Specifications

SIM7912&SIM7906 Hardware Design V1.02
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communicate.
Talk
Connection between two subscribers is in progress. In this case, the
power consumption depends on network settings such as DTX off/on,
FR/EFR/HR, hopping sequences and antenna.
Standby
Module is ready for data transmission, but no data is currently sent or
received. In this case, power consumption depends on network
settings.
Data
transmission
There is data transmission in progress. In this case, power
consumption is related to network settings (e.g. power control level);
uplink/downlink data rates, etc.
Minimum functionality mode
AT command “AT+CFUN=0” can be used to set the Module to a
minimum functionality mode without removing the power supply. In this
mode, the RF part of the Module will not work and the SIM card will not
be accessible, but the serial port and USB port are still accessible. The
power consumption in this mode is lower than normal mode.
Flight mode
AT command “AT+CFUN=4” or pulling down the W_disable1# pin 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.
Power off
Normally module will go into power off mode by sending the AT
command “AT+CPOF” or pull down the FUL_CARD_POWER_OFF#
pin. 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.
5.3.2 Sleep Mode
In sleep mode, the current consumption of module will be reduced to a very low level.
Several hardware and software conditions must be satisfied in order to let module enter into sleep mode:
 UART condition
 USB condition
 Software condition
Before designing, pay attention to how to realize sleeping/waking function.
NOTE