Specifications

XT55 Hardware Interface Description
Confidential / Preliminary
s
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XT55_hd_v00.02 Page 33 of 116 17.03.2004
If the charger is connected to the GSM_POWER line when GSM/GPRS part of the XT55 is
in ALARM mode charging will start, while XT55 stays in ALARM mode. See also Chapter 3.7
which summarizes the various options of changing the mode of operation.
If your host application uses the GSM_SYNC pin to control a status LED as described in
Chapter 3.12.2.2, please note that the LED is off while the GSM engine is in Alarm mode.