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4 pin USB A plug connector layout
4 pin USB A plug connector

 

USB
Pin Number
USB
Pin Name
Direction minijack
Pin Number
minijack
Pin Name
Description (may be empty)
1 USB Vcc (RED)   3 Vcc  
2 USB Data - (WHITE)   2 D -  
3 USB Data + (GREEN)   1 D +  
4 GND (BLACK)   4 GND  

 

4 pin 3.5mm (2.5mm) plug connector layout
4 pin 3.5mm (2.5mm) plug connector
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