Nokia RM-313 Service Manual

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Contents

Nokia RM-313 Service Manual Manual pdf 182 page image

Battery interfaceThe device uses BP-6MT Battery with TABBY interface. There are two manufacturers for BP-6MT Batteries andthey have different discharge curves; SW recognizes battery manufacturer from BSI resistor value (27k or82k).ChargingCharging is controlled by different blocks depending on the situation: If battery is totally empty, the chargingis controlled by CHACON block in N2300 and the battery is first charged with constant current until the voltagerises above certain limit (VMSTR+). Then the digital part of N2300 takes care of the charging and PWM chargingis 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, andconstant current mode is practically never used.Camera interfacesCamera systemThe 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. Themain camera and flash driver is connected to the camera processor. The front camera (second camera) isconnected to application processor and it shares the CCP-bus with the camera processor through switchesN5400 and 5401.Figure 47 Camera system block diagramMain camera characteristicsSensor type CMOSSensor photo detectors 5.0 million (2592 x 1944 pixels)F number/Aperture f/2.8RM-313System ModulePage 6 –18 COMPANY CONFIDENTIAL Issue 1Copyright © 2007 Nokia. All rights reserved.