LTE-A Module Series
EG18 Hardware Design
EG18_Hardware_Design 41 / 104
3.6.2. Turn off the Module
The following two methods can be used to turn off the module: through PWRKEY or
AT+QPOWD
command.
3.6.2.1. Turn off the Module Through PWRKEY
Driving PWRKEY to a low level voltage for at least 800ms, then the module will execute power-down
procedure after the PWRKEY is released. The timing of turn-off scenario is illustrated by the following
figure.
VBAT
PWRKEY
≥
800ms
RUNNING
Power-down procedure
OFF
Module
Status
STATUS
≥
30s
VDD_EXT
VDD_RF
≥
1.5s
≥
10s
USIM_VDD
≥
1.6s
Figure 14: Timing of Turning off the Module
3.6.2.2. Turn off the Module Through AT Command
It is also a safe way to use
AT+QPOWD
command to turn off the module. Please refer to
document [3]
for more details about the command.