Obile – Siemens MC55 User Manual
Page 431
MC55 AT Command Set
17.3 AT^SBC
s
m
obile
MC55_ATC_V01.05
Page 431 of 469
2/10/04
Confidential / Released
Unsolicited Result Code
^SBC: Undervoltage
The message will be reported, for example, when you attempt to set up a call while the voltage is close to the
critical limit and further power loss is caused during the transmit burst. To remind you that the battery needs to
be charged soon, the URC appears several times before the module switches off.
When the module is in IDLE mode it takes typically one minute to deregister from the network and to switch off.
Undervoltage protection depending on the presence of an NTC:
The undervoltage protection is also efficient in applications which are not battery operated, i.e. in applications
where no NTC is connected to the BATT_TEMP pin. To use this feature it is sufficient to issue the write command
which automatically enables the presentation of URCs. You do not need to specify
. Please note,
that in contrast to applications with an NTC, the ME will present the undervoltage URC only once and will then
switch off without sending any further messages.
Command Description
Use the write command to specify the power consumption of your external application. This information enables
the ME to calculate the average power consumption
and to properly control the charging process. If the
value is not correct the entire charging process may be affected. Resulting problems may be wrong responses
to the
read command, overcharging, or the battery does not reach full capacity.
The write command registers the serial port as the output channel for unsolicited result codes related to charging.
When the ME is powered down or reset, the value of
is restored to its default. This affects the charg-
ing control and disables the presentation of unsolicited result codes. Therefore, the parameter should be set
every time when needed after rebooting the ME.
Parameter Description
Connection status of battery pack
0
No charging adapter is connected
1
Charging adapter is connected
2
Charging adapter is connected, charging in progress
3
Charging adapter is connected, charging has finished
4
Charging error, charging is interrupted
5
False charging temperature, charging is interrupted while temperature is
beyond allowed range
PIN
ASC0
ASC1
MUX1
MUX2
MUX3
!
%
%
%
%
%
Reference(s)
SIEMENS
<bcs>
(num)