User Guide

Figure 90 Bluetooth interfaces

FM radio

The FM radio is an integrated circuit which is in combined BTHFM module with Bluetooth chip, controlled by

MCU software through a serial bus interface. The wires of the headset are used as poles of the antenna, and

no other antenna is needed for FM radio reception.

The antenna for the FM radio is provided by plugging in an external wired headset to the system connector.

It is not possible to listen to the FM radio without a wired headset connected. The FM radio is controlled by

I2C commands from RAP. The audio output of the FM radio is fed to the headset via AVILMA EM ASIC N2200

and analog switch, so the rest of the phone can sleep while the FM radio is active.

RM-100

Nokia Customer Care System Module

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