EGS5 Hardware Interface Description
3.5 Charging Control
75
EGS5_HD_v02.004
Page 47 of 123
2012-02-09
Confidential / Released
Table 12:
Comparison Charge-only and Charge mode
Mode
How to activate mode
Description of mode
Charge
mode
Connect charger to charger input of
host application charging circuit and
module’s VCHARGE line while EGS5 is
•
operating, e.g. in IDLE or TALK mode
•
in SLEEP mode
•
Battery can be charged while GSM module
remains operational and registered to the
GSM network.
•
In IDLE and TALK mode, the serial inter-
faces are accessible. All AT commands can
be used to full extent.
Note: If the module operates at maximum
power level (PCL5) and GPRS Class 12 at the
same time the current consumption is higher
than the current supplied by the charger.
Charge-
only
mode
Connect charger to charger input of
host application charging circuit and
module’s VCHARGE line while EGS5 is
•
in Power-down mode
•
in Normal mode: Connect charger
to the VCHARGE line, then enter
AT^SMSO.
Note: While trickle charging is in prog-
ress, be sure that the host application is
switched off. If the application is fed from
the trickle charge current the module
might be prevented from proceeding to
software controlled charging since the
current would not be sufficient.
•
Battery can be charged while GSM module
is deregistered from GSM network.
•
Charging runs smoothly due to constant
current consumption.
•
The AT interface is accessible and allows to
use the commands listed below.
