Quectel Smart LTE Module Series Hardware Design page 26

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