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Pin No.
Signal Name
31
AU_MIC_P
30
AU_MIC_N
29
AU_AUXMIC_P
28
AU_AUXMIC_N
35
SPEAKER_P
36
SPEAKER_N
33
AU_RCV_P
34
AU_RCV_N
3.9.1 1
st
Audio Channel: Microphone
This channel is the module power-up default active audio channel.
The microphone input includes all the necessary circuitry to support a direct connection to an external
microphone device. It incorporates an internal bias voltage which can be adjusted by AT command. The
impedance is higher than 5M Ω.
3.9.2 1
st
Audio Channel: Receiver
This channel is the module power-up default active output for voice calls and DTMF tones. It is designed
as a differential output with 16Ω impedance.
nd
3.9.3 2
Audio Channel: Microphone
This channel can be switched by AT Command.
The microphone input includes all the necessary circuitry to support a direct connection to an external
microphone device. It incorporates an internal bias voltage which can be adjusted by AT command. The
impedance is higher than 5M Ω.
nd
3.9.4 2
Audio Channel: Speaker
This channel can be switched by AT Command. It is designed as a differential output and can be drove an
8Ω speaker directly.
G510 Hardware User Manual
Description
1st Audio channel
Balanced microphone input
2nd Audio channel
Balanced microphone input
2nd Audio channel
Output is balanced and can directly operate a hand free
speaker
1st Audio channel
Output is balanced and can directly operate a head set
Page 28 of 42
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