Turn Off - Quectel EG915U-EU Manual

The turn on scenario is illustrated in the following figure.
VBAT
PWRKEY
VDD_EXT
RESET_N
UART
USB
.
NOTE
1. Make sure that the VBAT is stable before pulling down PWRKEY pin. It is recommended that the
time difference between powering up VBAT and pulling down PWRKEY pin is no less than 30 ms.
2. PWRKEY can be pulled down directly to GND with a recommended 1 kΩ resistor if module needs to
be powered on automatically and shutdown is not needed.

3.6. Turn Off

The following procedures can be used to turn off the module:
⚫
Using the PWRKEY pin.
⚫
Using AT+QPOWD command.
EG915U-EU_Hardware_Design
Note 1
≥ 2 s
≤ 0.5 V
V
IL
About 1.15 s
≥ 4 s
I nactive
≥ 2.23 s
I nactive
Figure 11: Power-on Timing
LTE Standard Module Series
Active
Active
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