Table 10: Comparison Charge-Only And Charge Mode - Siemens AC75 Hardware Interface Description

AC75 Hardware Interface Description
Strictly confidential / Preliminary

Table 10: Comparison Charge-only and Charge mode

How to activate mode
Connect charger to charger input of host
application charging circuit and module's
VCHARGE pin while AC75 is
• operating, e.g. in IDLE or TALK mode
• in SLEEP mode
Connect charger to charger input of host
application charging circuit and module's
VCHARGE pin while AC75 is
• in Power-down mode
• in Normal mode: Connect charger to
the VCHARGE
AT^SMSO.
NOTE: While trickle charging is in
progress, be
application is
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.
AC75_HD_V00.202
pin, then enter
sure that the host
switched off. If the
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Description of mode
• Battery can be charged while GSM module
remains operational and registered to the
GSM network.
• In IDLE and TALK mode, the serial interfaces
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.
• Battery can be charged while GSM engine 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.
s
27.04.2006