Digi ConnectCore - Line-Out Connector Pinout, J18; Line-In Connector Pinout, J12; Microphone Connector Pinout, J15

About the development board Audio interface
ConnectCore for i.MX51 Hardware Reference Manual
76
Line-out connector pinout, J18
Pin Signal
1 GND
2 LINE-OUT-RIGHT
3 LINE-OUT-LEFT
4 HEADPHONE-DETECT
5 -
Line-in connector pinout, J12
Pin Signal
1 GND
2 LINE-IN-RIGHT
3 LINE-IN-LEFT
4 GND
5 GND
Microphone connector pinout, J15
Pin Signal
1 GND
2 MIC-IN
3 MICBIAS
4 GND
5 GND