User Guide

Issue 1 12/04 COMPANY CONFIDENTIAL 3

RAE-6/RA-4

6 - Baseband Description and Troubleshooting Nokia Customer Care

Abbreviations ...................................................................................................... 7

Baseband Top-Level Description ...................................................................... 9

Operating conditions........................................................................................ 10

Absolute maximum ratings ............................................................................ 10

DC characteristics .......................................................................................... 11

Temperature conditions ................................................................................. 11

ESD immunity ................................................................................................ 11

Functional Description of CMT ........................................................................ 12

Interfaces between CMT and APE................................................................... 13

XBUS ............................................................................................................. 13

XABUS ........................................................................................................... 13

Functional Description of APE ........................................................................ 14

Audio................................................................................................................ 14

Audio control signals........................................................................................ 15

Audio modes.................................................................................................... 15

HP call ............................................................................................................ 15

IHF call ........................................................................................................... 15

Accessory call ................................................................................................ 15

APE audio ...................................................................................................... 16

Internal interfaces ............................................................................................ 16

McBSP interfaces .......................................................................................... 16

MCSI interfaces ............................................................................................. 16

UART interfaces ............................................................................................. 16

µWire interface ............................................................................................... 16

I2C ................................................................................................................. 16

ARMIO ........................................................................................................... 17

GPIO .............................................................................................................. 17

External interfaces ........................................................................................... 17

Back cover switch .......................................................................................... 17

Lid hall switch ................................................................................................. 17

MMC .............................................................................................................. 17

USB ................................................................................................................ 17

UI interfaces..................................................................................................... 17

Displays ......................................................................................................... 17

Keyboards ...................................................................................................... 18

Bluetooth ........................................................................................................ 18

IrDA ................................................................................................................ 18

Energy Management......................................................................................... 19

CMT EM........................................................................................................... 20

APE EM ........................................................................................................... 20

Battery.............................................................................................................. 21

Charging .......................................................................................................... 22

Backup battery and RTC.................................................................................. 22