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

Issue 1

Table of Contents

COMPANY CONFIDENTIAL

Nokia Customer Care

Page 9 -3

Table of Contents