Smart Module Series
SC200K_Series_Hardware_Design 29 / 105
CHG_SEL
127
DI
Charging select
By connecting this pin
to the ground, the
internal charger IC is
turned off.
BAT_ID
185
AI
Battery type detect
Input range: 0
–1.2 V.
If unused, keep it
open.
VBAT_SNS
133
AI
Battery voltage detect
Up to 4.5 V input
voltage.
BAT_THERM
134
AI
Battery temperature
detect
Supports 10 kΩ NTC
thermistor by default.
Connects to the NTC
thermistor when used.
If it is not used, it must
be connected to the
ground with an
external 10 kΩ resistor.
CS_M
183
AI
Battery current detect
(-)
If fuel gauge is not
used, connect these
pins to the ground.
Supports up to 3 A
current measurement.
CS_P
184
AI
Battery current detect
(+)
Antenna Interfaces
Pin Name
Pin
No.
I/O
Description
DC
Characteristics
Comment
ANT_MAIN
87
AIO
Main antenna
interface
50 Ω impedance.
ANT_DRX
131
AI
Diversity antenna
interface
ANT_GNSS
121
AI
GNSS antenna
interface
ANT_WIFI/BT
77
AIO
Wi-Fi/Bluetooth
antenna interface
Other Interfaces
Pin Name
Pin
No.
I/O
Description
DC
Characteristics
Comment
USB_BOOT
46
DI
Force the module into
download mode
V
IL
max = 0.48 V
V
IH
min = 1.39 V
Before turning on the
module, driving
USB_BOOT down to
GND can enable
module to enter into
download mode after