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VBA T
PWRKEY
STATUS
Module
Status
3.4.2. Turn Off with AT Command
It is also a safe manner to turn off the module via AT+QPOWD command.
NOTE
1.
To avoid damaging internal flash data, do not switch off the power supply when the module works
normally. The power supply can only be cut off after the module is shut down by PWRKEY or AT
commands.
2.
When turning off module with the AT command, keep PWRKEY at high level after the execution of
the command. Otherwise the module will be turned on again after a successfully turn-off.
3.5. Reset
The module can be reset by driving RESET_N low for 250-600 ms and then releasing it.
Table 11: RESET_N Pin Description
Pin Name
Pin No.
RESET_N
1
The recommended circuit is similar to the PWRKEY control circuit. An open drain/collector driver can
EG060K &EG120K _Series_Hardware_Design
103
800 ms
RUNNING
Figure 14: Timing of Turning Off the Module
I/O
Description
DI
Reset the module
5 s
Power-down procedure
DC Characteristics
V
max = 2.1 V
IH
V
min = 1.3 V
IH
V
max = 0.5 V
IL
LTE-A Module Series
OFF
Comment
1.8 V power domain.
Pulled up internally.
Active low.
39 /
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