User's Manual

Smart Machine Smart Decision
SIM7020G_User Manual_V1.00 42 2019-01-15
and USB port are still accessible. The power consumption in this
mode is lower than normal mode.
Flight mode
AT command “AT+CFUN=4” can be used to set the module to
flight mode without removing the power supply. In this mode, the
RF part of the module will not work, but the serial port and USB
port are still accessible. The power consumption in this mode is
lower than normal mode.
PSM mode
In this mode, the module will be the least current consumption.
Meanwhile, all the output of the LDO and DCDC in the module
will be closed except the RTC power. And also all of the
functions will be unavailable except the RTC function. In PSM,
RTC_GPIO0 will change state from high to low. RTC_EINT
or PWRKEY can wake up the module.
Power off mode
Module will go into power off mode by sending the AT command
“AT+CPOWD=1” or pull down the PWRKEY pin, normally. In
this mode the power management unit shuts down the power
supply, and software is not active. The serial port and USB are is
not accessible.
6.3.2 Sleep mode
In sleep mode, the current consumption of module will be reduced to the minimal level, and module
can still receive paging message and SMS.
Several hardware and software conditions must be satisfied together in order to let SIM7020G enter
sleep mode:
1. UART condition
2. USB condition
3. Software condition
6.3.3 Minimum functionality mode and Flight mode
Minimum functionality mode ceases a majority function of the module, thus minimizing the power
consumption. This mode is set by the AT command which provides a choice of the functionality
levels.
● AT+CFUN=0: Minimum functionality
● AT+CFUN=1: Full functionality (Default)
● AT+CFUN=4: Flight mode
If SIM7020G has been set to minimum functionality mode, the RF function and SIM card function
will be closed. In this case, the serial port and USB are still accessible, but RF function and SIM card
will be unavailable.
If SIM7020G has been set to flight mode, the RF function will be closed. In this case, the serial port