EES3 Hardware Interface Description
3.5 Charging Control
71
EES3_HD_v01.100b
Page 46 of 118
2009-08-12
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 EES3 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 EES3 is
•
in Power-down mode
•
in Normal mode: Connect charger
to the VCHARGE line, then enter
AT^SMSO.
Note: While trickle charging is in
progress, be sure that the host applica-
tion is switched off. If the application is
fed from the trickle charge current the
module might be prevented from pro-
ceeding to software controlled charging
since the current would not be suffi-
cient.
•
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.
