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8 VRRTC: Power supply for SRAM and G2
Voltage 1.8 V
Current 30 µA max
Dropout 100 mV max (load max)
5.16. Battery Charging and Monitoring
5.16.1. Charging Current
The status of the LCD battery icon is determined by the value of VBATREG returned from IOTA, as indicated in the table:
3 bar
2 bar
1 bar
0 bar (Low voltage alarm)
The phone will be power down two minutes after generating a Low battery Alarm. The CPU within the phone controls Battery
charging. If external power is detected and the temperature is within specified limits, the charger starts the
rapid charge algorithm.
When the battery is fitted, the charging algorithm is determined by constant voltage and constant current control with time,
temperature and voltage safeguards. A current limit not greater than the maximum charge current for any battery option must
be provided by the external power source.
5.16.2. Deeply Discharged Batteries
In the case of deeply discharged batteries, there may not be enough power in the battery to initiate charging. In this case, the
charging circuit automatically starts to trickle charge the battery until there is enough power to switch on the phone.
5.17. Camera Module
The handset features an integrated CIF (352 x 288 pixels) size CMOS camera module.
The CMOS sensor includes:
8 Image Sensor Array (352 x 288 resolution)
8 Timing Generator
8 Analog Processing Block
8 A/C Converters
8 Output Formatter
8 Digital Video Port
8 SCCB Interface
Icon
Status Battery Pack
3.795 V <
3.727 V <
3.619 V <
3.53 V <
< 3.795 V
< 3.727 V
< 3.619 V
– 5-13 –
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