Table of Contents
Introduction............................................................................................................................................................8–5
Block diagram....................................................................................................................................................8–5
Energy management..............................................................................................................................................8–7
Battery and interface........................................................................................................................................8–7
Normal and extreme voltages.........................................................................................................................8–7
Power key and system power-up....................................................................................................................8–8
Modes of operation...........................................................................................................................................8–8
Power distribution............................................................................................................................................8–9
Clocking scheme................................................................................................................................................8–9
USB, SIM, MMC.......................................................................................................................................................8–10
USB....................................................................................................................................................................8–10
SIM interface....................................................................................................................................................8–10
µSD card interface...........................................................................................................................................8–11
Camera...................................................................................................................................................................8–11
Camera.............................................................................................................................................................8–11
User interface........................................................................................................................................................8–12
Display interface..............................................................................................................................................8–12
Keyboard and side keys..................................................................................................................................8–12
Backlight and illumination.............................................................................................................................8–13
Audio concept.......................................................................................................................................................8–14
Audio hardware architecture.........................................................................................................................8–14
Internal microphone.......................................................................................................................................8–15
External microphone.......................................................................................................................................8–16
Internal earpiece.............................................................................................................................................8–16
Internal speaker..............................................................................................................................................8–17
External earpiece.............................................................................................................................................8–17
Vibra circuitry..................................................................................................................................................8–18
Pop-portTM connector....................................................................................................................................8–18
Bluetooth and FM radio.......................................................................................................................................8–19
Bluetooth.........................................................................................................................................................8–19
FM radio............................................................................................................................................................8–20
RF description.......................................................................................................................................................8–21
Introduction to receiver functionality...........................................................................................................8–21
WCDMA receiver functionality........................................................................................................................8–21
GSM receiver functionality..............................................................................................................................8–21
Introduction to transmitter functionality.....................................................................................................8–21
WCDMA transmitter functionality..................................................................................................................8–21
GSM transmitter functionality........................................................................................................................8–22
Frequency synthesizers..................................................................................................................................8–23
Regulators........................................................................................................................................................8–23
List of Tables
Table 16 Nominal voltages....................................................................................................................................8–7
Table 17 Pop-PortTMpin and signal table..........................................................................................................8–18
List of Figures
Figure 55 Block diagram........................................................................................................................................8–6
Figure 56 Battery pin order...................................................................................................................................8–7
RM-123; RM-145
System Module Nokia Customer Care
Issue 1 COMPANY CONFIDENTIAL Page 8 –3
Copyright © 2006 Nokia. All rights reserved.
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