Smart Module Series
SC200L_Series(Dual-band Wi-Fi)_Hardware_Design 23 / 111
SPK_N
11
AO
Speaker output
(-)
HPH_R
136
AO
Headphone right
channel output
HPH_REF
137
AO
Headphone
reference ground
If it is not used, connect
it to ground.
HPH_L
138
AO
Headphone left
channel output
HS_DET
139
AI
Headset
insertion detect
High level by default.
HPMIC_DET
150
AI
Headphone
microphone
detect
MIC_BIAS1
147
PO
Microphone bias
voltage 1
Vmin = 2.20 V
Vmax = 3.00 V
Vnom = 2.50 V
MIC3_P
152
AI
Microphone input
for channel 2 (+)
MIC3_N
151
AI
Microphone input
for channel 2 (-)
MIC_BIAS2
149
PO
Microphone bias
voltage 2
Vmin = 2.20 V
Vmax = 3.00 V
Vnom = 2.80 V
USB1 Interface
Pin Name
Pin
No.
I/O
Description
DC Characteristics
Comment
USB_VBUS
141,
142
PI
Charging power
input; USB 5 V
power input;
USB/adaptor
insertion detect
Vmax = 9.20 V
Vmin = 4.50 V
Vnom = 5.00 V
USB_DM
13
AIO
USB differential
data bus (-)
USB 2.0 standard
compliant. 9
0 Ω
differential impedance.
Supports USB OTG
mode, but does not
support USB hub.
USB_DP
14
AIO
USB differential
data bus (+)
USB_ID
16
DI
USB ID detection
High level by default.
If not used, keep it open.
USB2 Interface