Baseband description....................................................................................................................................................................9-7

System module block diagram.............................................................................................................................................9-7

Baseband functional description.........................................................................................................................................9-8

Absolute maximum ratings.................................................................................................................................................9-10

Phone modes of operation..................................................................................................................................................9-10

Power distribution.................................................................................................................................................................9-14

Clocking scheme......................................................................................................................................................................9-16

Bluetooth...................................................................................................................................................................................9-17

USB...............................................................................................................................................................................................9-17

SIM interface.............................................................................................................................................................................9-17

RS MMC interface.....................................................................................................................................................................9-18

Battery interface.....................................................................................................................................................................9-19

Camera interface.....................................................................................................................................................................9-19

User interface...........................................................................................................................................................................9-20

Display interface................................................................................................................................................................9-20

Keyboard..............................................................................................................................................................................9-22

Display and keyboard backlight...................................................................................................................................9-24

ALS interface.......................................................................................................................................................................9-24

ASICs............................................................................................................................................................................................9-25

RAP3G ASIC..........................................................................................................................................................................9-25

Retu EM ASIC.......................................................................................................................................................................9-25

Tahvo EM ASIC.....................................................................................................................................................................9-26

Device memories.....................................................................................................................................................................9-26

RAP3G memories NOR flash and SDRAM....................................................................................................................9-26

Combo memory.................................................................................................................................................................9-26

Audio concept................................................................................................................................................................................9-26

Audio HW architecture..........................................................................................................................................................9-26

Internal microphone..............................................................................................................................................................9-27

External microphone.............................................................................................................................................................9-27

Internal earpiece.....................................................................................................................................................................9-28

Internal speaker......................................................................................................................................................................9-28

External earpiece....................................................................................................................................................................9-29

Pop-portTM connector...........................................................................................................................................................9-30

Baseband technical specifications..........................................................................................................................................9-31

External interfaces..................................................................................................................................................................9-31

ACI interface electrical characteristics..............................................................................................................................9-31

VOUT electrical characteristics............................................................................................................................................9-32

USB IF electrical characteristics..........................................................................................................................................9-32

FBUS interface electrical characteristics..........................................................................................................................9-33

Headset hook detection interface (XMICN) electrical characteristics.....................................................................9-34

Audio signal electrical characteristics..............................................................................................................................9-34

SIM IF connections..................................................................................................................................................................9-34

RS MMC interface connections.............................................................................................................................................9-35

Charger connector and charging interface connections & electrical characteristics........................................9-35

Battery connector and interface connections & electrical characteristics............................................................9-36

Internal interfaces..................................................................................................................................................................9-36

Keyboard connector...............................................................................................................................................................9-37

Keyboard interface electrical characteristics.................................................................................................................9-38

Fold unit connector................................................................................................................................................................9-39

Camera interface connections and electrical characteristics....................................................................................9-41

9241872 (Issue 1)

Table of Contents

Company Confidential

Nokia Customer Care

Page 9-3

Table of Contents