TC35i: Migration from TC35 to TC35i
PRELIMINARY
TC35_TC35i_MIG_01_V01.01 29.1.2003 Page 10 of 34
4.2 Operating Modes
Various operating modes for TC35 and TC35i modules are listed in the table below. TC35i
module supports four additional sleep modes compared to TC35. For further details please
consult the TC35i manual
The table below shows operating modes overview for both devices
Table 4-1: Operating modes
Mode Function TC35 TC35i
GSM SLEEP Power saving mode set with AT+CFUN
command. Software is active to minimum
extent. If the GSM engine was
registered to the GSM network in IDLE
mode, it is registered and paging in
SLEEP mode, too. AT interface is not
responding.
Software is active to a minimum extent. If the
module was registered to a GSM network in
IDLE mode, it remains, in SLEEP mode,
registered and pageable from the BTS.
Power saving can be chosen at different levels.
The NON_CYCLIC SLEEP mode (AT+CFUN=0)
disables the AT interface. The CYCLIC SLEEP
mode AT+CFUN=5, 6, 7 and 8 alternatingly
activate and deactivate the AT interface to
allow permanent 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.
Normal
operation
GSM TALK 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.
POWER DOWN Operating voltage is applied. Only a voltage regulator in the Power Supply ASIC is active
for powering the RTC. Software is not active. The RS-232 interface is not accessible.
Alarm mode Restricted operation launched by RTC alert function while the module is in Power Down
mode. Module will not be registered to GSM network. Limited number of AT commands is
accessible. If application is battery powered: No charging functionality in Alarm mode.
Charge-only
mode
Limited operation for battery powered applications. Enables charging while engine is
detached from GSM network. Limited number of AT commands is accessible. There are
several ways to launch Charge-only mode:
æ From Power Down mode: Connect charger to POWER lines when engine was powered
down by AT^SMSO.
æ From Normal mode: Connect charger to POWER lines, then enter AT^SMSO.
Charge mode
during normal
operation
Normal operation (SLEEP, IDLE, TALK, DATA) and charging running in parallel. Charge
mode changes to Charge-only mode when the module is powered down before charging
has been completed.
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