Quectel EG915U-EU - Turn off

LTE Standard Module Series
EG915U-EU_Hardware_Design 34 / 81
The turn on scenario is illustrated in the following figure.
V
IL
≤ 0.5 V
VBAT
PWRKEY
≥ 2 s
RESET_N
I nactive
ActiveUART
Note 1
I nactive Active
USB
VDD_EXT
About 1.15 s
≥ 4 s
≥ 2.23 s
Figure 11: Power-on Timing
.
3.6. Turn Off
The following procedures can be used to turn off the module:
⚫ Using the PWRKEY pin.
⚫ Using AT+QPOWD command.
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.
NOTE