The device uses BP-6MT Battery with TABBY interface. There are two manufacturers for BP-6MT Batteries and
they have different discharge curves; SW recognizes battery manufacturer from BSI resistor value (27k or
Charging is controlled by different blocks depending on the situation: If battery is totally empty, the charging
is controlled by CHACON block in N2300 and the battery is first charged with constant current until the voltage
rises above certain limit (VMSTR+). Then the digital part of N2300 takes care of the charging and PWM charging
is done until PURX is released. After this SW starts to control the charging.
The device has Li-Ion battery, which has protection circuit that limits the lowest battery voltage to 2.8V, and
constant current mode is practically never used.
The device's camera system consists of camera processor, which is connected to the application processor.
The camera processor has external SDRAM and it used N5452 IC to control AF and mechanical shutter. The
main camera and flash driver is connected to the camera processor. The front camera (second camera) is
connected to application processor and it shares the CCP-bus with the camera processor through switches
N5400 and 5401.
Main camera characteristics
Sensor photo detectors
Page 6 –18
Figure 47 Camera system block diagram
5.0 million (2592 x 1944 pixels)
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