Nokia N-Gage Service Manual 07 nem 4 baseband
Nokia Customer Care
NEM-4 Series Cellular Phones
7 - Baseband
Issue 2 09/2004 Copyright © 2004 Nokia Corporation. Page 7-1
Company Confidential
NEM-4 Company Confidential
7 - Baseband Nokia Customer Care
Table of Contents
Page No
List of Abbreviations ..................................................................................................... 4
NEM-4 Block Diagram.................................................................................................. 6
Baseband Technical Summary....................................................................................... 6
Functional Description................................................................................................... 7
BB description .............................................................................................................7
Memory configuration............................................................................................... 7
Energy management.................................................................................................. 8
Modes of operation ......................................................................................................8
Voltage limits............................................................................................................ 8
Clocking scheme ..........................................................................................................9
UPP_WD2 voltage/clock frequency adjusting.......................................................... 9
Power distribution, control and reset .........................................................................10
Power-up sequence (reset mode)............................................................................. 10
Powering off............................................................................................................ 10
Uncontrolled powering off...................................................................................... 11
Watchdogs............................................................................................................... 11
Charging.................................................................................................................. 11
Chargers .................................................................................................................. 11
Battery..................................................................................................................... 11
Back-up battery and real time clock ..........................................................................11
Baseband measurement A/D converter .....................................................................11
ZOCUS......................................................................................................................... 12
NEM-4 BB Features, HW Interfaces and User Interface............................................. 12
Display and keypad ....................................................................................................12
Bluetooth ....................................................................................................................12
SIM interface .............................................................................................................12
MMC interface ...........................................................................................................13
NEM-4 audio concept ................................................................................................13
ADSP....................................................................................................................... 13
Audio routing and conditioning .............................................................................. 14
FM radio play.......................................................................................................... 14
FM radio/line in recording ...................................................................................... 14
MP3/AAC playback................................................................................................ 14
GSM audio handsfree mode.................................................................................... 14
Standard ringing tones / alarm tones....................................................................... 15
MP3/AAC/MIDI ringing tones ............................................................................... 15
MultiMediaCard MMC........................................................................................... 15
ADSP flash memory................................................................................................ 15
Acoustics................................................................................................................. 15
Earpiece................................................................................................................... 15
Microphone ............................................................................................................. 15
Loudspeaker............................................................................................................ 15
Headset.................................................................................................................... 16
FM radio.................................................................................................................. 16
Flashing ......................................................................................................................16
Testing interfaces .......................................................................................................17
Extreme voltages ......................................................................................................18
Page 7-2 Copyright © 2004 Nokia Corporation. Issue 2 09/2004
Company Confidential
Company Confidential NEM-4
Nokia Customer Care 7 - Baseband
Temperature conditions .............................................................................................18
Humidity and water resistance ...................................................................................18
Issue 2 09/2004 Copyright © 2004 Nokia Corporation. Page 7-3
Company Confidential
NEM-4 Company Confidential
7 - Baseband Nokia Customer Care
List of Abbreviations
ADSP Application DSP, TMS320DA250
AIC Audio Codec for Amadeus, manufactured by TI
ASIC Application Specific Integrated Circuit
BB Baseband
BLUETOOTH, BT Bluetooth
BSI Battery Size Indicator
CBus Control Bus connecting UPP_WD2 with UEM
CPU Central Processing Unit
DBUS Data Bus
DSP Digital Signal Processor
EGSM Extended – GSM
GPRS General Packet Radio Service
GSM Group Special Mobile/Global system mobile
HF Hands free
HFCM Handsfree Common
HS Handset
I/O Input/Output
IHF Integrated hands free
IR Infra red
LCD Liquid Crystal Display
MCU Micro Controller Unit
MIC, mic Microphone
PDA Pocket Data Application
PWB Printed Wiring Board
Page 7-4 Copyright © 2004 Nokia Corporation. Issue 2 09/2004
Company Confidential
Company Confidential NEM-4
Nokia Customer Care 7 - Baseband
RF Radio Frequency
RFBUS Control Bus For RF
SDRAM Synchronous Dynamic Random Access Memory
SIM Subscriber Identity Module
UI User Interface
UEM Universal Energy Management
USB Universal Serial Bus
VCXO Voltage Controlled Crystal Oscillator
VGA Video Graphics Array
Issue 2 09/2004 Copyright © 2004 Nokia Corporation. Page 7-5
Company Confidential
NEM-4 Company Confidential
7 - Baseband Nokia Customer Care
NEM-4 Block Diagram
NEM-4 product consists of RF, BB, Bluetooth and audio blocks.
External interfaces of NEM-4 consist of Bluetooth, stereo and mono headsets, charger as
well as the Universal Serial Bus (USB).
Figure 1: NEM-4 Block Diagram
Bluetooth
Antenna
USB
MMC
Nectar FM
radio chip
Radio out L
USB bus
Buffer
MMCclk
MMC bus (cmd,Data)
Lester
FM
Antenna
(Located in Stereo
Headset cable)
Radio out R
RF in
2
I
C bus
3-wire bus
FLASH
Amadeus
Digital Audio
Audio
codec
Stereo
Direction
switch
Stereo
Headset /
LIne In
(2,5 mm jack)
Display Keyboard
Amadeus-WD2 bus (level shifting in UEM)
McBSP
WD2
<- XEAR
MIC3 ->
Memories
FLASH
Control
Loudspeaker
SDRAM
Amplifier
<- XEAR
Bluetooth
Battery
Vibra
<- HF
<- HFCM
+
Mono
SIM
UEM
MJOELNER
Testpoints:
FBUS
MBUS
USB
FM radio
Battery
Charging
(DC jack)
Earpiece
Microphone
Mono
Headset
(2,5mm jack)
RF parts
Baseband Technical Summary
Baseband is basically constructed around three main ASICs or chips: UPP_WD2 (engine
ASIC with MCU, DSP and Digital Control Logic), UEM (handles e.g. power management,
charging and part of the external interfaces) and ADSP (audio processing). Discrete regulators are also used for powering.
Memory comprises of 3 x 64Mbit flash memory devices and 128Mbit (16Mbytes)
SDRAM.
For data connectivity there are Bluetooth, USB and MMC card.
The display is an MD-TFD LCD panel module with 4096 colours and 176x208 pixels with
backlighting. The keypad is a gaming keypad with a rocker and shortcut keys.
Page 7-6 Copyright © 2004 Nokia Corporation. Issue 2 09/2004
Company Confidential
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