LPWA Module Series
BG950A-GL&BG951A-GL_Hardware_Design
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For BG950A-GL module, pin 27 and pin 28 can only be used as CLI UART interface. When pin 27 and pin 28 are used as
CLI_TXD and CLI_RXD, the two pins should be connected to pin 95 and pin 94 respectively inside the module. For
BG951A-GL module, pin 27 and pin 28 can only be used as GNSS UART interface.
CLI UART Interface
Pin Name
Pin
No.
I/O
Description
DC Characteristics Comment
CLI_RXD
94
DI
CLI UART receive
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 these pins are
unused, keep them
open.
CLI_TXD
95
DO
CLI UART transmit
V
OL
max = 0.36 V
V
OH
min = 1.44 V
DBG UART Interface
Pin Name
Pin
No.
I/O
Description
DC Characteristics Comment
DBG_RXD
22
DI
Debug UART receive
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 these pins are
unused, keep them
open.
DBG_TXD
23
DO
Debug UART transmit
V
OL
max = 0.36 V
V
OH
min = 1.44 V
CLI/GNSS UART Interface
Pin Name
Pin
No.
I/O
Description
DC Characteristics Comment
CLI/GNSS_TXD
27
DO
CLI/GNSS UART
transmit
V
OL
max = 0.36 V
V
OH
min = 1.44 V
1.8 V power
domain.
If these pins are
unused, keep them
open.
CLI/GNSS_RXD 28
DI
CLI/GNSS UART receive
V
IL
min = -0.2 V
V
IL
max = 0.54 V
V
IH
min = 1.26 V
V
IH
max = 2.0 V
PCM Interface
*
Pin Name
Pin
No.
I/O
Description
DC Characteristics Comment
PCM_CLK
4
DO
PCM clock
V
OL
max = 0.36 V
V
OH
min = 1.44 V
1.8 V power
domain.
If unused, keep
them open.
PCM_SYNC
5
DO
PCM data frame sync
PCM_DIN
6
DI
PCM data input
V
IL
min = -0.2 V
V
IL
max = 0.54 V
V
IH
min = 1.26 V
V
IH
max = 2.0 V
PCM_DOUT
7
DO
PCM data output
V
OL
max = 0.36 V
V
OH
min = 1.44 V
I2C Interface
*
