Turn Off Module; Turn Off Module Using The Pwrkey Pin; Turn Off Module Using At Command - Quectel EG91 Series Hardware Design

NOTES
Please make sure that VBAT is stable before pulling down PWRKEY pin. The time between them
1.
is no less than 30ms.
PWRKEY can be pulled down directly to GND with a recommended 10K resistor if module needs
2.
to be powered on automatically and shutdown is not needed.

3.7.2. Turn off Module

Either of the following methods can be used to turn off the module:
 Normal power-off procedure: Turn off the module using the PWRKEY pin.
Normal power-off procedure: Turn off the module using AT+QPOWD command.


3.7.2.1. Turn off Module Using the PWRKEY Pin

Driving the PWRKEY pin to a low level voltage for at least 650ms, the module will execute power-off
procedure after the PWRKEY is released. The power-off scenario is illustrated in the following figure.
VBAT
PWRKEY
STATUS
Module
Status

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 turning off the
module via PWRKEY pin.
Please refer to document [2] for details about the AT+QPOWD command.
EG91_Hardware_Design
≥
650ms
RUNNING
Figure 13: Power-off Scenario
LTE Standard Module Series
≥ 30s
Power-down procedure
EG91 Hardware Design
OFF
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