User Guide

FM radio

The FM radio circuitry is implemented using a highly integrated radio TEA5761UK. The MCU SW controls the

FM radio circuitry through I2C interface.

The analogue single ended stereo output, VAFL and VAFL, are fed to the Retu’s MIC3 microphone input through

100nF capacitors.

The antenna of the FM Radio is created with the headset. The wires of the headset are used as poles of the

antenna.

Camera

The device uses 2MP SMIA camera module. 2MP SMIA is 2Mpixel camera with sensor resolution of 1600 x 1200.

Backup battery

When the main battery is not attached EM ASIC (N2200) goes in backup mode using back-up battery that

supplies voltage to RTC in EM ASIC (N2200).

CBUS interface

CBUS is a "main" system control bus in BB5.0. RAP controls the functionality of EM ASIC (N2200) and EM ASIC

(N2300) ASICs with CBUS.

CBUS is a four-wire half-duplex master-slave interface. In BB5.0 CBUS clock frequency is 2.4 MHz.

FBUS

USB and FBUS have multiplexed interface between EM ASIC (2300) and RAP.

RM-86

System Module Nokia Customer Care

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