Quectel RM520N-GL - Turn on

5G Module Series
RM520N-GL_Hardware_Design 32 / 84
To avoid damages to the internal flash, DON'T cut off the power supply before the module is completely
turned off by pulling down FULL_CARD_POWER_OFF# pin for more than 900 ms, and DON'T cut off
power supply directly when the module is working.
3.3.3. Monitor the Power Supply
AT+CBC command can be used to monitor the voltage value of VCC.
3.4. Turn on
FULL_CARD_POWER_OFF# is used to turn on/off the module or reset the module through hardware
reset. This input signal is 3.3 V tolerant and can be driven by either 1.8 V or 3.3 V GPIO. And it has
internally pulled down with a 100 kΩ resistor.
Table 8: Definition of FULL_CARD_POWER_OFF#
When FULL_CARD_POWER_OFF# is de-asserted (driven high, ≥ 1.19 V), the module will turn on
Pin
No.
Pin Name
I/O
Description
DC Characteristics
Comment
6
FULL_CARD_
POWER_OFF#
DI, PD
Turn on/off the module.
High level: Turn on
Low level: Turn off
V
IH
max = 4.4 V
V
IH
min = 1.19 V
V
IL
max = 0.2 V
Pull down with a
100 kΩ resistor.
NOTE