Operating Modes During Charging - Siemens TC65 Hardware Interface Description

TC65 Hardware Interface Description
Strictly confidential / Draft
3.5.7

Operating Modes during Charging

Of course, the battery can be charged regardless of the engine's operating mode. When the
GSM module is in Normal mode (SLEEP, IDLE, TALK, GPRS IDLE or GPRS DATA mode), it
remains operational while charging is in progress (provided that sufficient voltage is applied).
The charging process during the Normal mode is referred to as Charge mode .
If the charger is connected to the charger input of the external charging circuit and the
module's VCHARGE pin while TC65 is in Power-down mode, TC65 goes into Charge-only
mode.
While the charger remains connected it is not possible to switch the module off by using the
AT^SMSO command or the automatic shutdown mechanism. Instead the following applies:
•
If the module is in Normal mode and the charger is connected (Charge mode) the
AT^SMSO command causes the module to shut down shortly and then start into the
Charge-only mode.
•
In Charge-only mode the AT^SMSO command is not usable.
•
In Charge-only mode the module neither switches off when the battery or the module
exceeds the critical limits of overtemperature or undertemperature.
In these cases you can only switch the module off by disconnecting the charger.
To proceed from Charge-only mode to another operating mode you have the following
options:
•
To switch from Charge-only mode to Normal mode drive the ignition line (IGT) to ground
for 1 second.
•
To switch from Charge-only mode to Airplane mode enter the command
AT^SCFG=MEopMode/Airplane,on .
•
If AT^SCFG=MEopMode/Airplane/OnStart,on is set, driving the ignition line (IGT)
activates the Airplane mode.
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24.05.2005