pair, negative
      4 ID Micro-USB ID pin. Shall be terminated as defined in the applicable specification for the cable type
Outer shield   shell shell   Outer shield

Contacts B6 and B7 should not be present in the USB Type-C plug. The receptacle side shall support the USB 2.0 differential pair present on Dp1/Dn1 or Dp2/Dn2. The plug orientation determines which pair is active.

USB-C cables that do not have shielded SuperSpeed pairs, sideband use pins, or additional wires for power lines can have increased cable length, up to 4 m. These USB-C cables only support 2.0 speeds and do not support alternate modes.

The USB Type-C Power-Only plug is a depopulated version of the USB Full-Featured Type-C plug or the USB 2.0 Type-C plug. Contacts for configuration channel, Vbus, and GND (i.e., A1, A4, A5, A9, A12, B1, B4, B9, and B12) shall be present, others are optional. Implementation of resistor or CC communication on pin A5 is required.

5 pin Micro USB A, Micro USB B plug connector layout
5 pin Micro USB A, Micro USB B plug connector
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USB-C to micro-USB 2.0 cable visual pinout:click to enlarge
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