Smart Module Series
SC20_Series_Hardware_Design 25 / 133
LDO5_1V8
111
PO
1.8 V output
Vnom = 1.8 V
I
O
max = 20 mA
Power supply for
external GPIO’s
pull-up and level
shift circuits.
LDO6_1V8
125
PO
1.8 V output
Vnom = 1.8 V
I
O
max = 100 mA
Power supply for
peripherals.
If it is used, connect
an external
2.2–4.7 μF
capacitor to this pin
in parallel.
If it is not used,
keep it open.
LDO17_2V85
129
PO
2.85 V output
Vnom = 2.85 V
I
O
max = 300 mA
Power supply for
peripherals.
If it is used, connect
an external
2.2–4.7 μF
capacitor to this pin
in parallel.
If it is not used,
keep it open.
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, 147–150, 160–178, 180–182, 184–186, 188, 189, 192, 193, 198, 200,
201, 208, 209
Audio Interfaces
Pin Name
Pin
No.
I/O
Description
DC Characteristics Comment
MIC1P
4
AI
Microphone input
for channel 1 (+)
MIC_GND
5
Microphone
reference ground
MIC2P
6
AI
Microphone input
for headset (+)
EARP
8
AO
Earpiece output
(+)
EARN
9
AO
Earpiece output
(-)
