LTE-A Module Series
EG12 Hardware Design
EG12_Hardware_Design 41 / 97
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.
3.8. Reset the Module
The module can be reset by driving RESET_N low for 250ms~600ms and then releasing it.
Table 9: RESET_N Pin Description
Pin Name
Pin No.
Description
DC Characteristics
Comment
RESET_N
1
Reset the module
V
IH
max=2.1V
V
IH
min=1.3V
V
IL
max=0.5V
NOTES