User's Manual

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2） U6300 offers a power input pin named VCOIN for backup battery. The anode of the battery connects to VCOIN,
and the cathode puts to earth.. While U6300 being powered off, the backup battery will power the real time clock,
the Crystal Oscillator Circuit and the SMPL timer. And while U6300 being powered on, the battery will be charged
up. The voltage offered by battery must be less than 3.6V.
For only keeping the SMPL (Sudden momentary power losing) timer while Sudden momentary power losing, a
capacitor can be used inside of battery. And the correlativity between the capacitance and the holding time is listed in
table 2.16.
Table 2.16 the correlativity between the capacitance and the holding time
The capacitance The Packaging (X5R) The holding time
1.5uF 0805 0.5
3.3uF 0805 1.0
4.7uF 0805 1.5
6.8uF 1206 2.0
3） KPD_PWR_N is used for power on U6300 module. And U6300 will be start-up just by putting the KPD_PWR_N
to earth.
4） EXT_RST_N is used for reset the U6300 module. And U6300 will be reseted just by putting the KPD_PWR_N to
earth.
5） U6300 supplies one ADC channel
AUXADC1, which can be used to detect some external analog signal, such as
battery voltage, temperature and so on. The voltage range of the
AUXADC1 is : 0～2.6V
Notes：* Only support on LCT_U6300_001
The device does not operate at temperatures below -20°
3. U6300 key features
The U6300 module has features such as internet access, SMS, GPS, phone book and audio. The features are described
in following sections. For detail information about AT commands, please make refers to the related documents.
3.1 Internet access
AT commands can be used for querying/setting the network band, selecting network mode, setting the network search
mode, setting register mode, querying network signal strength, setting APN and so on. The related AT commands are