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Audio Interfaces
Pin Name
MIC1_P
MIC1_M
MIC2_P
EAR_P
EAR_M
SPK_P
SPK_M
HPH_R
HPH_GND
HPH_L
HS_DET
MIC_BIAS
MIC3_P
MIC3_M
Keypad/Turn-on/off Interfaces
Pin Name
PWRKEY
SC200K_Series_Hardware_Design
221, 222, 223, 224, 226, 227, 228, 229, 230, 231, 233,
234, 235, 236, 237, 238, 240, 241, 243, 244, 245, 247,
248, 250, 251, 255, 256, 258, 259, 261, 266, 268, 269,
271, 272, 273, 274
Pin
I/O
Description
No.
Main microphone
4
AI
input (+)
Main microphone
5
AI
input (-)
Microphone input for
6
AI
headset (+)
8
AO
Earpiece output (+)
9
AO
Earpiece output (-)
Loudspeaker output
10
AO
(+)
Loudspeaker output
11
AO
(-)
Headphone right
136
AO
channel output
Headphone reference
137
AO
ground
Headphone left
138
AO
channel output
Headset hot-plug
139
AI
detect
Bias voltage output
147
PO
for microphone
Auxiliary microphone
148
AI
input (+)
Auxiliary microphone
149
AI
input (-)
Pin
I/O
Description
No.
Turn on/off the
114
DI
module
Smart Module Series
DC
Comment
Characteristics
If unused, needs to be
grounded.
High level by default.
Vmin = 2.20 V
Vmax = 3.00 V
Vnom = 2.50 V
DC
Comment
Characteristics
Active low.
V
max = 0.60 V
IL
Pulled up to VBAT
V
min = 1.30 V
IH
internally.
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