Nokia 6021 Service Manual 07 rm94 sysmod

Nokia Customer Care

7 - System Module

Issue 1 04/2005 COMPANY CONFIDENTIAL

RM-94

Nokia Customer Care 7 - System Module

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2 COMPANY CONFIDENTIAL Issue 1 04/2005

RM-94 7 - System Module Nokia Customer Care

Table of Contents

Page No

Glossary of Terms............................................................................................... 5

Baseband.............................................................................................................8

Block diagram .................................................................................................... 9

Frequencies in baseband................................................................................. 11

PWB................................................................................................................. 11

Characteristics of the PWB ............................................................................11

Key components ............................................................................................11

Technical Specifications .................................................................................. 13

Baseband core................................................................................................. 13

UPP ................................................................................................................13

UEMEK ..........................................................................................................13

External SRAM and Flash ..............................................................................14

Energy management........................................................................................ 14

Modes of operation ........................................................................................14

No Supply ......................................................................................................14

Backup ...........................................................................................................14

Acting Dead ...................................................................................................14

Active .............................................................................................................15

Sleep Mode ....................................................................................................15

Charging ........................................................................................................15

Power distribution ............................................................................................ 15

DC characteristics............................................................................................ 16

Supply voltage ranges ...................................................................................16

Baseband regulators ......................................................................................17

Function Groups ............................................................................................... 18

Battery.............................................................................................................. 18

Audio................................................................................................................ 18

Internal microphone ....................................................................................... 18

Internal speaker ............................................................................................. 19

IHF speaker ...................................................................................................20

External audio ................................................................................................20

External microphone connection ....................................................................20

Headset connections .....................................................................................20

Test possibilities .............................................................................................20

Vibra................................................................................................................. 20

Test possibility ...............................................................................................21

LCD module..................................................................................................... 21

Characteristics ...............................................................................................21

LCD connector ...............................................................................................22

Test possibility ...............................................................................................23

Keypad............................................................................................................. 24

Test possibility ...............................................................................................24

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RM-94

Nokia Customer Care 7 - System Module

Illumination....................................................................................................... 24

Test possibility ...............................................................................................25

SIM................................................................................................................... 25

Test possibility ...............................................................................................26

IR module......................................................................................................... 26

Interfaces ...........................................................................................................27

BB-RF interface ............................................................................................... 27

System connector interface ............................................................................. 27

System connector ..........................................................................................27

ACI .................................................................................................................28

FBUS .............................................................................................................28

VOUT .............................................................................................................28

DC plug ..........................................................................................................29

RF Module Description.....................................................................................30

General specifications of the transceiver......................................................... 31

Frequency concept .......................................................................................... 32

RF power supply configuration ........................................................................ 32

RF block diagram............................................................................................. 33

Antenna switch (TX/RX switch)........................................................................ 34

Receiver .........................................................................................................35

Transmitter .....................................................................................................35

Frequency synthesizer ...................................................................................35

Signal paths..................................................................................................... 36

Receiver signal paths .....................................................................................36

Transmitter signal paths .................................................................................38

Frequency synthesizer signals .......................................................................39

Printed Wiring Board ........................................................................................ 40

RF key component placement ......................................................................... 41

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RM-94 7 - System Module Nokia Customer Care

Glossary of Terms

ACI Accessory Control Interface ADC Analogue to Digital Converter AFC Automatic Frequency Control ASIC Application Specific Integrated Circuit ASM Antenna switch module BB Baseband BSI Battery Size Indicator DCT4 Digital Core Technology, generation 4 DSP Digital Signal Processor DUT Device under test EDGE Enhanced Data Rates for Global Evolution EGPRS Enhanced General Packed Radio Service EMC Electro Magnetic Compatibility ESD Electro Static Discharge FCI Functional Cover Interface FR Full Rate GMSK Gaussian Minimum Shift Keying GPRS General Packed Radio Service GSM Global System for Mobile Communication GSM900 GSM900 (channels 1 - 124)+extended GSM900

(channels 975 - 1023, 0) HSCSD High Speed Circuit Switched Data HW Hardware IF Interface IHF Integrated Hands Free

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Nokia Customer Care 7 - System Module

IMEI International Mobile Equipment Identity I/O Input/Output IR Infrared IrDA Infrared Data Association LCD Liquid Crystal Display LED Light Emitting Diode LDO Low Drop Out LNA Low Noise Amplifier LO Local Oscillator MCU Micro Controller Unit PA Power Amplifier Phoenix SW tool of DCT4 PLL Phase Locked Loop PWB Printed Wired Board RF Radio Frequency RTC Real Time Clock RX Receiver SA Spectrum analyzer SIM Subscriber Identification Module SW Software TP Test point TX Transmitter UEMEK Universal Energy Management ASIC enhanced version UI User Interface UPP Universal Phone Processor USB Universal Serial Bus

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RM-94 7 - System Module Nokia Customer Care

VBU

<COFF>

Back-up Battery Cut Off voltage (typical: 2.0 V)

VCO Voltage controlled oscillator VCTCXO Voltage controlled temperature compensated oscillator V

<MSTR+>

Master Reset Threshold (typical: 2.1 V)

8-PSK Phase Shift Keying with 8 states (Modulation scheme for EDGE/

GPRS)

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RM-94

Nokia Customer Care 7 - System Module

Baseband

The RM-94 product is a DCT4.5 expression segment phone designed for the EGSM900, GSM1800 and GSM1900 networks.

The HW has the following features:

• GPRS and HSCSD with EDGE in up to (2RX + 2TX) (MCS5), without EDGE also in (3RX + 1TX) (MCS6)

• DCT4 with AMR and 16 MIDI tones

• 128/16 Mbit Combo memory

• Active display with 64k colours

• Battery BL-5B

• Illuminated XPress on grips

• PopPort

interface

• 5-way navigation key with select

• FCI rear side (C-cover)

•Vibra

•IHF

The RM-94 BB is based on the DCT4/4.5 engine and is compatible to the PopPort ries. The DCT4/4.5 engine consists basically of two ASICs. The UEMEK (Universal Energy Management IC including voltage regulators, charge control and audio circuit s, audio IFH amplifier from DCT4.5) and the UPP (Universal Phone Processor including MCU, DSP and RAM from DCT4).

accesso-

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RM-94 7 - System Module Nokia Customer Care

■ Block diagram

Figure 1:Baseband block diagram

UEMEK supplies both baseband and RF with power via built in voltage regulators, which are connected to the battery . The RF pa rts use mainly 2.78 V and the baseband p arts 1.8V I/O voltage. The UPP core is supplied with programmable core voltage of 1.0V, 1.3V or 1.5V . UEMEK includes 7 linear LDO (Low Drop-Out) regulators for baseband and 7 regulators for RF. It also includes 4 current sources for biasing purposes and internal usage. The UEMEK is furthermore supplying the SIM interface with a programmable voltage of 1.8V or 3V.

Note: 5V SIM cards are no longer supported by DCT-4 generation Baseband.

UPP operates from a 26 MHz clock coming from the RF ASIC Helgo. The clock signal is divided by two down to the nominal system clock frequency of 13 MHz. The DSP and MCU contain PLLs, which can multiply the system clock to a higher frequency.

A real time clock function is integrated into the UEMEK, which utilizes the same 32kHz clock supply as the sleep clock.

The communication between UEMEK and UPP is implemented using two bi-directional serial busses, CBUS and DBUS. The CBUS is controlled by the MCU and operates at a speed of 1 MHz. The DBUS is controlled by the MCU and operates at a speed of 13 MHz. Both processors are located in the UPP.

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Nokia Customer Care 7 - System Module

The UEMEK ASIC handles the analog interface between the Baseband and the RF section. UEMEK provides A/D and D/A conversion of the in-phase and quadrature receive and transmit signal paths and also A/D and D/A conversions of received and transmitted audio signals to and from the user interface. The UEMEK supplies the analog TXC and AFC sign als to the RF section according to UPP signal control. There are also separate signals for PDM coded audio. Digital speech processing is handled by the DSP inside UPP ASIC.

UEMEK is a dual voltage circuit, the digital parts are running from the baseband supply 1.8V and the analog parts are running from the analog supply 2.78V or backup battery. Also VBAT is directly used (Vibra, LED-driver, Camera Regulator).

The Baseband supports both internal and external microphone inputs and speaker outputs. Keypad tones, DTMF , and other audio tones are generated and encoded by the UPP and transmitted to the UEMEK for decoding. An external vibra alert control signals are generated by the UEMEK with separate PWM outputs.

EMC shielding is implemented using a soldered shielding, RF cans and PWB grounding.

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■ Frequencies in baseband

Table 1: Frequencies in baseband

Frequency Context UPP UEMEK Flash SIM Comment

32 kHz SleepClk X 1 MHz CBUS X X Up to 1 MHz RFConvClk X X Estimation 6,5 MHz Display IF X 3,25 MHz SIMIF X X Min 13 MHz DBUS, RFBUClik X X 26 MHz RF Clk X 52 MHz Memory Clock X X

■ PWB

Characteristics of the PWB

•Single PWB

• 8 layer board

• Double side assembled

Key components

Figure 2:Key components

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Nokia Customer Care 7 - System Module

Table 2: Key components

Position Component Name

D1470 HW Accelerator D2800 UPP8M V4.2E D2200 UEMEKv2.0 D3000 Combo Memory (128M NOR + 16M

UTRAM)

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Technical Specifications

■ Baseband core

UPP

Main characteristics of the used UPP are:

• DSP, LEAD3 16 bit DSP core 32 bit IF max. 200 MHz

• MCU based on ARM7 RISC MCU core max 50 MHz

• Internal 8 Mbit SRAM (PDRAM)

• General purpose UARTS

• SIM card interface

• Accessory interface (ACI)

• Interface control for Keypad, LCD, Audio and UEM control

• Handling of BB-RF Interface

UEMEK

Main characteristics of the used UEMEK are:

• ACI support

• Audio codec

• 11 Channel A/D converter

• Auxiliary A/D converter

• 32 KHz crystal oscillator

• SIM interface and drivers

• Security logic

• Storage of IMEI code

• Buzzer and vibra motor drivers

•PWM

• 2 LED drivers, keyboard and display backlight drivers

• Voltage reference for analogue blocks

• Charging function

• Baseband regulators

• RF regulators

• RF interface converters

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