EES3 Hardware Interface Description
3.1 Operating Modes
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EES3_HD_v01.100b
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2009-08-12
Confidential / Released
3.1
Operating Modes
The table below briefly summarizes the various operating modes referred to in the following
chapters.
for the various options proceeding from one mode to another.
Table 7:
Overview of operating modes
Normal operation GSM / GPRS SLEEP Various power save modes set with AT+CFUN command.
Software is active to minimum extent. If the module was
registered to the GSM network in IDLE mode, it is registered
and paging with the BTS in SLEEP mode, too. Power sav-
ing can be chosen at different levels: The NON-CYCLIC
SLEEP mode (AT+CFUN=0) disables the AT interface. The
CYCLIC SLEEP modes AT+CFUN=7 and 9 alternatingly
activate and deactivate the AT interfaces to allow perma-
nent access to all AT commands.
GSM IDLE
Software is active. Once registered to the GSM network,
paging with BTS is carried out. The module is ready to send
and receive.
GSM TALK
Connection between two subscribers is in progress. Power
consumption depends on network coverage individual set-
tings, such as DTX off/on, FR/EFR/HR, hopping
sequences, antenna.
GPRS IDLE
EGPRS IDLE
Module is ready for GPRS data transfer, but no data is cur-
rently sent or received. Power consumption depends on
network settings and GPRS configuration (e.g. multislot set-
tings).
GPRS DATA
EGPRS DATA
GPRS data transfer in progress. Power consumption
depends on network settings (e.g. power control level),
uplink / downlink data rates, GPRS configuration (e.g. used
multislot settings) and reduction of maximum output power.
POWER DOWN
Normal shutdown after sending the AT^SMSO command.
Only a voltage regulator is active for powering the RTC. Software is not active.
Interfaces are not accessible.
Operating voltage (connected to BATT+) remains applied.
Airplane mode
Airplane mode shuts down the radio part of the module, causes the module to log
off from the GSM/GPRS network and disables all AT commands whose execution
requires a radio connection.
Airplane mode can be controlled by using the AT commands AT^SCFG and
AT+CALA:
•
With AT^SCFG=MEopMode/Airplane/OnStart the module can be configured to
enter the Airplane mode each time when switched on or reset.
•
The parameter AT^SCFG=MEopMode/Airplane can be used to switch back
and forth between Normal mode and Airplane mode any time during operation.
•
Setting an alarm time with AT+CALA followed by AT^SMSO wakes the module
up into Airplane mode at the scheduled time.
Charge-only
mode
Limited operation for battery powered applications. Enables charging while module
is detached from GSM network. Limited number of AT commands is accessible.
Charge-only mode applies when the charger is connected if the module was pow-
ered down with AT^SMSO.
Charge mode
during normal
operation
Normal operation (SLEEP, IDLE, TALK, GPRS/EGPRS IDLE, GPRS/EGPRS
DATA) and charging running in parallel. Charge mode changes to Charge-only
mode when the module is powered down before charging has been completed.
