User Guide

ManualsBrandsNokia ManualsCell PhoneE50

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Table of Contents

Baseband description............................................................................................................................................9–7

System module block diagram........................................................................................................................9–7

Baseband functional description.....................................................................................................................9–7

Absolute maximum ratings..............................................................................................................................9–8

Phone modes of operation...............................................................................................................................9–8

Power distribution..........................................................................................................................................9–10

Clocking scheme..............................................................................................................................................9–11

Bluetooth.........................................................................................................................................................9–12

USB....................................................................................................................................................................9–12

Camera.............................................................................................................................................................9–12

IrDA...................................................................................................................................................................9–12

Backup battery................................................................................................................................................9–13

CBUS interface..................................................................................................................................................9–13

FBUS..................................................................................................................................................................9–13

ACI interface.....................................................................................................................................................9–13

VOUT interface.................................................................................................................................................9–13

Charger interface.............................................................................................................................................9–13

MicroSD interface.............................................................................................................................................9–14

SIM/USIM...........................................................................................................................................................9–15

Battery interface..............................................................................................................................................9–16

User interface..................................................................................................................................................9–17

Display interface.........................................................................................................................................9–17

Keyboard.....................................................................................................................................................9–17

Backlights....................................................................................................................................................9–18

Indicator LED...............................................................................................................................................9–19

ASICs.................................................................................................................................................................9–19

RAP ASIC.......................................................................................................................................................9–19

EM ASIC (N2200)..........................................................................................................................................9–19

EM ASIC (N2300)..........................................................................................................................................9–19

Device memories.............................................................................................................................................9–19

RAP memories NOR flash, NAND flash and DDR SDRAM..........................................................................9–19

Audio concept.......................................................................................................................................................9–20

Audio HW architecture....................................................................................................................................9–20

Internal microphone.......................................................................................................................................9–20

External microphone.......................................................................................................................................9–20

Internal earpiece.............................................................................................................................................9–21

Internal speaker..............................................................................................................................................9–21

External earpiece.............................................................................................................................................9–21

Vibra circuitry..................................................................................................................................................9–21

Baseband technical specifications......................................................................................................................9–22

RF-BB interfaces...............................................................................................................................................9–22

External interfaces..........................................................................................................................................9–26

System connector............................................................................................................................................9–26

ACI interface electrical characteristics...........................................................................................................9–27

VOUT electrical characteristics.......................................................................................................................9–28

CBUS connections and electrical characteristics..........................................................................................9–29

USB/FBUS connections and electrical characteristics...................................................................................9–29

Headset hook detection interface (XMICN) electrical characteristics.........................................................9–30

Audio signal electrical characteristics...........................................................................................................9–30

MicroSD IF electrical signal characteristics...................................................................................................9–30

RM-170; RM-171

System Module Nokia Customer Care

Issue 1 COMPANY CONFIDENTIAL Page 9 –3