User's Manual

GSM/GPRS/GNSS Module Series
MC60 Hardware Design
MC60_Hardware_Design Confidential / Released 34 / 99
3.4. Operating Modes
3.4.1. Operating Modes of GSM Part
The table below briefly summarizes the various operating modes of GSM part mentioned in the following
chapters.
Table 9: Operating Modes Overview of GSM Part
Modes Function
GSM Normal
Operation
GSM/GPRS
Sleep
After enabling sleep mode by AT+QSCLK=1, the GSM part will
automatically enter into Sleep Mode if DTR is set to high level
and there is no interrupt (such as GPIO interrupt or data on
UART port). In this case, the current consumption of the GSM
part will reduce to the minimal level.
During Sleep Mode, the GSM part can still receive paging
message and SMS from the system normally.
GSM IDLE
Software is active. The GSM part has registered on GSM
network, and it is ready to send and receive GSM data.
GSM TALK
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.
GPRS IDLE
The GSM part is not registered on GPRS network. It is not
reachable through GPRS channel.
GPRS
STANDBY
The GSM part is registered on GPRS network, but no GPRS
PDP context is active. The SGSN knows the Routing Area
where the module is located at.
GPRS READY
The PDP context is active, but no data transfer is ongoing. The
GSM part is ready to receive or send GPRS data. The SGSN
knows the cell where the module is located at.
GPRS DATA
There is GPRS data in transfer. In this mode, power
consumption is decided by the PCL, working RF band and
GPRS multi-slot configuration.
POWER DOWN
Normal shutdown by sending the AT+QPOWD=1 command or using the
PWRKEY pin. The power management ASIC disconnects the power supply from
the base band part of the GSM part. 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 GSM part to a minimum functionality mode
without removing the power supply. In this case, the RF part of the GSM part 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