Table of Contents
Baseband description............................................................................................................................................9–7
System module block diagram........................................................................................................................9–7
Baseband functional description.....................................................................................................................9–8
Absolute maximum ratings..............................................................................................................................9–8
Phone modes of operation...............................................................................................................................9–8
Power distribution..........................................................................................................................................9–10
Clocking scheme..............................................................................................................................................9–11
Bluetooth.........................................................................................................................................................9–12
FM radio............................................................................................................................................................9–12
USB....................................................................................................................................................................9–13
SIM interface....................................................................................................................................................9–13
IrDA interface...................................................................................................................................................9–14
SD card interface.............................................................................................................................................9–14
WLAN interface................................................................................................................................................9–14
Battery interface..............................................................................................................................................9–14
Camera interfaces............................................................................................................................................9–14
Back camera interface...............................................................................................................................9–14
Camera construction..................................................................................................................................9–15
Flash LED.....................................................................................................................................................9–15
Front camera..............................................................................................................................................9–16
User interface..................................................................................................................................................9–17
Main flexi..........................................................................................................................................................9–17
Slide position sensor.......................................................................................................................................9–17
Keyboards........................................................................................................................................................9–18
Display interface..............................................................................................................................................9–20
Display and keyboard backlight.....................................................................................................................9–20
ALS interface....................................................................................................................................................9–21
ASICs.................................................................................................................................................................9–22
RAP ASIC.......................................................................................................................................................9–22
EM ASIC N2200............................................................................................................................................9–22
EM ASIC N2300............................................................................................................................................9–22
Device memories.............................................................................................................................................9–23
RAP memories NOR flash and SDRAM.......................................................................................................9–23
Combo memory..........................................................................................................................................9–23
Audio concept.......................................................................................................................................................9–23
Audio HW architecture....................................................................................................................................9–23
Internal microphone.......................................................................................................................................9–24
External microphone.......................................................................................................................................9–24
Internal earpiece.............................................................................................................................................9–25
Internal speaker..............................................................................................................................................9–25
External earpiece.............................................................................................................................................9–26
Vibra circuitry..................................................................................................................................................9–26
System connector............................................................................................................................................9–27
Baseband technical specifications......................................................................................................................9–28
External interfaces..........................................................................................................................................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 (between RAP and N2300)....................................................9–30
RM-91; RM-92
System Module Nokia Customer Care
Issue 1 COMPANY CONFIDENTIAL Page 9 –3
Copyright © 2006 Nokia. All rights reserved.
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