Product Info

LTE-A Module Series
EG12 Hardware Design
EG12_Hardware_Design 41 / 100
3.7.2. Turn off the Module
The following two methods can be used to turn off the module: using PWRKEY or AT+QPOWD
command.
3.7.2.1. Turn off the Module Using PWRKEY
Driving PWRKEY to a low level voltage for at least 800ms, the module will execute power-down
procedure after the PWRKEY is released. The turn-off scenario is illustrated in the following figure.
VBAT
PWRKEY
≥800ms
RUNNING
Power-down procedure
OFF
Module
Status
STATUS
≥30s
Figure 14: Timing of Turning off the Module
3.7.2.2. Turn off the Module Using AT Command
It is also a safe way to use AT+QPOWD command to turn off the module. Please refer to document [2]
for more details about the command.
1. In order to avoid damaging internal flash, please do not switch off the power supply when the module
works normally. Only after the module is shut down by PWRKEY or AT command, the power supply
can be cut off.
2. When turning off module with AT command, please keep PWRKEY at high level after the execution
of power-off command. Otherwise the module will be turned on again after successful turn-off.
NOTES