Voltage Monitor; Power On/Power Off/Reset Function; Power On - SimCom SIM7600V-H User Manual

3.1.3

Voltage Monitor

To monitor the VBAT voltage, the AT command "AT+CBC" can be used.
For monitoring the VBAT voltage outside or within a special range, the AT command
"AT+CVALARM" can be used to enable the under-voltage warning function.
If users need to power off Module, when the VBAT voltage is out of a range, the AT command
"AT+CPMVT" can be used to enable under-voltage power-off function.
Note: Under-voltage warning function and under-voltage power-off function are disabled by
default. For more information about these AT commands, please refer to Document [1].
3.2

Power on/Power off/Reset Function

3.2.1

Power on

Module can be powered on by pulling the PWRKEY pin down to ground.
The PWRKEY pin has been pulled up to dVDDinternally, so you does not need to pull it up
externally. It is strongly recommended to put a100nF capacitor and an ESD protection diode close
to the PWRKEY pin. Please refer to the following figure for the recommended reference circuit.
Turn on /off
impulse
The power-on scenarios are illustrated in the following figure.
SIM7600V-H_User Manual_V1.00
PWRKEY
4.7K
100nF
47K
Figure 8: ReferencePower on/off circuit
Smart Machine Smart Decision
dVDD
Diode
100Ω
On off logic
MODULE
22
Power
2018-02-24