Siemens MC45 Manual page 24

MC45 Hardware Interface Description
P R E L I M I N A R Y
Mode Function
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
module is detached from GSM network. Limited number of AT commands is
accessible. There are several ways to launch Charge-only mode:
· From POWER DOWN mode: Connect charger to the POWER pin of MC45
· From Normal mode: Connect charger to the POWER pin of MC45, then
Charge mode Normal operation (SLEEP, IDLE, TALK, GPRS IDLE, GPRS DATA) and
during normal charging running in parallel. Charge mode changes to Charge-only mode when
operation the module is powered down before charging has been completed.
See Table 10 and Table 12 for the various options of waking up MC45 and proceeding from one mode
to another.
MC45_HD_01_V00.02a
when engine was powered down by AT^SMSO.
enter AT^SMSO.
Page 24 of 90 12.08.2002