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AC75 Hardware Interface Description
Strictly confidential / Preliminary
3.1
Operating Modes
The table below briefly summarizes the various operating modes referred to in the following
chapters.
Table 5: Overview of operating modes
Normal operation
GSM / GPRS SLEEP
GSM IDLE
GSM TALK
GPRS IDLE
EGPRS IDLE
GPRS DATA
EGPRS DATA
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.
AC75_HD_V00.202
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 saving can be chosen at different levels:
The
NON-CYCLIC
disables the AT interface. The CYCLIC SLEEP modes
AT+CFUN=7 and 9 alternatingly activate and deactivate
the AT interfaces to allow permanent access to all AT
commands.
Software is active. Once registered to the GSM
network, paging with BTS is carried out. The module is
ready to send and receive.
Connection between two subscribers is in progress.
Power consumption depends on network coverage
individual settings, such as DTX off/on, FR/EFR/HR,
hopping sequences, antenna.
Module is ready for GPRS/EGPRS data transfer, but no
data is currently sent or received. Power consumption
depends on network settings and GPRS/EGPRS
configuration (e.g. multislot settings).
GPRS/EGPRS data transfer in progress. Power
consumption depends on network settings (e.g. power
control level), uplink / downlink data rates, GPRS
configuration
(e.g.
reduction of maximum output power.
Page 22 of 120
s
SLEEP
mode
(AT+CFUN=0)
used
multislot
settings)
27.04.2006
and
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