User Guide

Table of Contents
Baseband description...................................................................................................................................................................9–7
System module block diagram............................................................................................................................................9–7
Baseband functional description........................................................................................................................................9–7
Absolute maximum ratings..................................................................................................................................................9–9
Modes of operation.................................................................................................................................................................9–9
Power distribution................................................................................................................................................................9–12
Clocking scheme.....................................................................................................................................................................9–14
Bluetooth..................................................................................................................................................................................9–15
USB..............................................................................................................................................................................................9–15
SIM interface............................................................................................................................................................................9–15
RS MMC interface....................................................................................................................................................................9–16
Battery interface....................................................................................................................................................................9–17
Camera interface....................................................................................................................................................................9–18
User interface..........................................................................................................................................................................9–19
Display interface...............................................................................................................................................................9–19
Keyboard.............................................................................................................................................................................9–20
Display and keyboard backlight..................................................................................................................................9–20
ALS interface......................................................................................................................................................................9–20
ASICs...........................................................................................................................................................................................9–21
RAP3G ASIC.........................................................................................................................................................................9–21
Retu EM ASIC......................................................................................................................................................................9–21
Tahvo EM ASIC...................................................................................................................................................................9–22
Device memories...................................................................................................................................................................9–22
RAP3G memories NOR flash and SDRAM...................................................................................................................9–22
Combo memory (Helen 3).............................................................................................................................................9–22
Audio concept...............................................................................................................................................................................9–22
Audio HW architecture.........................................................................................................................................................9–22
Internal microphone.............................................................................................................................................................9–23
External microphone............................................................................................................................................................9–24
Internal earpiece....................................................................................................................................................................9–24
Internal speaker.....................................................................................................................................................................9–25
External earpiece...................................................................................................................................................................9–25
Vibra circuitry..........................................................................................................................................................................9–26
Pop-portTM connector.........................................................................................................................................................9–26
Baseband technical specifications.........................................................................................................................................9–28
External interfaces.................................................................................................................................................................9–28
ACI interface electrical characteristics.............................................................................................................................9–28
VOUT electrical characteristics...........................................................................................................................................9–29
USB IF electrical characteristics.........................................................................................................................................9–29
FBUS interface electrical characteristics.........................................................................................................................9–30
Headset hook detection interface (XMICN) electrical characteristics....................................................................9–30
Audio signal electrical characteristics.............................................................................................................................9–30
SIM IF connections.................................................................................................................................................................9–31
RS MMC interface connections...........................................................................................................................................9–31
Charger connector and charging interface connections & electrical characteristics.......................................9–32
Battery connector and interface connections & electrical characteristics...........................................................9–33
Internal interfaces.................................................................................................................................................................9–33
UI module connector and IF connections......................................................................................................................9–34
Keyboard interface electrical characteristics................................................................................................................9–35
Display connector and interface connections...............................................................................................................9–36
RM-1
System Module Nokia Customer Care
Issue 1 Company Confidential Page 9–3
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