User Guide

Table of Contents
Baseband description....................................................................................................................................................................9–7
System module block diagram.............................................................................................................................................9–7
Baseband functional description.........................................................................................................................................9–8
Absolute maximum ratings.................................................................................................................................................9–10
Phone modes of operation..................................................................................................................................................9–10
Power distribution.................................................................................................................................................................9–14
Clocking scheme......................................................................................................................................................................9–16
Bluetooth...................................................................................................................................................................................9–17
USB...............................................................................................................................................................................................9–17
SIM interface.............................................................................................................................................................................9–17
RS MMC interface.....................................................................................................................................................................9–18
Battery interface.....................................................................................................................................................................9–19
Camera interface.....................................................................................................................................................................9–19
User interface...........................................................................................................................................................................9–20
Display interface................................................................................................................................................................9–20
Keyboard..............................................................................................................................................................................9–22
Display and keyboard backlight...................................................................................................................................9–24
ALS interface.......................................................................................................................................................................9–24
ASICs............................................................................................................................................................................................9–25
RAP3G ASIC..........................................................................................................................................................................9–25
Retu EM ASIC.......................................................................................................................................................................9–25
Tahvo EM ASIC.....................................................................................................................................................................9–26
Device memories.....................................................................................................................................................................9–26
RAP3G memories NOR flash and SDRAM....................................................................................................................9–26
Combo memory.................................................................................................................................................................9–26
Audio concept................................................................................................................................................................................9–26
Audio HW architecture..........................................................................................................................................................9–26
Internal microphone..............................................................................................................................................................9–27
External microphone.............................................................................................................................................................9–27
Internal earpiece.....................................................................................................................................................................9–28
Internal speaker......................................................................................................................................................................9–28
External earpiece....................................................................................................................................................................9–29
Pop-portTM connector...........................................................................................................................................................9–30
Baseband technical specifications..........................................................................................................................................9–31
External interfaces..................................................................................................................................................................9–31
ACI interface electrical characteristics..............................................................................................................................9–31
VOUT electrical characteristics............................................................................................................................................9–32
USB IF electrical characteristics..........................................................................................................................................9–32
FBUS interface electrical characteristics..........................................................................................................................9–33
Headset hook detection interface (XMICN) electrical characteristics.....................................................................9–34
Audio signal electrical characteristics..............................................................................................................................9–34
SIM IF connections..................................................................................................................................................................9–34
RS MMC interface connections.............................................................................................................................................9–35
Charger connector and charging interface connections & electrical characteristics........................................9–35
Battery connector and interface connections & electrical characteristics............................................................9–36
Internal interfaces..................................................................................................................................................................9–36
Keyboard connector...............................................................................................................................................................9–37
Keyboard interface electrical characteristics.................................................................................................................9–38
Fold unit connector................................................................................................................................................................9–39
Camera interface connections and electrical characteristics....................................................................................9–41
RM-42
System Module Nokia Customer Care
9241872 (Issue 1) Company Confidential Page 9–3
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