LPWA Module Series
BG77 Hardware Design
BG77_Hardware_Design 32 / 76
3.6.2. Turn off Module
Either of the following methods can be used to turn off the module:
Normal power down procedure: Turn off the module using the PWRKEY pin.
Normal power down procedure: Turn off the module using
AT+QPOWD
command.
3.6.2.1. Turn off Module Using the PWRKEY Pin
Driving the PWRKEY pin to a low level voltage for a duration between 650ms and 1500ms, the module
will execute power-down procedure after the PWRKEY is released.
The power-off timing is illustrated in the following figure.
VBA T
PWRKEY
≥
1.3s
650ms~1500ms
RUNNING
Power-down procedure
OFF
Module
Status
STATUS
V
IL
≤
0.45V
Figure 8: Timing of Turning off Module
3.6.2.2. Turn off Module Using AT Command
It is also a safe way to use
AT+QPOWD
command to turn off the module, which is similar to turning off the
module via PWRKEY pin.
Please refer to
document [2]
for details about
AT+QPOWD
command.
3.7. Reset the Module*
RESET_N, which is multiplexed from PWRKEY, is used to reset the module. Due to platform limitations,
the chipset has integrated the reset function into PWRKEY.
