User Guide
Table of Contents
Baseband description ............................................................................................................................................9–5
System module block diagram ........................................................................................................................9–5
Baseband functional description.....................................................................................................................9–5
Absolute maximum ratings..............................................................................................................................9–6
Phone modes of operation...............................................................................................................................9–6
Power distribution............................................................................................................................................9–7
Clocking scheme................................................................................................................................................9–8
IrDA .....................................................................................................................................................................9–9
USB......................................................................................................................................................................9–9
Hall sensor..........................................................................................................................................................9–9
SIM interface ................................................................................................................................................... 9–10
Battery interface............................................................................................................................................. 9–11
MicroSD interface............................................................................................................................................ 9–11
Camera interface ............................................................................................................................................ 9–12
Bluetooth ........................................................................................................................................................ 9–12
WLAN ............................................................................................................................................................... 9–15
WLAN BB/MAC.................................................................................................................................................. 9–15
User interface.................................................................................................................................................. 9–16
Display interface........................................................................................................................................ 9–16
Display and keyboard backlight .............................................................................................................. 9–16
ALS interface .............................................................................................................................................. 9–17
ASICs................................................................................................................................................................. 9–18
RAP ASIC...................................................................................................................................................... 9–18
EM ASIC N2200 ........................................................................................................................................... 9–18
EM ASIC N2300 ........................................................................................................................................... 9–19
Device memories............................................................................................................................................ 9–19
RAP3GS memory POP2 stacked NOR flash and DDRAM .......................................................................... 9–19
Combo memory......................................................................................................................................... 9–19
Audio concept...................................................................................................................................................... 9–19
Audio HW architecture................................................................................................................................... 9–19
Internal microphone...................................................................................................................................... 9–20
External microphone...................................................................................................................................... 9–21
Internal earpiece............................................................................................................................................ 9–22
Internal speaker ............................................................................................................................................. 9–22
External earpiece............................................................................................................................................ 9–22
Vibra circuitry ................................................................................................................................................. 9–23
Pop-portTM connector ................................................................................................................................... 9–23
Baseband technical specifications..................................................................................................................... 9–24
External interfaces ......................................................................................................................................... 9–24
VOUT electrical characteristics ...................................................................................................................... 9–25
SIM IF connections.......................................................................................................................................... 9–25
Charger connector and charging interface connections & electrical characteristics .............................. 9–25
Battery interface............................................................................................................................................. 9–26
Internal interfaces.......................................................................................................................................... 9–27
Display connector and interface connections ............................................................................................. 9–27
Back-up battery interface electrical characteristics.................................................................................... 9–28
RF description ...................................................................................................................................................... 9–29
Introduction to receiver functionality.......................................................................................................... 9–29
WCDMA receiver.............................................................................................................................................. 9–29
GSM receiver.................................................................................................................................................... 9–29
RM-208
System Module Nokia Customer Care
Issue 1 COMPANY CONFIDENTIAL Page 9 –3
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