User Guide

CCS Technical Documentation System Module and User Interface
Company confidential RH-20
Issue 1 10/2003 Nokia Corporation. Page 29
FM Radio
The FM radio in the transceiver RH-20 is a single chip electronically tuned FM stereo
radio with fully integrated IF selectivity and demodulation. The FM radio is completely
adjustment free.
It can be tuned the European, US and Japanese FM bands.
The channel tuning and bus data are controlled by UPP. A variable capacitance diode,
two coils and some resistors and capacitors are the external components for the FM
radio.
The audio frequency is fed via UEM to a headset of the phone. The FM radio antenna is
implemented in a cable of the headset.
Figure 6: FM radio
UPP8M
TEA5767
FMClk
FMCtrlDa
FMCtrlClk
FMWrEn
VIO
W/R
SCL
SDA
XTAL2
GenIO(3)
GenIO(12)
GenIO(8)
GenIO(11)