LPWA Module Series
BG77 Hardware Design
BG77_Hardware_Design 18 / 76
VDD_EXT 21
PO
1.8V output
power supply
for external
circuit
Vnorm=1.8V
I
O
max=50mA
Power supply for
external GPIO’s
pull-up circuits.
If unused, keep this
pin open.
GND
22~25,
27, 28,
30, 31,
43, 47,
52~56,
58, 66,
73~75,
84~86,
88, 89
Ground
Turn on/off
Pin Name
Pin
No.
I/O
Description
DC Characteristics Comment
PWRKEY 46
DI
Turn on/off the
module
Vnorm=1.5V
V
IL
max=0.45V
PWRKEY should
never be pulled down
to GND permanently.
Reset
Pin Name
Pin
No.
I/O
Description
DC Characteristics
Comment
RESET_N 45
DI
Reset the
module
Vnorm=1.5V
V
IL
max=0.45V
Status Indication
Pin Name
Pin
No.
I/O
Description
DC Characteristics Comment
STATUS 78
DO
Indicate the
module’s
operation
status
V
OH
min=1.35V
V
OL
max=0.45V
1.8V power domain.
If unused, keep this
pin open.
NETLIGHT 79
DO
Indicate the
module’s
network activity
status
V
OH
min=1.35V
V
OL
max=0.45V
BOOT_CONFIG.
Do not pull it up
before startup.
1.8V power domain.
If unused, keep this
pin open.
USB Interface
Pin Name
Pin
I/O
Description
DC Characteristics
Comment
