Quectel EC200U-CN

LTE Standard Module Series
EC200U_Series_Hardware_Design 35 / 94
V
IL
≤ 0.5 V
VBAT
PWRKEY
≥ 2 s
RESET_N
STATUS
(DO)
Inactive
ActiveUART
NOTE1
Inactive ActiveUSB
VDD_EXT
≥ 5.05 s
About 1.15 s
≥ 4 s
≥ 2.23 s
Figure 12: Power-up Timing
1. Please make sure that VBAT is stable before PWRKEY is pulled down. It is recommended that the
time interval between powering up VBAT and pulling down PWRKEY is no less than 30 ms.
2. PWRKEY can be pulled down directly to GND with a recommended 1 kΩ resistor if the module
needs being powered on automatically and shutdown is not needed.
3.7.2. Turn off Module
The following ways can be used to turn off the module:
⚫ Turn off the module with PWRKEY.
⚫ Turn off the module by using AT+QPOWD.
NOTE