Power-Off Scenario - Quectel EG21-G Reference Design

1.2.2. Power-off Scenario

VBAT
PWRKEY
STATUS
(OD)
Module
Status
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 the AT command, please keep PWRKEY at a high level after the
2.
execution of the command. Otherwise, the module will turn itself back on after being shut down.
EG21-G_Reference_Design
≥
650ms
RUNNING
Figure 2: Timing of Turning off Module
LTE Standard Module Series
EG21-G Reference Design
≥29.5s
Power-down procedure
OFF
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