Smart Module Series
SC200L_Series(Dual-band Wi-Fi)_Hardware_Design 61 / 111
3.20.2. Reference Circuit Design for Earpiece Interface
EAR_P
EAR_N
R2
33 pF
33 pF
100 pF
C2
C3
C1
R1
Module
D1
D2
0R
0R
GND
Figure 26: Reference Circuit Design for Earpiece Interface
3.20.3. Reference Circuit Design for Headset Interface
ESD
MIC2_P
HPH_L
HS_DET
HPH_R
HPH_REF
3
3
pF
Module
R1
3
6
4
5
2
1
3
3
pF
C
3
C
4
C
5
F3
F2
F1
D1 D2 D3 D4
R3
0R
MIC_BIAS2
C6
4.7
μF
C2
22
μF R5
33R
R3
100K
MIC2_N
C7
1
μF
1
μF
C9
C8
NM
1.2K
C
10
NM
HPMIC_DET
10K
R2
C1
22
μF R6
33R
R6
0R
D5
MIC
R_AUDIO
L_AUDIO
GND
DETECT
3
3
pF
GND
Figure 27: Reference Circuit Design for Headset Interface