User Guide

CCS Technical Documentation System Module and User Interface
NSB-9
Issue 1 04/03 Nokia Corporation Page 13
Baseband External and Internal Signals and Connections
This section describes the external and internal electrical connection and interface levels
on the baseband. Electrical interface specifications are collected into tables that covers a
connector or a defined interface.
Internal Signals and Connections
Table 6: FM Radio Interface
BB Signal
FM Radio
Signal
Min Nom Max Condition Note
VFLASH2 VCC 2.7V 2.78 V 2.86V Analog supply voltage
6.0mA 8.4mA 10.5mA Operational
3uA 6uA Stand by
VDIG 2.7V 2.78V 2.86V Digital supply voltage
2.1mA 3.0mA 3.9mA Operational
11uA 19uA 26uA Stand by
(bus enable
LOW)
GenIO(3) FMClk 1.4V
0
1.8V 1.88V
0.4V
High
Low
Reference clock for
FM radio module
Also 6.5MHz or
13MHz can be used
32kHz Frequency
GenIO(8) FMWrEn 1.4V
0V
1.8V 1.88V
0.4V
High
Low
Write Enable
GenIO(11) FMCtrlClk 1.4V
0
1.8V 1.88V
0.4V
High
Low
max. 1MHz
GenIO(12) FMCtrlDa 1.4V
0
1.8V 1.88V
0.4V
High
Low
Bidirectional
FMANT f
FM(ant)
76MHz 108MHz FM input frequency.
Headset used as an
antenna.
FM_RADIO R VAFR 720mV 850mV 940mV f
RF
=98MHz,
V
RF
=1mV
FM-radio output sig-
nal (right) to amplifier
input
FM_RADIO L VAFL 720mV 850mV 940mV f
RF
=98MHz,
V
RF
=1mV
FM-radio output sig-
nal (left) to amplifier
input