Product Name
EK-AI7931LD
Version
E
Doc No
912-13802
Date
2022/11/14
Page
13 / 26
PRODUCT USER GUIDE
www.acsip.com.tw
4.3.
Audio
The EK-AI7931LD has on-board audio connector associated with different functionalities of the board.
The detail of audio related function can refer to Table 2.
Table 2 Audio related function
item
Detail
J8
3.5mm audio jack for external active speaker.
J6
Audio-Left_P switch , Pin(3,2,1) Pin define (Amp_L_in_P , Module_audio_out_L, Audio jack_L_in)
Select pin 2 & 1, The audio is output by audio jack. Select pin 3 & 2, The audio is output by speaker (J10)
J24
Audio-Right_P switch, Pin(3,2,1) Pin define (Audio jack_R_in , Module_audio_out_R ,Amp_R_in_P)
Select pin 3 & 2, The audio is output by audio jack. Select pin 2 & 1, The audio is output by speaker (J11)
J85
Audio-Left_N , Pin(1,2) Pin define (Audio_L_N,GND)
J86
Audio-Right_N, Pin(1,2) Pin define (GND, Audio_R_N)
J10
Audio header for left speaker
J11
Audio header for right speaker
U8
AMIC for left channel (the microphone hole is set at back side of EK-AI7931LD)
U9
AMIC for right channel (the microphone hole is set at back side of EK-AI7931LD)
SW2
Audio volume up button
SW3
Audio volume down button
Figure 6. Audio related function
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