N1_Hardware_User_Guide
Copyright © Neoway Technology Co., Ltd
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3.4 Hard Power-off
The PWR_N input pin is used to hard power off the module. Low-level pulse input for 13 seconds at this
pin can trigger the power-off status of the module. This pin is pulled up internally. Its typical high-level
voltage is 1.8 V. Leave this pin unconnected if it is not used. If a 2.8V/3.3V IO system is adopted, separate
it by adding a triode. Refer to 3.3 Hard Reset. Figure 3-11 shows the hard power-off sequence.
Figure 3-11
N1power-off sequence
VBAT
OTHERS
13s
PWR_N
Not defined
3.5 VRTC Power Supply
Pin
Signal
I/O
Function
Remarks
125
VRTC
I/O
RTC power supply
2V to 3.25V, typical value 3V
VRTC supplies power to the RTC of the module. A 22 μF capacitor is connected to VRTC inside the
module to keep the system clock working when replacing the power supply (battery) of the module. The
module will update the RTC clock after it is powered on and connected to the network.
Figure 3-12 shows the internal design of the VRTC pin.
Figure 3-12
VRTC design in the module
N1
RTC
Circuit
+
22µF
Backup
battery
