Quectel Smart EVB G2 User Manual

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Smart EVB G2 User Guide
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Table 8: Pin Definition of Headset Interface
The following figure shows the sketch design of audio plug which suits for the audio jack on Smart EVB
G2.
2
1
MIC
GND
SW
SPK_R
SPK_L
3
4
32Ω
32Ω
HS_DET
5
Figure 29: Sketch of Audio Plug
4.7.3. Earphone Interface
Smart EVB G2 provides one earphone interface and the earphone is soldered onto the Smart EVB G2 via
test points TP1203 and TP1204. The following figure shows a reference circuit design for earphone
interface.
Pin No.
Pin Name
Function
1
MIC
Positive microphone input
2
GND
Dedicated GND for audio
3
R-AUDIO
Earphone right channel
4
DETECT
Earphone detection
5
L-AUDIO
Earphone left channel
6
GND
Ground
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Quectel Smart EVB G2 Specifications

General

Brand	Quectel
Model	Smart EVB G2
Category	Motherboard
Language	English