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The figure and table below illustrate the pin assignment and pin definition of the earphone interface J401.
Table 5: Pin Definition of J401
Pin No.
Pin Name
1
MIC
2
AGND
3
SPK_R
4
SPK_L
5, 6
NC
Mini_PCIe-C_EVB_User_Guide
6
4
2
Figure 13: Pin Assignments of Earphone Interface J401
UMTS/HSPA+/LTE Standard Module Series
5
3
1
Function
Microphone input
Dedicated GND for audio
Right channel of stereo audio output
Left channel of stereo audio output
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Mini PCIe-C EVB User Guide
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