GSM/GPRS Module Series
M35 User Manual
M35_User_Manual Confidential / Released 24 / 85
1)
Use the EMERG_OFF pin only when failing to turn off the module by the command ―AT+QPOWD=1‖
and the PWRKEY pin. For more details, please refer to the Section 3.4.2.4.
Sleep Mode, the module can still receive paging message
and SMS from the system normally.
Software is active. The module has registered to the GSM
network, and the module is ready to send and receive
GSM data.
GSM connection is ongoing. In this mode, the power
consumption is decided by the configuration of Power
Control Level (PCL), dynamic DTX control and the working
RF band.
The module is not registered to GPRS network. The
module is not reachable through GPRS channel.
The module is registered to GPRS network, but no GPRS
PDP context is active. The SGSN knows the Routing Area
where the module is located at.
The PDP context is active, but no data transfer is ongoing.
The module is ready to receive or send GPRS data. The
SGSN knows the cell where the module is located at.
There is GPRS data in transfer. In this mode, power
consumption is decided by the PCL, working RF band and
GPRS multi-slot configuration.
Normal shutdown by sending the ―AT+QPOWD=1‖ command, using the
PWRKEY or the EMERG_OFF
1)
pin. The power management ASIC
disconnects the power supply from the base band part of the module, and
only the power supply for the RTC is remained. Software is not active. The
UART interfaces are not accessible. Operating voltage (connected to VBAT)
remains applied.
Minimum Functionality
Mode (without
Removing Power
Supply)
―AT+CFUN‖ command can set the module to a minimum functionality mode
without removing the power supply. In this case, the RF part of the module
will not work or the SIM card will not be accessible, or both RF part and SIM
card will be disabled, but the UART port is still accessible. The power
consumption in this case is very low.
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