Quectel SC262R Series Hardware Design page 25

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GND
Pin Name
Pin No.
3, 7, 12, 15, 27, 51, 62, 69, 76, 78, 85, 86, 88, 89, 120, 122, 130, 132, 135, 140,
143, 144, 149, 162, 171, 172, 176, 187–191, 202–204, 206–224, 226–231,
GND
233–238, 240, 241, 243–245, 247, 248, 250, 251, 255, 256, 258, 259, 261, 266,
268, 269, 271–274
Audio Interfaces
Pin Name
Pin No.
MIC1_P
4
MIC_GND
5
MIC2_P
6
EAR_P
8
EAR_N
9
SPK_P
10
SPK_N
11
HPH_R
136
HPH_REF
137
HPH_L
138
HS_DET
139
MIC_BIAS1
147
MIC3_P
148
MIC_BIAS2
155
USB Interface
SC262R_Series_Hardware_Design
I/O
Description
Microphone input
AI
for channel 1 (+)
Microphone
AI
reference ground
Microphone input
AI
for headset (+)
Earpiece output
AO
(+)
AO
Earpiece output (-)
AO
Speaker output (+)
AO
Speaker output (-)
Headphone right
AO
channel output
Headphone
AO
reference ground
Headphone left
AO
channel output
Headset hot-plug
AI
detect
Bias voltage
AO
output for
microphone 1
Microphone input
AI
for channel 2 (+)
Bias voltage
AO
output for
microphone 2
Smart Module Series
DC Characteristics
V
= 1.6–2.85 V
O
V
= 1.6–2.85 V
O
Comment
If it is not used,
connect it to the
ground.
High level by
default.
24 / 115

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