Turn Off Module Using At Command; Reset The Module - Quectel UC200T-EM Hardware Design

3.6.2.2. 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 turning off the
module via PWRKEY pin.
Please refer to document [2] for details about AT+QPOWD command.
NOTES
In order to avoid damaging internal flash, please do not switch off the power supply when the module
1.
works normally. Only after the module is shut down by PWRKEY or AT command, the power supply
can be cut off.
When turning off module with AT command, please keep PWRKEY at high level after the execution of
2.
power-off command. Otherwise the module will be turned on again after successful turn-off.

3.7. Reset the Module

The RESET_N pin can be used to reset the module. The module can be reset by driving RESET_N to a
low level voltage and then releasing it.
Table 8: RESET_N Pin Description
Pin Name Pin No.
RESET_N 20
The recommended circuit is similar to the PWRKEY control circuit. An open drain/collector driver or button
can be used to control the RESET_N.
Figure 8: Reference Circuit of RESET_N by Using Driving Circuit
UC200T-EM_Hardware_Design
I/O
DI
4.7K
Reset pulse
UMTS/HSPA(+) Module Series
UC200T-EM Hardware Design
Description
Reset the module
RESET_N
47K
Comment
1.8V power domain
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