Product Info

LTE Standard Module Series
EC25 Hardware Design
EC25_Hardware_Design 46 / 112
Please make sure that VBAT is stable before pulling down PWRKEY pin. The time between them should
be no less than 30ms.
3.7.2. Turn off Module
The following procedures 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
≥29.5s ≥ 65 0m s
RUNNING
Po wer-of f pr ocedu re
OFF
Module
Status
STATUS
(OD)
Figure 13: Power-off Scenario of 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 turning off the
module via PWRKEY pin.
Please refer to document [2] for details about AT+QPOWD command.
NOTE