Smart LTE Module Series
SC650T Hardware Design
SC650T_Hardware_Design 25 / 131
MIC_BIAS1
44
AO
Microphone bias
voltage
V
O
=1.6V~2.85V
Dias voltage for
DMIC1
MIC_BIAS2
233
AO
Microphone bias
voltage
V
O
=1.6V~2.85V
Dias voltage for
AMIC2
MIC_BIAS3
167
AO
Microphone bias
voltage
V
O
=1.6V~2.85V
Dias voltage for
DMIC2
LINE_OUT_3
228
AO
Audio output
LINE_OUT_R
EF
227
AI
Audio output
reference ground
LINE_OUT_4
226
AO
Audio output
AMIC1_P
218
AI
Analog microphone
positive input for
channel 1
AMIC1_M
217
AI
Analog microphone
negative input for
channel 1
AMIC2_P
216
AI
Analog microphone
positive input for
headset
AMIC2_M
215
AI
Analog microphone
negative input for
headset
EAR_P
53
AO
Earpiece positive
output
EAR_N
52
AO
Earpiece positive
output
PDM_CLK
55
AO
External audio
power amplifier
clock interface
PDM_DATA
54
AO
External audio
power amplifier data
interface
WSA_EN
230
DO
External audio
power amplifier
enable signal
HPH_R
51
AO
Headphone right
channel output
HPH_REF
50
AI
Headphone
reference ground
HPH_L
49
AO
Headphone left
channel output