User Guide

Table of Contents
Baseband description....................................................................................................................................................................1–7
System module block diagram.............................................................................................................................................1–7
Baseband functional description.........................................................................................................................................1–8
Absolute maximum ratings.................................................................................................................................................1–10
Phone modes of operation..................................................................................................................................................1–10
Power distribution.................................................................................................................................................................1–14
Clocking scheme......................................................................................................................................................................1–16
Bluetooth/FM module............................................................................................................................................................1–17
USB...............................................................................................................................................................................................1–17
SIM interface.............................................................................................................................................................................1–17
RS MMC interface.....................................................................................................................................................................1–18
Battery interface.....................................................................................................................................................................1–19
Camera interfaces...................................................................................................................................................................1–19
Back camera.......................................................................................................................................................................1–19
Camera construction........................................................................................................................................................1–20
Back camera slider detection switch..........................................................................................................................1–22
Flash LED..............................................................................................................................................................................1–23
Front camera......................................................................................................................................................................1–24
User interface...........................................................................................................................................................................1–25
Display interface................................................................................................................................................................1–25
Keyboard..............................................................................................................................................................................1–26
Display and keyboard backlight...................................................................................................................................1–28
ALS interface.......................................................................................................................................................................1–29
ASICs............................................................................................................................................................................................1–30
RAP3G ASIC..........................................................................................................................................................................1–30
Retu EM ASIC.......................................................................................................................................................................1–30
Tahvo EM ASIC.....................................................................................................................................................................1–30
Device memories.....................................................................................................................................................................1–30
RAP3G memories NOR flash and SDRAM....................................................................................................................1–30
Combo memory.................................................................................................................................................................1–31
Audio concept................................................................................................................................................................................1–31
Audio HW architecture..........................................................................................................................................................1–31
Internal microphone..............................................................................................................................................................1–32
External microphone.............................................................................................................................................................1–32
Internal earpiece.....................................................................................................................................................................1–33
Internal speaker......................................................................................................................................................................1–33
External earpiece....................................................................................................................................................................1–34
Vibra circuitry...........................................................................................................................................................................1–34
Pop-portTM connector...........................................................................................................................................................1–35
Baseband technical specifications..........................................................................................................................................1–36
External interfaces..................................................................................................................................................................1–36
External interfaces............................................................................................................................................................1–36
ACI interface electrical characteristics........................................................................................................................1–36
VOUT electrical characteristics......................................................................................................................................1–37
USB IF electrical characteristics....................................................................................................................................1–37
FBUS interface electrical characteristics....................................................................................................................1–38
Headset hook detection interface (XMICN) electrical characteristics...............................................................1–38
Audio signal electrical characteristics........................................................................................................................1–39
SIM IF connections............................................................................................................................................................1–39
RS MMC interface connections.......................................................................................................................................1–39
RM-84/99
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