Table of Contents
Block diagram.........................................................................................................................................................6–5
System module block diagram ........................................................................................................................6–5
Functional description......................................................................................................................................6–5
Baseband description ............................................................................................................................................6–5
UPPCosto ...........................................................................................................................................................6–5
LITTI ....................................................................................................................................................................6–6
Modes of operation...........................................................................................................................................6–6
Audio function description...............................................................................................................................6–6
External audio connector .................................................................................................................................6–7
External signals and connections ....................................................................................................................6–8
Interfaces ................................................................................................................................................................6–9
RF/BB Interface..................................................................................................................................................6–9
LCD interface ......................................................................................................................................................6–9
Keyboard ......................................................................................................................................................... 6–10
SIM interface ................................................................................................................................................... 6–12
Battery connector........................................................................................................................................... 6–13
Battery BL-5C................................................................................................................................................... 6–13
PWB outline .................................................................................................................................................... 6–14
RF description ...................................................................................................................................................... 6–14
Frequency band, power and multi-slot class............................................................................................... 6–14
Transmitter Architecture Description .......................................................................................................... 6–14
Digitally Controlled X-tal Oscillator .............................................................................................................. 6–15
List of Tables
Table 6 Connector for External Audio Accessories ..............................................................................................6–8
Table 7 System connector .....................................................................................................................................6–8
Table 8 SIM interface........................................................................................................................................... 6–12
Table 9 Battery IF ................................................................................................................................................ 6–13
Table 10 Frequency bands and TX power class................................................................................................ 6–14
List of Figures
Figure 80 Module block diagram ..........................................................................................................................6–5
Figure 81 Audio block diagram.............................................................................................................................6–7
Figure 82 4-pole jack plug for audio accessory...................................................................................................6–8
Figure 83 RF/BB Interface......................................................................................................................................6–9
Figure 84 Keyboard schematics ......................................................................................................................... 6–11
Figure 85 SIM interface block diagram.............................................................................................................. 6–13
Figure 86 BL-5C battery block ............................................................................................................................ 6–13
Figure 87 PWB top side component placement............................................................................................... 6–14
RM-305; RM-306
System module
Issue 2 COMPANY CONFIDENTIAL Page 6 –3
Copyright © 2007 Nokia. All rights reserved.
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