Smart Module Series
SC20_Series_Hardware_Design 31 / 133
CAM1_RST 81 DO
Reset of front
camera
CAM1_PWD 82 DO
Power down of
front camera
CAM_I2C_SCL 83 OD
I2C clock of
camera
1.8 V power
domain.
CAM_I2C_SDA 84 OD
I2C data of
camera
1.8 V power
domain.
Keypad Interfaces
Pin Name
Pin
No.
I/O Description DC Characteristics
Comment
PWRKEY 114 DI
Turns on/off the
module
V
IL
max = 0.63 V
V
IH
min = 1.17 V
Internally pulled up
to 1.8 V. Active low.
KEY_VOL_UP 95 DI Volume up
If unused, keep this
pin open.
KEY_VOL_DOWN 96 DI Volume down
If unused, keep this
pin open.
SENSOR_I2C Interface
Pin Name
Pin
No.
I/O Description DC Characteristics
Comment
SENSOR_I2C_
SCL
91 OD
I2C clock for
external sensor
1.8 V power
domain.
SENSOR_I2C_
SDA
92 OD
I2C data for
external sensor
1.8 V power
domain.
ADC Interfaces
Pin Name
Pin
No.
I/O Description DC Characteristics
Comment
ADC 128 AI
General purpose
ADC
Maximum input
voltage: 1.7 V.
VBAT_SNS 133 AI
Battery voltage
detect
Maximum input
voltage: 4.5 V.
VBAT_THERM 134 AI
Battery
temperature
detect
Internally pulled up.
Externally connect
it to the 47 kΩ NTC
thermistor.
If it is not used,
connect it to GND
with a 47 kΩ
resistor.
Antenna Interfaces
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