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Quectel LTE Standard Module Series - Power-Off Scenario

Quectel LTE Standard Module Series
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LTE Standard Module Series
EG21-G Reference Design
EG21-G_Reference_Design 7 / 8
1.2.2. Power-off Scenario
VBAT
PWRKEY
29.5s
650ms
RUNNING
Power-down procedure
OFF
Module
Status
STATUS
(OD)
Figure 2: Timing of Turning off Module
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.

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