Turn Off - Quectel EC200A Series Hardware Design

The power-up scenario is illustrated in the following figure.
VBAT
PWRKEY
VDD_EXT
USB_BOOT
RESET_N
STATUS
(OD)
UART
USB
.
NOTE
1. Make sure that 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 4.7 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:
NOTE 1
≥ 500 ms
≤ 0.5 V
V
IL
About 5 ms
≥ 100 ms. After this time, the pin can be set
high level by an external circuit.
About 22 ms
I nactive
Inactive
Figure 11: Power-up Timing
LTE Standard Module Series
≥ 10 s
≥ 10 s
≥ 10 s
Active
Active