USB
Connector and Icon
Pin
Signal
1
2
3
4
+5 VDC
- Data
+ Data
Ground
Microphone
Connector and Icon (1/8” miniphone)
Pin
Signal
1 2 3
1 (Tip)
2 (Ring)
3 (Shield)
Audio_left
Audio_Right
Ground
Headphone
Connector and Icon (1/8” miniphone)
Pin
Signal
1 2 3
1 (Tip)
2 (Ring)
3 (Shield)
Audio_left
Power_Right
Ground
Line-in Audio
Connector and Icon (1/8” miniphone)
Pin
Signal
1 2 3
1 (Tip)
2 (Ring)
3 (Shield)
Audio_In_Left
Audio_In_Right
Ground
Line-out Audio
Connector and Icon (1/8” miniphone)
Pin
Signal
1 2 3
1 (Tip)
2 (Ring)
3 (Shield)
Audio_Out_Left
Audio_Out_Right
Ground
130 Appendix A Connector Pin Assignments