LTE Standard Module Series
EC200T Series Hardware Design
EC200T_Series_Hardware_Design 38 / 90
3.7.2.1. Turn off Module Using the PWRKEY Pin
Driving the PWRKEY pin to a low level voltage for at least 650 ms, the module will execute power-down
procedure after the PWRKEY is released. The timing of turning off the module is illustrated in the following
figure.
Figure 12: Timing of Turning off Module
3.7.2.2. 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 the procedure
of turning off the module via PWRKEY pin.
Please refer to document [2] for details about AT+QPOWD 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 the AT command, please keep PWRKEY at a high level after the
execution of the command. Otherwise, the module will turn itself back on after being shut down.
3.7.3. Reset the Module
The RESET_N pin can be used to reset the module. The module can be reset by pulling the RESET_N
pin low for at least 300 ms and then releasing it. The RESET_N signal is sensitive to interference, so it is
recommended to route the trace as short as possible and surround it with ground.
NOTES
To Next Page
Loading...
Need help?
General
