Technical Overview

The mobile is built around the DCT-3 core (originally designed for a handportable phone) to operate in the GSM system. This is possible with a modest extension to the hardware as some provisions for use in a mobile are already included in the original core design. Some extensions to the original design has been necessary to be able to operate in an automotive environment, to include built-in handsfree operation and to use an active handset instead of the UI flex board of the handheld.

The purpose of the baseband module is to control the phone, process audio signals to and from the RF block and to and from the handset/ handsfree transducers. The module also includes a SIM card reader and furnishes external data (RS232 and Remote control via AT commands) and VDA specific control lines like BLD, AMC, CRM and IGNS.

The entire transceiver is built on a single multilayer PCB which is enclosed in a housing consisting of a metal bottom part, metalized shield, plastic part and a plastic top cover. The shield has different chambers to seperate RF from BB and to prevent trouble with Emmisions and Immunity tests during TA testing. Most components of the baseband section are surface mountable and are soldered using reflow.

The transceiver has three connectors.

- 32 pole connector which basically implements the car manufacturer recommendation for a GSM mobile phone, RU-HS connection, line-out connection.

- A 9 pole connector for data transfer.

- The RF connector for the antenna.

All internal connections on the board are by PCB wiring. The SIM card reader is soldered to the board.

General Information

Technical Documentation

Internal Connection Signal System
Figure 1. System Overview of CD949

The GSM Transceiver is the main part of the Product, earring the main GSM radio. Its has 3 Connectors:

1. System connector (Powersupply , Car signals, Audiosignals, Handset Cardata)

2. RF connector (GSM antenna)

3. Data Connector (Laptop)

The features of the GSM Tranceiver are listed below

1. Class 2 (8W) phase GSM 900 transceiver

2. Powersupply

3. Support of ignition sense and backlightdimming signals

4. Delivery of Carradiomute and Antenna motor control signals

5. High Quality Handsfreeaudio (car enviroment)

6. Poweramplifier for 4Q Handsfree Loudspeaker

7. Support of active Handsfree microphone according to VDA standard

8. Delivery of lineoutsignal to use the Carradios amplifiers and Loudspeakers for Handsfree (balanced)

9. SIM reader for large SIM-Card

10. RS-232 interface for Laptop connections

11. Connection to Handset

12. Car data interface for remotecontrol and Data applications Page 6 Issue 1 10/99

Technical Documentation

General Information

Antenna

Car battery

Ignition

Car radio mute

Antenna motor control

Backlight dimming

Microphone

Loudspeaker

Car radio audio in

Car application

RS 232 to Laptop

232 Connection Types Din

System connector

TrfJ

TrfJ

System connector

Motor Three Phase Pole Slot

Test-/Flash Interface

Figure 2. CD949 interconnection diagram

NME-3

PAMS

General Information

Technical Documentation

Technical Specification

Parameter

Type

Cellular System

GSM 900 Phase II

Tranciever Type

Class 2 Mobile (8 Watt)

System cable Interface

32 pole AMP connector

Data Interface

RS232 (full protocoll)(DSUB 9) and Remote control via system conector (system)

Installation

Trunk, cabin or DIN slot

SIM card

Full size SIM in RU (ISO 7816) Mini SIM in HS (ISO 7816)

Operational Temperature

-20 C to + 60 C (normal performance) -40 C to + 85 C (reduced performance) -40 C to + 85 C (storage)

Supply voltage (transmitting)

10.8 V to 16 V

Current consumption (power off)

< 1mA

Current consumption (idle mode)

150mA

Current consumption (transmit at max. PWR)

normal:1,5A maximal: 4A

Fuse

+12V Fuse 5A GND Fuse 5A IGNS Fuse 1A PCB Fuse for Fire protection

TX RF output power

8 Watt

HF Audio power

1.5 Watt at 4Ohm

Height

25mm

Width

170mm

Depth

115mm

Volume

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DSPRS232

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DATA INTERFACE

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EEPROM SKxS

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Nokia Premicell Rs232 Cable

SYNTHSTnC'FO

VCORE VBB

36 31

78 8B 81

23 22

20 19 15 17

MCUGen 100 DSPGenOut0

MCUGen 101 DSPGenOut1

MCUGen 102 DSPGenOut2

MCUGenI03 DSPGenOut3

MCUGenlOQ DSPGenOut1

MCUGenI05 DSPGenOut5

MCUGenlDG MGUGenI07 MCUGenI08 MGUGenI09 MCUGen 1010 MCÜGen 1011 MCUGen 1012 MCUGen 1013 MCUGen 1011 MCUGen 1015

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FrACtrl

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MCUGenOutB MCUGenOut 1 MCUGenOut 2

ROU5LCDCD MCUGenOut 3 MCUGenOut1 PCMRxData MCUGenOut5 PCMDClk

PCMSClk COBBADAX

CoEnuO CoEnul

JTRst JTClk JTDI JIMS GenDet

RFC Ik

RFClkGND

SIMCardDet X

HookDet

HeadDet

AccRxData

Ext MCUDa0 Ext MCUDal Ext MCUDa2 ExtMCUDa3 Ext MCUDal Ext MCUDa5 Ext MCUDaS Ext MCUDa7

MBUS

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CCCNTInt

Clk32k

VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC VCC ARMVCC

SCVCC

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GND GND GND GND GND GND GND GND GND GND GND GND

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SynthEna SunthCIk SynthData TxPA

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JTDO

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1SS 1S5 1S3 171

151 153

152 151 119

38 10 11 13 11

51 53 51

60 61 62 63 61

81 86

97 99

116 118

129 131

MCUADC21:0)

D602

LH28F160BGHE-TTL12

MCUDAC7:B

MCUDA(15:8)

FLASHM IMxIE

MHItnr?1 'CI

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Nokia 6090 Installation

MEMCCG:0)

OSMO Interface

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