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Table Of Contents

RH-25

System Module CCS Technical Documentation

Page 2 ©Nokia Corporation Confidential Issue 1 10/2003

Contents

Page No

Introduction.................................................................................................................... 4

BB Hardware Characteristics ......................................................................................4

Technical Summary .....................................................................................................4

Functional Description .................................................................................................5

Modes of Operation................................................................................................... 5

RH-25 BB Functional Blocks ......................................................................................6

UEM and UPP........................................................................................................... 7

Battery ....................................................................................................................... 8

Charger Detection ................................................................................................... 11

Charger Interface Protection ................................................................................... 11

LED Driver Circuit.................................................................................................. 12

LCD Display ........................................................................................................... 13

RF Interface Block .................................................................................................. 14

Combo Memory Module......................................................................................... 14

Combo Memory Interface ....................................................................................... 14

SRAM Memory Description................................................................................... 14

Flash Memory Description...................................................................................... 14

Flash Architecture ................................................................................................... 15

Keyboard (UI Module)............................................................................................ 15

Keyboard ESD Protection ....................................................................................... 15

Internal Audio ......................................................................................................... 15

External Audio Connector....................................................................................... 17

External Microphone Connection ........................................................................... 18

External Earphone Connection................................................................................ 18

IrDa Interface .......................................................................................................... 19

Vibra........................................................................................................................ 19

FM Radio................................................................................................................. 19

System Connector (Tomahawk).............................................................................. 20

PWB Strategy ............................................................................................................21

PWB Construction................................................................................................... 21

PWB Immunity ....................................................................................................... 22

Keyboard................................................................................................................. 22

Audio Lines............................................................................................................. 22

Microphone Lines ................................................................................................... 22

EAR Lines............................................................................................................... 23

Charger Lines .......................................................................................................... 23

HEADINT............................................................................................................... 23

Battery Supply Filtering.......................................................................................... 23

System Connector ................................................................................................... 23

Mechanical Shielding.............................................................................................. 23

EMC Strategy ............................................................................................................23

Test Interfaces ............................................................................................................24

Production / After Sales Interface........................................................................... 24

Flash Interface......................................................................................................... 25

FBUS Interface........................................................................................................ 25

BB_RF Interface Connections ...................................................................................26