Smart Module Series
SC200L_Series(Dual-band Wi-Fi)_Hardware_Design 21 / 111
3.3. Pin Description
Table 6: I/O Parameters Definition
Table 7: Pin Description
Type
Description
AI
Analog Input
AO
Analog Output
AIO
Analog Input/Output
DI
Digital Input
DO
Digital Output
DIO
Digital Input/Output
OD
Open Drain
PI
Power Input
PO
Power Output
PIO
Power Input/Output
Power Supply
Pin Name
Pin
No.
I/O
Description
DC Characteristics
Comment
VBAT_BB
1, 2
PIO
Power supply for
module’s
baseband part
Vmax = 4.20 V
Vmin = 3.50 V
Vnom = 3.80 V
Provide them with
sufficient current of at
least 3 A.
It is suggested to add a
TVS diode for surge
protection.
VBAT_RF
145,
146
PI
Power supply for
module’s RF
part.
Vmax = 4.20 V
Vmin = 3.50 V
Vnom = 3.80 V
LDO1_1V85
111
PO
1.85 V output
power supply
Vnom = 1.85 V
I
O
max = 100 mA
Power supply for
external GPIO’s pull-up
and level shift circuits.
LDO2_1V8
125
PO
1.8 V output
power supply
Vnom = 1.80 V
I
O
max = 200 mA
I/O power supply for
sensor, camera, and
other external
devices.