Smart Module Series
SC262R_Series_Hardware_Design 24 / 115
GND
Pin Name
Pin No.
GND
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,
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.
I/O
Description
DC Characteristics
Comment
MIC1_P
4
AI
Microphone input
for channel 1 (+)
MIC_GND
5
AI
Microphone
reference ground
If it is not used,
connect it to the
ground.
MIC2_P
6
AI
Microphone input
for headset (+)
EAR_P
8
AO
Earpiece output
(+)
EAR_N
9
AO
Earpiece output (-)
SPK_P
10
AO
Speaker output (+)
SPK_N
11
AO
Speaker output (-)
HPH_R
136
AO
Headphone right
channel output
HPH_REF
137
AO
Headphone
reference ground
HPH_L
138
AO
Headphone left
channel output
HS_DET
139
AI
Headset hot-plug
detect
High level by
default.
MIC_BIAS1
147
AO
Bias voltage
output for
microphone 1
V
O
= 1.6
–2.85 V
MIC3_P
148
AI
Microphone input
for channel 2 (+)
MIC_BIAS2
155
AO
Bias voltage
output for
microphone 2
V
O
= 1.6
–2.85 V
USB Interface
