MC52i AT Command Set

MC52i AT Command Set
18.3 AT^SBC
^SBC: Undervoltage
The message will be reported, for example, when the user attempts to set up a call while the voltage is close to
the critical limit and further power loss is caused during the transmit burst. When the external charging circuit
includes an NTC connected to the BATT_TEMP pin, the URC appears several times before the module switches
off.
The undervoltage protection is also efficient in applications which are not battery operated, i.e. 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, MC52i will present the undervoltage URC only once and will then switch off without
sending any further messages.
Parameter Description
(num)
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
(num)
Battery capacity
0, 20, 40, 60, 80, 100 percent of remaining capacity (6 steps).
"0" indicates that either the battery is exhausted or the capacity value is not available. "100" indicates a remaining
capacity between 81 and 100 percent, "80" indicates 61 ... 81 percent, and so on.
While charging is in progress (charging adapter connected) the battery capacity is not available. Consequently,
parameter =0. To query the battery capacity disconnect the charger.
(num)
Average current consumption.
Value (0...5000) of average current consumption (mean value over a couple of seconds) in mA.
is obtained from the MC52i's current consumption, plus the value you have specified for the application
by using the write command AT^SBC=. Remember that the current consumption of MC52i varies
with its operating mode (IDLE, TALK, DATA, GPRS/DATA) and the power level.
If was not yet specified and no battery pack NTC is detected returns only the module's
present current consumption.
If was not yet specified, but the NTC of the connected battery pack is detected, an offset value of
200mA will be added by default. 200mA represents the assumed current consumption of a typical external application
connected to the MC52i. It is recommended that you enter the correct power consumption of your application
as described below.
(num)
0 (P) ...5000 Enter the current consumption of your host application in mA. This information
enables MC52i to correctly determine the end of charging and terminate charging
automatically when the battery is fully charged. If used, the current drawn
from the VDD pin of the module's application interface must be added, too.
When the MC52i is powered down or reset, the value of is
restored to its default. This affects the charging control and disables the presentation
of Unsolicited Result Codes. Therefore, the parameter should be set
every time when needed after rebooting the MC52i.
MC52i_ATC_V01.201 Page 504 of 551 4/16/10
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