LPWA Module Series
BG950A-GL&BG951A-GL_Hardware_Design
23 / 84
Pin Name
Pin
No.
I/O
Description
DC Characteristics Comment
I2C_SCL
40
OD
I2C serial clock
(for external codec)
External pull-up
resistor is required.
It is recommended
to use VDD_EXT as
the power supply of
the external pull-up
resistor.
If unused, keep
them open.
I2C_SDA
41
OD
I2C serial data
(for external codec)
Antenna Interfaces
Pin Name
Pin
No.
I/O
Description
DC Characteristics Comment
ANT_MAIN
60
AIO
Main antenna interface
50 Ω impedance
ANT_GNSS
49
AI
GNSS antenna interface
50 Ω impedance.
If unused, keep this
pin open.
GPIO Interfaces
*
Pin Name
Pin
No.
I/O
Description
DC Characteristics Comment
GPIO1
25
DIO
General-purpose
input/output
V
OL
max = 0.36 V
V
OH
min = 1.44 V
V
IL
min = -0.2 V
V
IL
max = 0.54 V
V
IH
min = 1.26 V
V
IH
max = 2.0 V
1.8 V power
domain.
If unused, keep
these pins open.
GPIO2
26
DIO
GPIO3
64
DIO
GPIO4
65
DIO
GPIO5
66
DIO
GPIO6
85
DIO
GPIO7
86
DIO
GPIO8
87
DIO
GPIO9
88
DIO
ADC Interfaces
Pin Name
Pin
No.
I/O
Description
DC Characteristics Comment
ADC0
24
AI
General-purpose ADC
interface
Voltage range:
0–1.8 V
If unused, keep
them open.
