Boss Audio Systems CCR612 User Manual

APPLICATION NOTE

User Manual of High-End

RDS/EON Car Radio System

CCR612 (V0.3)

AN96029

Philips Semiconductors

User Manual of High-End RDS/EON
Car Radio System CCR612 (V0.3)

Abstract

The CCR612 is a computer controlled car radio system based on a P83CE528 micro controller. It controls a
high-end AM/FM car radio with RD(B)S, EON and various I2C controlled peripherals. It can be interfaced to a
SCC600 CD-changer

The system contains functions such as PLL tuning, IF control, stereo decoding, RDS/RBDS+EON decoding, IAC,
sound switching, sound fader control, LCD display, cassette interface, external audio input jack and a detachable
front. An interface to control a CD-changer is also provided.

Radio control and RDS/RBDS+EON processing are combined in a single microcontroller.

Application Note

96029

"The purchase of Philips’ complete set of Integrated Circuits as specified in this User Manual for manufacture of
a radio system conforming the relevant specification as herein given, secures immunity from suit on
unauthorized use of those Philips’ patent rights, which specifically relate to automatic broadcast station storage
(AST) and/or radio data system (RDS) features."

Purchase of Philips I2C components conveys
a license under the I2C patent to use the com­ponents in the I2C system, provided the
system conforms to the I2C specifications
defined by Philips.

© Philips Electronics N.V. 1997

All rights are reserved. Reproduction in whole or in part is prohibited without the prior written consent of the copy­right owner.

The information presented in this document does not form part of any quotation or contract, is believed to be
accurate and reliable and may be changed without notice. No liability will be accepted by the publisher for any
consequence ofitsuse. Publication thereof does notconvey nor implyany license underpatent- or other industrial
or intellectual property rights.

2

Philips Semiconductors

User Manual of High-End RDS/EON
Car Radio System CCR612 (V0.3)

APPLICATION NOTE

User Manual of High-End

RDS/EON Car Radio System

CCR612 (V0.3)

AN96029

Author(s):

A. Demmers

M. Verheijden

Product Concept & Application Laboratory Eindhoven,

The Netherlands

Application Note

96029

Keywords

Car Radio

RDS

RBDS

EON

CCR612

ICE (TEA6811 / TEA6822)

SOFAC (TEA6320, 6321, 6322 or 6323)

CD-changer

Number of pages: 94

Date: 1996-05-24

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Philips Semiconductors

User Manual of High-End RDS/EON
Car Radio System CCR612 (V0.3)

Summary

CCR612 is a computer controlled car radio system based on a P83CE528 microcontroller. It controls a high-end
AM/FM car radio with R(B)DS (Radio Broadcasting Data System), EON (Enhanced Other Network) and various
I2C-bus controlled peripherals.

The system contains functions such as PLL tuning, IF control, stereo decoding, RDS/RBDS+EON decoding, IAC,
sound switching, sound fader control, LCD display, cassette interface, external audio input jack and a detachable
front. An interface to control a CD-changer is also provided.

Radio control and RDS/RBDS+EON processing are combined in a single microcontroller.

Application Note

96029

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Philips Semiconductors

User Manual of High-End RDS/EON
Car Radio System CCR612 (V0.3)

Application Note

96029

CONTENTS

1 INTRODUCTION ............................................................... 11

1.1 Definitions, Acronyms and Abbreviations ...................................... 12

1.2 References .............................................................. 12

2 HARDWARE CONFIGURATION .................................................. 13

2.1 Block diagram CCR612 .................................................... 13

2.1.1 Main Board Part 1a (Basic AM/FM stereo Radio Part) ................... 13

2.1.2 Main Board Part 1b (Optional Power Amplifier, 2 x TDA8561Q) ........... 15

2.1.3 Main Board Part 1c (Optional Source Sel. & Audio Contr.

HEF4052B/TDA1526) ............................................. 15

2.1.4 Main Board Part 2a ( Micro-controller, EEPROM and RDS Demodulator) .... 16

2.1.5 Main Board Part 2b (Detachable Front) ............................... 16

2.1.6 Main Board Part 3 (Cassette Interface including Dolby B*) ............... 16

2.1.7 Front Panels ..................................................... 17

2.1.7.1 Front Panel Part FP-1a (Key and Display panel) .............. 17

2.1.7.2 Front Panel Part FP-1b (Detachable Front Version). .......... 17

2.1.8 Diagram ICE module. .............................................. 17

2.1.9 Diagram PACS Sub Board ......................................... 18

2.1.10 PCB LAY-OUTS of CCR612 sample Version D. ........................ 18

2.2 Performance of the radio ................................................... 19

3 SHORT SPECIFICATION ........................................................ 23

4 CCR612S PINNING AND INTERFACING ........................................... 30

4.1 Pinning overview .......................................................... 30

4.2 Factory options ........................................................... 38

4.2.1 Diode options .................................................... 38

4.2.2 Automatically detected options ...................................... 39

2

4.3 I

4.4 The keyboard ............................................................ 39

4.5 Power stabilizer interface. .................................................. 42

4.6 LCD display. ............................................................. 44

4.7 Non Volatile Memory. ...................................................... 45

5 KEY FUNCTIONS .............................................................. 46

6 FUNCTIONAL DESCRIPTION .................................................... 57

6.1 Switching on / off .......................................................... 57

6.2 Tuning .................................................................. 58

C bus addresses ......................................................... 39

4.4.1 Fixed keyboard ................................................... 40

4.4.2 Detachable keyboard .............................................. 40

4.4.3 Keyboard options ................................................. 41

6.2.1 Band switching ................................................... 58

6.2.2 Manual/search tuning ............................................. 58

6.2.3 Frequency scan .................................................. 60

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Philips Semiconductors

User Manual of High-End RDS/EON
Car Radio System CCR612 (V0.3)

6.2.4 Selecting preset stations ........................................... 60

6.2.5 Storing stations in preset memory .................................... 60

6.2.6 AST search ...................................................... 61

6.2.7 The LOCAL/DX key ............................................... 61

6.3 CD-Changer, Cassette and external source interface ............................ 61

6.3.1 The MODE key ................................................... 62

6.3.2 CD-changer mode ................................................ 62

6.3.3 Cassette functions ................................................ 63

6.3.4 External audio source ............................................. 63

6.4 Audio control ............................................................. 63

6.4.1 The SELECT key ................................................. 64

6.4.2 Changing a setting ................................................ 64

6.4.3 The LOUD key / RESET function .................................... 64

6.4.4 The MUTE key ................................................... 65

6.4.5 Phone mute ..................................................... 65

6.4.6 Power amplifier diagnostics control .................................. 65

6.4.7 User programmable options ........................................ 65

6.5 RDS / RBDS functions ..................................................... 66

6.5.1 AF follow mode ................................................... 66

6.5.2 PTY functions .................................................... 67

6.5.3 Traffic announcements ............................................ 68

6.5.4 PTY alarm broadcasts ............................................. 68

Application Note

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7 RDS / RBDS FACILITIES. ....................................................... 69

7.1 Programme Identification code .............................................. 69

7.2 Programme Service name .................................................. 69

7.3 Programme TYpe ......................................................... 69

7.4 Traffic Announcements .................................................... 70

7.5 Alternative Frequency following .............................................. 70

7.6 EON preset update ........................................................ 71

APPENDIX I NVM layout and initialisation ........................................... 72

APPENDIX II Segment addresses for 143 segment display .............................. 77

APPENDIX III LCD Display Character Set. ............................................ 79

APPENDIX IV CIRCUIT DIAGRAMS .................................................. 80

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Philips Semiconductors

User Manual of High-End RDS/EON

Application Note

Car Radio System CCR612 (V0.3)

Modification with respect to old documents:

This document replaces the following two documents:
User Manual of Computer Controlled Car Radio System CCR612 V0.2 AN95081
Diagrams and Performance of R(D)BS Car Radio CCR612 with Cassette Deck and CDC Changer

(V1.1) AN95070

Change history of: User Manual of High-End RDS/EON Car Radio System
CCR612S

Modificationswithrespecttotheapplicationnote"UserManualofHigh-EndRDS/EONCarRadioSystem
CCR612S (Version 0.2)", report number AN95081.

1. Addeduseofmoretypes of Sofac(TEA6320, TEA6321,TEA6322,TEA6323),adaptedsoundsetting

2. Band selection diode 2 moved to other pin

3. Sleeptimer changed from 30 minutes to 1 hour

96029

Modificationswithrespecttotheapplicationnote"UserManualofHigh-EndRDS/EONCarRadioSystem
CCR610S (Version 0.1)", report number AN94065.

1. TEA6821 replaced by TEA6822.

2. Frequency counter resolution for FM changed from 5 kHz to 6.25 kHz.

3. Volumelevel duringtraffic announcementsmade adjustableby theuser inthe optionprogramming
menu.

4. PTY search algorithm changed.

5. Functionality of PTY icon changed.

6. Manual tuning algorithm changed.

7. For MW band only tuning on grid is possible.

8. Manual tuning grid for USA option changed from 50 kHz to 100 kHz.

9. Search tuning grid for USA option changed from 100 kHz to 200 kHz.

10. Pin 9 of the microcontroller (SECUR) not used any more (security functionality stays the same).

11. Input added for "Phone mute".

12. Checking on not initialized EEPROM and preprogramming them with default values (listed in
appendix II) at radio switch on.

13. Polarity of pin EXSTAT changed.

14. Crystal frequency of microcontroller changed from 8.664 MHz to 12 MHz.

15. PTY code not longer stored in EEPROM.

16. When RDS regional mode is on, the radio is now also allowed to switch over to stations with the
same PI-code but its regional code set to "Supra regional".

17. Display message during AST search changed from "AST SCAN" to "STORE".

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Philips Semiconductors

User Manual of High-End RDS/EON

Application Note

Car Radio System CCR612 (V0.3)

Change historyof: Diagrams and performance of R(B)DSCar Radio CCR612 with
Cassette Deck.

DIFFERENCES WITH PREVIOUS CCR612 (AN95070).

Mainboard part 1:

Two diodes were added to improve reset behaviour
In case a static on/off key is used, C144/C154/C151 must be 10µF i.s.o. 100nF.

Mainboard part 2:

Option diode D8 is removed. Option diode D2 is now connected to pin 21.
Option diode D4 and D6 are removed.

DIFFERENCES WITH PREVIOUS CCR612 (AN94067).

Thisnote,DiagramsandPerformance,validforCCR612radiosample(versionD)controlledbyCCR610S
or CCR612S software (the latter, also for CDC-changer control), differs mainly from the previous one
(Version 1.0) by the following modifications and corrections.

96029

Modifications and Improvements.

General:

Componentnumbering CCR612radiosample.Unlikepreviousnote,theelectricalcomponent numbers
ofthePCBboards(Fig.13bandFig.13d)domatchwiththeelectricaldiagrams(Fig.4,Fig.7 and Fig.9),
which belong to the CCR612 radio sample (Version D).

Main Board part 1a, 1b and 1c (pages 14, 15 and 16).

- A CDC-changer interface circuit has been introduced, using an extra TDA8579T and intended for
CDC-changer SCC600, controlled by CCR612S software.

- Switched battery voltage circuit improved. Which delivers for external use a battery voltage only
when the radio is in the Power On mode for; supplying the illumination of the detachable front and
delivering a switched plus voltage for the line-out, motor antenna and CDC-changer.

- A telephone mute circuit between Connector Block and Micro Controller pins (AUMUTE and
OPTROW)has beenintroduced. Forthis featurethe formersecurity contact is used. In general this
is not a problembecause the trend to usea securitycontact is decreasing by theuse of detachable
fronts.

- For part 1c only, thebleep inputis moved from the source selector (HEF4052B)input tothe Audio
Pre Amplifier (TDA6320T) input.

Main Board part 2a and 2b (Page 17 and Page 18 ).

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Philips Semiconductors

User Manual of High-End RDS/EON

Application Note

Car Radio System CCR612 (V0.3)

- Telephone mute circuit, between optrow (40) and Aumute (43) introduced.

- The use of one crystal (8.66 MHz) for both micro and RDS demodulator is not possible in this set.
Because for improved RDS behaviour more ’speed’ is needed which requires a crystal of 12 MHz
for the micro and 8.66 MHz or 4.33 MHz for the RDS demodulator.

- For part 2b only, in the lines ON/OFF, DATA and SCL between detachable front and micro ESD
protection circuits are introducedwhich consists ofa few resistors, zener diode5V6 (BZX79C) and
2 diodes (BAV99).

Key and Display panel SB1b (Page 21).

- Following anowa days trendthepower switch, intheON/OFF radio line,ismovedto the detachable
front. That means two extra contacts on both detachable front and radio are needed.

Diagram ICE Module (page 22).

- The diagramoftheICE module (Euro1, standard)ismodified,the "second" ICTEA6821isreplaced
by the successor TEA6822.

- The diagramoftheICE module (Euro1,standard)is modified, the"second"ICTEA6821 is replaced
by the successor TEA6822.

Improvements of the TEA6822 with respect to the 6821:
At AM.

- Sensitivity higher. Distortion and AM and AF output less fieldstrength dependent

At FM.

- Interference Absorbtion improved by double detection.

- Gain less temperature dependent

- AM to FM switching in less then 0.5 seconds

With respect to software control.

- Level ADC extended from 3 to 4 bits.

- Multipath sensitivity to be set.

- Level temperature coefficient to be chosen (1 bit) for CDSP applications.

- Counter pre-scaler setting added to reduce counter time.

96029

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Philips Semiconductors

User Manual of High-End RDS/EON
Car Radio System CCR612 (V0.3)

Application Note

96029

10

Philips Semiconductors

User Manual of High-End RDS/EON

Application Note

Car Radio System CCR612 (V0.3)

1 INTRODUCTION

CCR612 is a computer controlled high-end AM/FM car radio system with R(B)DS (Radio Broadcasting
Data System), EON (EnhancedOther Networkinformation) and I2C-bus controlled radio IC’s.CCR612S
is thecontrolling microprocessor. CD-changer controlis also preformed bythe CCR612S. It isbased on
the8051 familymicrocontroller P83CE528 andtakes care ofall radiocontrol functions aswell as R(B)DS
and EON decoding. With the following features:

Digital PLLtuning for FM, MW, LW and SW(49m) bands, (factory options: MW, LW and SW disable).
Factory option for application in different parts of the world (e.g. USA / Europe) concerning the band

limits and tuning grid.
Manual Tuning, Search Tuning and Local/Dx handling.
Frequency Scan (Continuous Search, pausing 6 seconds on every station).
Automatic Store Tuning (AST).
Search for Traffic Programmes (TP) or specific Program Types (PTY).
Presets: 6 in each of the bands: FM1, FM2, FM-AST, MW, MW-AST, LW and SW (49m).
R(B)DS functions:

- PS Programme Service name.

- PI Programme Identification code.

- AF Alternative Frequency List / Automatic Following.

- TP / TA Traffic Programme / Traffic Announcement.

- PTY Programme TYpe selection and display. PTY Code table for both RDS and RBDS.

- EON Enhanced Other Networks information.

Soundcontrol: volume,bass, treble, balance,fader, loudnessandmute viaI2C-busor potentiometers.
Non Volatile Memory for last sound control settings, last band, last frequency for each band, Presets,

PS names (RDS), AF lists (RDS), etc.
LCD display (I2C bus controlled) displaying:

- system status (band / frequency / preset number / modes).

- RDS Programme Service name (PS).

- RDS Programme Type (PTY).

- Sound control settings (Bass, Treble, Balance, Fader).

Power stabilizer control with diagnostic functions.
User control up to 27 keys with either a fixed keyboard, a keyboard on a detachable front or a

combination of both.
User programmable options.
Cassette Interface including MTL, Dolby, AMS (Automatic Music Search) and Solenoid control.
Input jack for external audio source.
Input for phone mute detection.
An interface for the SCC600 CD-changer.

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Philips Semiconductors

User Manual of High-End RDS/EON

Application Note

Car Radio System CCR612 (V0.3)

1.1 Definitions, Acronyms and Abbreviations

AF Alternative Frequencies (R(B)DS-information) / Automatic Follow;
AMS Automatic Music Search;
AST Automatic Store Tuning;
EON Enhanced Other Network (R(B)DS-information);
I2C Inter-ICbus;
ICE In Car Entertainment;
LCD Liquid Crystal Display;
MTL Metal (versus Chrome/Ferro) type of tape;
NVM NonVolatile Memory (EEPROM);
PI Programme Identification (R(B)DS-information);
PS ProgrammeService name (R(B)DS-information);
PTY Programme TYpe (R(B)DS-information);
RDS Radio Data System;
RBDS Radio Broadcast Data System;
TA Traffic Announcement (R(B)DS-information);
TP Traffic Programme (R(B)DS-information).

AF follow Radio will always be tuned to the Alternative Frequency with the best signal quality.
mode

96029

Traffic A station of which the TP (this station) or TA (linked via EON) bit is set to indicate that
station traffic announcements will be transmitted via this station or linked EON stations.

NOTE: RBDS is an extensionof the European RDS system. Every reference in this documentto RDS is
also valid for the RBDS system unless, otherwise specified.

1.2 References

[1] Outline specification of High-End RDS/EON Car Radio System (CCR612S)

(version 0.2) AN96043
PCALE, A. Demmers, M. Verheijden.

[2] Specification of the radio data system RDS for VHF/FM sound broadcasting,

European Standard CENELEC Ref.No. EN 50067

[3] United States RBDS standard January 8, 1993

Specification of the radio broadcast data system, NRSC

[4] TEA6811/TEA6822 Car Radio Receiver (V 1.2) AN95074

PCALE, W van Dooremolen.

[5] Improved Dynamic Radio Reception with PACS (TEA6850). AN95052

PCALE, H de Ruijter.

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Philips Semiconductors

User Manual of High-End RDS/EON

Application Note

Car Radio System CCR612 (V0.3)

2 HARDWARE CONFIGURATION

2.1 Block diagram CCR612

Figure 1 shows the block diagram of the high-end computer controlled RDS car radio system CCR612.
As can be seen in the block diagram, the system can either be equipped with a fixed keyboard or with a
detachablekeyboard. The detachablekeyboardversionofthesystemstillallowssomekeys to berealised
as fixed keyboard keys. Furthermore a choice exists with respect to the following system parts:

- Power amplifier ( 2 speaker / 4 speaker / output power)

- Sound control (Potentiometer control / I2C control)

This hardware description only describes the use of the sofac TEA6320.

2.1.1 Main Board Part 1a (Basic AM/FM stereo Radio Part)

Page81showsthecircuitdiagramofthebasicradiopart,whichconsistofthefollowingparts:ICEreceiver
module,audio pre-amplifier,power amplifier,power stabiliser, differentialline receiverand PACScontrol
board.

AM/FM - ICE module (TEA6811V,TEA6822T)

The AM/FM - ICE module is a sub-board ( see paragraph 2.1.8)which comprises a two IC package (RF
ICTEA6811VandIFICTEA6822T)and is designed especiallyfor use incar radio’s. Themodule contains
the following functions;

AM receiver
FM receiver

- FM stereo decoder

- Interference Absorption Circuit (or Noise Blanker)

- Station detector and weak signal control

PLL tuning Synthesizer
I2C-Bus control

96029

The complete circuit diagram of the ICE Module (version euro 1) is shown on page 89. For a detailed
description of functions and performance see Ref.4.

Audio Pre Amplifier (TEA6320)

I2C-Buscontrolledaudiopre-amplifierinSOpackageforcarandhomereceivers,includesSourceselector
(forfourstereoinputsandonemonoinput),Loudnesscharacteristic, Volume control, Bass control, Treble
control, Balance and Fader control.

Power Amplifier (TDA8561Q)

Carradio poweramplifier withdynamic distortiondetector and diagnostics in a17 leadsingle inline (SIL)
plastic power package. It contains 4 x 12W (2 ohm)and 4x 7W(4 ohm)single-ended or2 x24W (4 ohm)
bridge amplifiers.

Supply voltage Stabilizer (TDA3602)

Three output voltage regulator, in SIL 9 package, for use in car radios with amicroprocessor. It contains
twocomputer controlledvoltageregulators withfoldback current protection(Regulators 1and 2) andone
fixed voltage regulator (3) that also operates during load dump and thermal shutdown. This regulator is
used to supply the microprocessor.

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Philips Semiconductors

AM/FM-IF
MPX DEC.+IAC
TEA6822T

L
R

LCD

DISPLAY

MAIN IIC -BUS

VOLTAGE
STABILIZER
TDA3602

FM / AM

CASSETTE
CONTROL
INTERFACE

LCD DRIVER

PCF8576

RDS

DEMODULATOR

SAA6579T

RDSCLK
RDSDAT

EEPROM
PCF8594E

-2(P/T)

MICROCONTROLLER

CCR612S

(P83CE528)

AM/F M- RF

PLL-SYN TH

TEA681 1V

AUDIO CONTROL

TEA632x T

OR

TDA152 6

POWER

AMP

TDA8562Q

or

TDA8561Q

(2x)

CDC

INPUT

JACK

ISOLATOR

TDA8579(T)

CASS(L)
CASS(R)

LF

LR

RF

RR

CDC_L

CDC_R

CASS(L)

CASS(R)

TEA0675(T)
or: TEA0677(T)(no dolby)

MAIN uP ,NVM
RDS DEMODULATOR
MAIN BOARD PART 2

DISPLAY PANEL
FIXED KEYBOARD
FRONT-PANEL FP1A/B

KEYBOARD SCAN LINES

EX STATE

8

LCD

DISPLAY

LCD DRIVER

PCF8 576

DETACHABLE

KEYBOARD

SCANNER

PCF8574

KEYBOARD SCAN LINES / DETACH. KEYB IIC-BUS

OR

DISPLAY PANEL
DETACHABLE KEYBOARD
FRONT-PANEL FP1C

HEAD AMPL DOLBY AMS PROC.

AMSDOLBYMECR

CASSETTE INTERFACE
MAIN BOARD PARTS

EXTERNAL

AUDIO

JACK

EX_L

EX_R

ISOLATOR

TDA857 9(T)

CDC_bus

5

PACS
TEA6850

SUB-BOARD

MPXIF

MPX

MONO

DIAG.

BLEEPIn-lock

ICE MODULE

AM/FM RECEIVER
Stereo decoder
Audio Amplifier
Power supply

MAIN BOARD PART 1

User Manual of High-End RDS/EON
Car Radio System CCR612 (V0.3)

Application Note

96029

Figure 1 Block diagram CCR612

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Philips Semiconductors

User Manual of High-End RDS/EON

Application Note

Car Radio System CCR612 (V0.3)

Isolator ( Differential Line Receiver, TDA8579T)

Dual common-mode rejection differential line receiver with 0 dB gain and low distortion. This device is
intendedto be used to receive line inputs in audioapplications thatrequire ahigh levelof common-mode
rejection. The device is encapsulated in an 8-pin SO or DIL package. In this set the isolator is used
between the external input and source selector input. Both the external input plug circuit and the
CD-changer input circuit are equipped with an isolator.

PACS - Sub Board (TEA6850)

PACScontrols theI.F. Selectivity /Bandwidth toavoid receiving problemsdue tonear adjacent channels
(especiallyfor Europe,spacing of100 kHzis notan exception). In order to show theimprovements ofthe
selectivity anddynamic behaviour of the radio by the use of PACS anON/OFF switch has been used on
the front panel.

A complete circuit diagram of the PACS board is shown on page 94 and for description of the functions,
alignment and performance see Ref.5.

2.1.2 Main Board Part 1b (Optional Power Amplifier, 2 x TDA8561Q)

Page 82 shows the previous circuitdiagram (paragraph2.1.1 BasicAM/FM stereo Radio Part) equipped
with circuits for 4 x 24W (4 ohm) audio output power.

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Power Amplifier (2 x TDA8561Q)

Single circuit configuration 2 x 24W (4 ohm) bridge amplifiers, package SIL 17 pins Quil.

2.1.3 Main Board Part 1c (Optional Source Sel. & Audio Contr. HEF4052B/TDA1526)

Page83 showsthe circuit diagramfrom paragraph2.1.1 (Basic AM/FMstereo RadioPart) equipped with
the DC controlled audio pre-amplifier (TDA1526) and a source selector circuit (HEF4052B).This set-up
is used in case potentiometer control for volume and tone is desired.

Audio Pre-Amplifier and DC Control (TDA1526).

An active stereo,tone/volume control for car radios. It includes functions for bass and treble, control,
volumecontrolwithbuiltincontour(can be switched off)and balance.All thesefunctions can becontrolled
direct by DC voltages or via single linear potentiometers.

Source selector circuit (HEF4052B).

TheHEF4052Bis a dual 4channelanaloguemultiplexer/demultiplexerwithcommonchannelselectlogic.
In this case used for four stereo inputs: radio, cassette and external input.

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User Manual of High-End RDS/EON

Application Note

Car Radio System CCR612 (V0.3)

2.1.4 Main Board Part 2a ( Micro-controller, EEPROM and RDS Demodulator)

Page 84 shows the circuit diagram of the RDS Demodulator, Micro controller (which combines all radio
control functions as well as RDS decoding) and EEPROM.

Microcontroller (P83CE528EFB)

Main microcontroller (CCR612S), a derivative of the 8051 micro-controller family with an 8-bit CPU, 32
Kbytes ROM, 512 bytes RAM and four 8-bits I/O ports in a 44-pins QFP package.

EEPROM (PCF8594E-2P/T)

ThePCF8594E isa512byte,5VElectricallyErasableProgrammableReadOnlyMemory (EEPROM)that
can be 100,000 times re-written. I2C-bus controlled.

RDS Demodulator (SAA6579T)

RDS Demodulator IC, which includes the 57 kHz band-pass-filter, to generate the RDS data out of the
MPX signal.

2.1.5 Main Board Part 2b (Detachable Front)

Page85shows thepreviouscircuitdiagram (paragraph2.1.4) ofthemicro controller boardextendedwith
the possibility to use a detachable front panel.

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2.1.6 Main Board Part 3 (Cassette Interface including Dolby B*)

Page 86shows the circuit diagram of the cassette interface circuit for the Philips cassette deck P6-29/3.
Thecircuitis based ontheTEA0675,Dual Dolby* B-typenoisereductioncircuit for playbackapplications.

The TEA0675 includes head and equalization amplifiers with electronically switchable time constants.
Furthermore the TEA0675 includes electronically switchable inputs for tape drives with reverse heads.
This device also detects pauses of music in the AMS (Automatic Music Search) scan mode.

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User Manual of High-End RDS/EON

Application Note

Car Radio System CCR612 (V0.3)

2.1.7 Front Panels

2.1.7.1 Front Panel Part FP-1a (Key and Display panel)

Page 87 shows the circuit diagram of the key and display panel.

LCD Driver (PCT8576CT)

ThePCF8576isa peripheral devicewhichinterfacestoalmost any liquidcrystal display(LCD)havinglow
multiplex rates. It generates the drive signals for any static or multiplex LCD containing up to four back
planes and up to 40/24 segments and can easily be cascaded for larger LCD applications. I2C-bus
controlled.

2.1.7.2 Front Panel Part FP-1b (Detachable Front Version).

Page88 shows thecircuit diagram ofthe detachablekeyboardfront. Thecircuitincludes anI/Oexpander
PCF8574, the keyboard and LCD display unit are placed on thedetachable front controlled by a second
I2C bus. Eight contacts are required to connect the detachable front to the radio. Furthermore there is a
fixed key-board with alimited number of keys included.That means it is possibleto use a combination of
detachable keys and fixed keys (for circuit example see page 85).

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2.1.8 Diagram ICE module.

Standard Version EURO 1

Page 89 shows the complete circuit diagram of the ICE AM/FM tuner module version Euro 1.
The Standard Euro 1 module is intended for European frequency ranges.

FM 87.5 to 108.0 MHz
AM (MW) 531 to 1629 kHz
AM (LW) 144 to 288 kHz

The module contains the IC’s TEA6811V and TEA6822T with the following main functions;

TEA6811 - AM RF TEA6822 -2ndAM mixer

- AM mixer - 2ndFM mixer

- FM mixer - AM/FM - IF amplifier

- AM/FM oscillator - AM and FM demodulator

- Tuning synthesizer - x-tal oscillator (61.5 MHz)

-I2C-Bus - Stereo Decoder and IAC

- Station (stop) detector

- Weak signal processing

- Multi Path Detector

-I2C-Bus

17

Philips Semiconductors

User Manual of High-End RDS/EON

Application Note

Car Radio System CCR612 (V0.3)

EURO 2, USA 1 and JAPAN 1 ICE MODULE VERSIONS.

By slight circuit modifications of the standard module (EURO 1), matched module versions with better
performance for e.g. USA an Japan can be derived. The needed modifications for the different modules
are:

Module Version Modifications.

Euro 1 Non

Euro 2 (including S.W.) A short wave transformer i.s.o. L8 and C29

USA 1 L15 short circuited

C2 10pF i.s.o. 5p6
C72 6p8 deleted
R18 1 Mohm i.s.o. 220 Kohm
R54, in parallel with C26 (1uF)
C61 10 nF i.s.o. 6n8
C62 10 nF i.s.o. 6n8
Z1 SFR450H i.s.o. SFP 450H
Z3 SFE 10.7 MS3 G-A 220 kHz i.s.o. SFE10.7 MS3 A 10k-A
Z2 & Z4 SFE 10.7 MS2 G-A 180 kHz i.s.o. SFE10.7 MS3 A 10k-A
R41 (pre-set adjust) replaced by resistor of 68 Kohm.
R44 120 Kohm i.s.o. 82 Kohm.

96029

Japan 1 C7 47 pF i.s.o. 180pF

C9 deleted
D3 BB814 selection i.s.o. BB804

2.1.9 Diagram PACS Sub Board

Page 94 shows the diagram of the PACS Sub-Board using the TEA6850. For circuit description,
performance and PCB lay out see application note Ref.5.

2.1.10 PCB LAY-OUTS of CCR612 sample Version D.

CCR612/Mainboard PCB lay-out TOPside Copper (p.90, fig. a) / Components (non SMD) (p.90, fig. b)
CCR612/Mainboard PCB lay-out BOTTOM side Copper(p. 91, fig. c) / SMD Components (p. 91, fig.d)
ICE module board PCB lay-out TOP side Copper(p. 92, fig. a) /Components (non SMD) (p. 92, fig. b)
ICE module board PCB lay-out Bottom side Copper(p. 92, fig. c) / SMD Components (p. 92, fig. d)
Front panel PCB lay-out Top side Copper (p. 93, fig. a) / Components (non SMD) (p. 93, fig. b)
Front panel PCB lay-out Bottom side Copper (p. 93, fig. c) / SMD Components (p. 93, fig. d).

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Philips Semiconductors

User Manual of High-End RDS/EON
Car Radio System CCR612 (V0.3)

2.2 Performance of the radio

General

Supply voltage range 10.2 to 16 V

Quiescent current: power off < 2 mA (typ.)

power on 550 mA (typ.)

Operating ambient temperature -30 to 80 °C

FM frequency range: Europe 87.5 to 108.0 MHz

USA 87.9 to 107.9 MHz

AM frequency range: Europe 144 to 288 kHz (LW)

531 to 1629 kHz (MW)
5900 to 6200 kHz (SW)

USA 530 to 1710 kHz (MW)

5900 to 6200 kHz (SW)

Application Note

96029

IF-frequency double conversion: FM-IF1/IF2 72.2MHz / 10.7 MHz

AM-IF1/IF2 10.7 MHz / 450 kHz

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Philips Semiconductors

User Manual of High-End RDS/EON
Car Radio System CCR612 (V0.3)

FM characteristics

V

=14.4V, T

supply

aerial as shown in Figure 2.

Aerial input voltage (Vin), for -3 dB limiting (adjustable) 3 - 20 µV

for (S+N)/N = 26 dB 2.7 µV
for 10 dB crosstalk (stereo) 70 µV

Signal-to-noise ratio over most of the signal range 64 dB
RF signal handling capability for THD < 2% at 75kHz dev. > 2 V

=25°C,fo=98MHz, f

amb

Signal gen er ator

Figure 2 Dummy aerial to test the FM mode

50

=±22.5kHz, f

dev

Vin

=1kHz unlessotherwisespecified.Dummy

mod

1204.3

Radio aerial
input (150 O hm)

55

Application Note

96029

MPX output (RMS value) at pin 47 of the TEA6822 200 mV
AM suppression over most of the signal range > 55 dB
Total Harmonic Distortion over most of the signal range. 75 kHz dev. 0.5 % (typ.)

Adjacent signal selectivity (two signal method) S

200

>45 dB

IF suppression: IF1 (72.2 MHz) > 70 dB

IF2 (10.7 MHz) > 90 dB
Search sensitivity (adjustable) Vin > 4 µV
RDS sensitivity: Traffic Announcement Vin > 12 µV

Programme Identification Vin > 15 µV
IF counter resolution 6.25 kHz
Frequency grid (Europe): Search Tuning 100 kHz

Manual Tuning 50 kHz

Repetitive Manual tuning (after .5s) 100 kHz
Frequency grid (USA): SearchTuning 200 kHz

Manual Tuning 100 kHz

Repetitive Manual tuning (after .5s) 200 kHz

20

Philips Semiconductors

50

60

50

Signal generator

Vin

Radio aerial input

65 pF

15 pF

User Manual of High-End RDS/EON
Car Radio System CCR612 (V0.3)

AM characteristics

V

=14.4 V,T

supply

as shown in Figure 3.

Aerial input voltage (Vin),

for (S+N)/N = 26 dB MW 55 µV

=25°C, fo=999 kHz,m = 0.3, f

amb

=1 kHzunless otherwisespecified. Dummyaerial

mod

Figure 3 Dummy aerial to test the AM mode

LW 80 µV
SW t.b.f.

Application Note

96029

Signal-to-noise ratio for Vin=1mV > 55 dB

AGC range 5 mV/Vin for 10 dB variation of AF output > 60 dB

RF signal handling capability for THD < 10 % at m = 0.8 > 3 V

Total Harmonic Distortion over most of the

AGC range, m = 0.8, fmod = 1 kHz < 2 %

Total bandwidth B 3dB 4.5 kHz

Fidelity ( -3 dB ) 10 Hz - 2 kHz

IF suppression IF1 (10.7 MHz) > 70 dB

IF2 (450 KHz) > 100 dB

IF selectivity S

S

9
18

>55 dB
>60 dB

IF counter resolution 250 Hz

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Philips Semiconductors

User Manual of High-End RDS/EON
Car Radio System CCR612 (V0.3)

Frequency grid Europe

LW (search and manual tuning) 1 kHz
MW (search and manual tuning) 9 kHz
SW (search and manual tuning) 1 kHz

USA
MW (search and manual tuning) 10 kHz
SW (search and manual tuning) 1 kHz

Search sensitivity (adjustable) > 20 µV

Application Note

96029

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Philips Semiconductors

User Manual of High-End RDS/EON
Car Radio System CCR612 (V0.3)

3 SHORT SPECIFICATION

Tuning

Frequency bands:
Optionally the following frequency bands are used:

FM: 87.50 - 108.00 MHz (50/ 100 kHz steps) }
MW: 531 - 1629 kHz (9 kHz steps) } For application in Europe
LW: 144 - 288 kHz (1 kHz steps) }
SW: 5.9 - 6.2 MHz (1 kHz steps) }

FM: 87.90 - 107.90 MHz (100/ 200 kHz steps) }
MW: 530 - 1710 kHz (10 kHz steps) } For application in USA
SW: 5.9 - 6.2 MHz (1 kHz steps) }

PLL tuning principle

Manual tuning up / down
First one step, next after 0.5 seconds. Fast repetition at 12.5 times per second.

Application Note

96029

Local/Dx switching
The Local/Dx feature controls the search sensitivity. Default after switching on is always Dx.
In the TEA6811 a tuner attenuator for the FM-band is incorporated.

Search tuning up / down
Sensitivity is controlled by Local/Dx. If after one complete band sweep in Local mode no station is

found,the radioswitches automatically toDx. Duringsearch tuning therunning frequencyis displayed
and the radio is muted.

Frequency Scan
Continuous automatic search tuning, pausing for 6 seconds on every station.

AST (Automatic Store Tuning) for FM and MW band
AST switches to FM-AST or MW-AST band, searches for the6 strongest transmittersin the band and

stores them in the AST programme preset memory. In FM, duplication of PI codes will be avoided.

Programme preset memory
For each band (FM1, FM2, MW, LW, SW (49m), FM-AST and MW-AST) 6 programme presets and a

"manual" frequency are stored. In FM, additional RDS information is stored: PI code (Programme
Identification), PS name (Programme Service), AF list (Alternative Frequencies) and AF follow mode
on/off.

Whenever another band is selected, the radio reverts to the last frequency tuned to in the new band
(this can be either a preset frequency or a manually tuned frequency).

Programme preset up / down control
Programme presets can be stored and recalled by two key control (up and down) or by 6 separate

preset keys.

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Philips Semiconductors

User Manual of High-End RDS/EON

Application Note

Car Radio System CCR612 (V0.3)

AF follow mode
WhenAFfollowmode is on,the setwill regularlymeasure thesignalstrengthofalternativefrequencies

and compare it with the current station. If an alternative frequency offers better quality, the radio will
switch over and update the alternative frequency list. The measuring scheme is designed to cause
minimumnoticeabledisturbanceforthelistener.Theintervaltimebetweentwomeasurementsdepends
on the signal quality.

Intelligent preset programme recall
If an FM programme preset witha known PI code isrecalled, theprimary frequency and all alternative

frequenciesstoredinthe programme presetmemory areexamined.Thefrequencywith the bestsignal
qualitybroadcastingthecorrectPIcode will beselected. Only whenthe programme isnot foundon one
of the AFs, after 6 seconds a search is started for a station with a proper PI code.

TA mode
In TA mode the radio only searches for transmitters that transmit the RDS traffic programme on the

same station or on EON linked stations.The radio willautomatically start asearch when switching TA
mode on and the current station is not a traffic station.

PTY scan mode
In PTY scan mode the radio searches for transmitters that transmit the user-selected PTY code.

Dependentonthefactoryoption USA/Europe the RBDSPTY-table or theRDS PTY-tableis used.Only
English PTY messages are available.

96029

Laststatusmemory: band, frequency,PI code,AFfollowmode on/off statusand TAmodeon/offstatus
are stored in memory. This status is recalled during switch on.

RDS

Bit, block and group synchronisation. (inclusive RBDS E-block detection).

Data collection and decoding of:

- PI, Programme Identification code

- AF, Alternative Frequencies

- TP, Traffic Programme

- TA, Traffic Announcement

- PS, ProgrammeService name

- PTY, Programme TYpe

- EON, Enhanced Other Network

AF follow mode using PI and AF (see also Tuning).

Display of the programme service name in 8 alpha-numeric characters (PS name).

Display of AF, TP, TA, PTY, EON and Regional mode status via icons.

Regional mode on/off switching. When Regional mode is on, the radio will, during AF switching, only
switch over to stations with exactly the same PI-code. When Regional mode is off, the radio will also

24

Philips Semiconductors

User Manual of High-End RDS/EON

Application Note

Car Radio System CCR612 (V0.3)

switch over to stations broadcasting regional variants of the original station. (so called "generic" or
"family"PI codes). For USA application (RBDS) the regional function will only work for PI codesabove
B000
with exactly the same PI code.

Break-inoftraffic announcements ispossible iftheTAoption is switchedon.ThePTY alarm messages
break-in always. Break in is possible even when the radio is muted or in CD-changer / cassette /
external mode.

User Control

Upto27Localcontrolkeysoneither a fixed, a detachablekeyboard or acombination. Triangular matrix
using 7 lines.

Detachable front
Optionally, the keyboard and the LCD display unit can be placed on a detachable front controlled by

a2ndI2C bus.Only 5 contacts are required to connect the detachable front (6 if it hosts also the power
key). No extra hardware is required to detect its presence.

. PI codes below B000

hex

do not have regional variants. Af switching is only allowed to stations

hex

96029

EON

If the TA option is on, switch temporarily to an other station if EON information indicates a traffic
announcementonanothernetworkevenwhentheradioismutedorinCD-changer/cassette / external
mode.

Maintain lists of alternative frequencies of other stations stored in preset memory with information
received via EON on the currently tuned station.

Displayby means ofan iconwhether EON datais received andwhether an EONtraffic announcement
is broadcast.

Display

143 Segment LCD with Umlaut (ü) characters, 1:4 multiplexed divided into:

8 Alphanumeric characters + decimal point are used to display:

- Band and frequency (Example: "FM 103.50")

- Indication "BALANCE", "FADER", "TREBLE", "BASS" and their value.

- RDS programme service name (PS) in 8 alphanumeric characters.

- RDS programme type (PTY)

- "MUTE", in case the user mutes the radio, cassette or external

- Cassette mode function such as "PLAY >", "CAS WIND", etc.

- CD-changer messages such as "CD 01.23" , "CHANGER " etc.

7 Segment display for the current programme preset number.

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Philips Semiconductors

User Manual of High-End RDS/EON

Application Note

Car Radio System CCR612 (V0.3)

15 Icons for display of:

- ST On when stereo pilot signal is detected and the radio is not in forced mono mode.

- AST Onwhen AST band is selected.

- SCAN On when in Frequency scan mode.

- AF On when AF follow mode is enabled (see also Tuning), flashing if no RDS data

received.

- TA On in TA mode and flashing during a traffic announcement in progress.

- TP On when a traffic station is received, flashing when the station is not a traffic station

and TA mode is on.

- PTY Onwhen a PTY code is received, flashing during PTY search.

- DOLBY On in cassette mode when dolby is on.

- MTL On in cassette mode when metal/chrome is selected.

- AMS On in cassette mode when AMS is on.

- REG On when the radio is in regional mode (see also RDS)

- EON On when EON data is received, flashing during an EON traffic announcement.

- LOC On when the radio is in Local mode (see also Tuning)

- LOUD On when Loudness is on.

- CLIP On when clipping is detected and clipping control is active.

96029

Non Volatile Memory

512 bytes EEPROM. The following information is stored in NVM:

System status e.g.: band, audio source (radio / CD-changer / cassette / external).
For each band FM1, FM2, FM-AST, MW, MW-AST, LW, SW(49m) : 6 preset frequencies, one non-

preset frequency and the last used preset number.
For each FM preset:

- PI-code

- PS Name

- AF List (9 AF’s)

- AF follow mode on/off.

Audio controls: volume, bass, treble, balance, fader and loudness.
Preprogramming EEPROM
At power-on the contents of the NVM is checked, when a non-initialized EEPROM is detected, the

EEPROM will be preprogrammed with default values.
Appendix II lists the default values written to NVM during initialization.

Sound

Volume, bass, treble, balance and fader control with VOL-UP / VOL-DOWN keys.
Analog control select key to cycle through bass, treble, balance and fader.
Mute function.
Automatic muting during tuning and AST search (silent tuning).
Break-inof trafficannouncements and PTY-alarmmessages (atincreased volume level,which isuser

programmable) when the radio is muted or in cassette / external mode.
Loudness function.

26

Philips Semiconductors

User Manual of High-End RDS/EON

Application Note

Car Radio System CCR612 (V0.3)

Sound settings are stored at switch-off and recalled at switch-on.
"Bleep" tone to confirm user actions such as storing a programme preset, entering AST mode, etc.
Mono / stereo function.
Output pins for mute, loudness and traffic announcement, for use with conventional audio control

circuitry.
Automatic mute of radio during "Phone mute" detection.

Power-amplifier

Power-amplifiers with diagnostic facilities
*1×TDA8561Q amplifier for 4 ×12W(2Ωload) or 4 ×7 W or 2 × 24 W bridged application.(both at

4Ω load)
*1×TDA8562Q amplifier for 4 × 12W(2Ωload) or 4 × 7W(4Ωload)
*2×TDA8561Q amplifier for 4 × 24 W bridged application. (4Ω load)
Diagnostic control:
* short-circuit or too high temperature detection, display an error message
* signal clipping, via an icon and stepwise decrease of bass and or volume
Optional conventional power-amplifiers (without diagnostics) can be used such as two TDA1552Q for

4 × 22 W, one TDA1554Q for 4 × 11W(2Ωload) or 4 × 6W(4Ωload) or one TDA1552Q 2 × 22Win
a BTL stereo configuration.

96029

Options

Diode programmable

- Detachable front

- Available frequency bands

- Static on/off switch

- Frequency band limits and tuning grid for different parts of the world. This option also selects

between RDS (Europe) and RBDS (USA).

User programmable

- 2 / 4 Loudspeakers

- Loudness on / off

- TA volume level

Automatically detected

- Digital sound control chip or conventional audio control circuitry

- Loudness

- AMS }

- Dolby } Cassette deck functions

- MTL }

- Presence of the CD-changer (check during power-on)

- Availability of a power amplifier with diagnostics facilities

27

Philips Semiconductors

User Manual of High-End RDS/EON

Application Note

Car Radio System CCR612 (V0.3)

Power connections

Continuous power supply input. Normally connected directly to the car battery. All supply power is
drawn from this supply.

Ignition key input. Normally connected to the accessory contact of the ignition switch. Used only for
switchingthe radioon/off. This inputis alsoused when the static on/offswitch optionis chosen instead
of the momentary on/off key.

Switching on/off

Recallof last system status (e.g.:frequency,band,soundcontrolsettings,RDSstatusandlastselected
audio source).

Switch on by:

- Power key, can be static or momentary.

- Ignition contact (after the set was switched off by turning the ignition contact off).

Switch off by:

- Power key, can be static or momentary.

- Ignition contact.

- Removal of detachable keyboard.

When switched on while the ignition contact is (and remains) off, the set will automatically switch off
after 60 minutes.

The radio will switch on again when switched off due to a power dip during engine start.

96029

CD-changer

Radio/CD-changer/Cassette/External mode key.
Disc up/down keys for selecting the next/previous disc.
Track up/down keys for selecting the next/previous track.
Fast forward/reverse keys for jumping some grooves forward/backward.
Shuffle on/off key, for playing the tracks in random order. (The user can make a selection between

tracks on the current disc only or tracks on all discs.)
Repeat on/off key, for repetitive play of the current track or the current disc.
Intro-scankey.When Intro-scan modeison, each trackofthecurrent disc orthefirst track ofeverydisc

(user selectable) are played for 10 seconds in successive order.

28

Philips Semiconductors

User Manual of High-End RDS/EON

Application Note

Car Radio System CCR612 (V0.3)

Cassette

Automatically switches to cassette mode after insertion of a tape
Interfaces with a mechanically controlled cassette deck
Play/wind mode detection
Play direction detection for auto-reverse cassette decks
Cassette solenoid control
AMS pause detection for full AMS control
Radio sound during cassette winding
MTL on/off key
DOLBY on/off key
AMS on/off key
CD-changer/Cassette/Radio/External mode key
Optional source switching to externalmode (external plugis in) or always to radio mode (option diode

D6 is present) when the tape is ejected.

External audio input:

Automatically switches to external audio source when a connector is inserted.
CD-changer/External/radio/Cassette mode key.
Optional source switching to cassette mode (tape is in) or always to radio mode (option diode D6 is

present) when the external plug is removed.

96029

29