P83CE258 for High-End RDS/EON Car Radio System CCR520S V2.5

Application Note
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Outline Specification of High-End
RDS/EON Car Radio System
CCR520S V2.5
Report No: AN96007
A. Demmers
M. Verheijden
Product Concept & Application Laboratory Eindhoven, the Netherlands.
Keywords
Car Radio
Radio Data System
Radio Broadcast Data System
EON
CCR520S
P83CE528
Clock function
Date : February 1996
Pages: 18
i
This Outline Specification is valid for CCR520S software release V2.5.
Modifications with respect to the application note "Outline Specification of Computer Controlled Car
Radio System CCR520S V2.0", report number AN95033 :
1.
2.
NVM Initialization added.
Clock with synchronisation to RDS added
Modifications with respect to the application note "Outline Specification of Computer Controlled Car
Radio System CCR520S V1.5", report number ERA/AN93008 :
1.
USA option added for RBDS and USA band limits / tuning grid.
2.
Allow AF-switching to Supra-regional transmitters for RDS.
3.
PTY functionality.
4.
During AST running frequency is not displayed anymore.
5.
The TA / PTY Alarm volume level is programmable.
6.
Improved RDS decoding and AF switching behaviour especially with respect to multipath.
7.
Improved EON preset update.
Philips Semiconductors Application Note
AN96007
ii
SUMMARY:
CCR520 is a computer controlled high-end AM/FM car radio system with RDS/RBDS decoding. It is
based on a single 8051 family microcontroller (P83CE528) 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, clock function and a detachable front.
Radio control and RDS/RBDS+EON processing are combined in a single microcontroller.
"The purchase of Philips’ complete set of Integrated Circuits as specified in this Outline Specification
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 Philips' I²C patent to use the components in the I²C-system
provided the system conforms to the I²C specifications defined
by Philips.
(C)
Philips Export B.V.
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 of its use. Publication thereof does not convey nor imply any licence
under patent- or other industrial or intellectual property rights.
Philips Semiconductors Application Note
AN96007
iii
TABLE OF CONTENTS:
page
1 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1
2 BASIC HARDWARE CONFIGURATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2
3 SHORT SPECIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5
4 TARGET CHARACTERISTICS OF THE RADIO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
5 MICROCONTROLLER AND PIN ASSIGNMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6 KEYBOARD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
7 OPTION DIODES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
8 LCD DISPLAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
LIST OF FIGURES
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
Figure
1 Block diagram of CCR520 with fixed keyboard . . . .
2 Block diagram of CCR520 with detachable keyboard
3 Dummy aerial to test the FM mode . . . . . . . . . . . .
4 Dummy aerial to test the AM mode . . . . . . . . . . . .
5 Pinning of CCR520S for fixed front . . . . . . . . . . . .
6 Keyboard configuration for fixed front . . . . . . . . . . .
7 Pinning of CCR520S for detachable front . . . . . . . .
8 Keyboard configuration for detachable front . . . . . .
9 Location of option diodes . . . . . . . . . . . . . . . . . . .
10 Liquid Crystal Display (LCD) layout . . . . . . . . . . .
Philips Semiconductors Application Note
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2
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12
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18
18
AN96007
1
1 INTRODUCTION
CCR520S is a computer controlled system based on a P83CE528 microcontroller. It controls a high-end
AM/FM car radio with RDS (Radio Data System) or RBDS (Radio Broadcast Data System) and EON
(Enhanced Other Networks information) and various I2C-bus controlled peripherals.
The
-
-
-
-
main features are:
Radio control and RDS/RBDS decoding in a single microcontroller.
Bands:
FM, MW, LW. (Factory selectable FM only / LW disable)
Tuning: manual, automatic (search and scan), Automatic Store Tuning (AST), selectable tuning
grid and band limits for different parts of the world (Europe/USA option).
Presets: 18 FM, 12 MW, 6 LW.
External audio jack for e.g. CD player.
Controls power stabilizer IC.
PLL frequency synthesizer.
Sound control: volume, bass, treble, balance, fader, loudness and mute via I2C-bus or
potentiometers.
RDS/RBDS functions:
PS
Programme Service name display and storage in Non Volatile Memory;
PTY
Programme TYpe display and searching;
TP/TA Traffic Announcements break-in;
AF/PI Alternative Frequency follow and storage in Non Volatile Memory;
EON Enhanced Other Networks traffic announcements and update of preset AF lists in
NVM.
TIME Time information extraction for clock function.
Security code:
- enable/disable by the user;
- preprogrammable in the factory by means of a service mode.
Non Volatile Memory for: programme presets;
RDS/RBDS information;
System status.
LCD display with 120 or 144 segments.
Keyboard optionally detachable with up to 27 key functions.
Clock function
NOTE: RBDS is an extension of the European RDS system. Every reference in this document to RDS
is also valid for the RBDS system, unless specified otherwise.
Philips Semiconductors Application Note
AN96007
2
2 BASIC HARDWARE CONFIGURATION
The basic configuration of the computer controlled car radio system CCR520 is given in the figures
below.
External
audio input
Cassette
audio input
DIFFERENTIAL
LINE AMP.
TDA8579
FM / AM
L
FM
FR O N T EN D
TD A1 57 4
F osc
IF SYSTEM
TEA6100
Vtun
T DA 15 52 Q
or
T DA 15 54 Q
RDS
D E MO D .
SAA6579
EE PR O M
PCF8582
PCF8594
RDSCLK
RDSDAT
F osc
AM I F
10 . 7 M Hz
A M T U NE R
T EA 6 20 0
R
POWER
AMP
IIC -BU S
40 k Hz
PLL
SYNTHESIZER
TS A60 57
Vtun
IAC &
STEREO DEC.
TDA 1591
AF CONTRO L
TEA6330T
OR
TDA1526
V O L T AG E
STABI LIZER
TD A3 60 2
LCD DRIVER
PCF85 76 or
2 X PC F8566
MICRO CONTRO LLER
CCR520S
( P83CE528)
EXTERNAL
JACK
CASSETTE
INTERFACE
LCD
DISPLAY
Figure 1 Block diagram of CCR520 with fixed keyboard
Philips Semiconductors Application Note
AN96007
3
External
audio input
Cassette
audio input
D IF F ER EN T IA L
L IN E A MP .
TDA8579
FM / AM
L
FM
FR O NT E ND
TD A15 74
F osc
IAC &
STEREO DEC.
TDA 1591
IF SYSTEM
TEA6100
Vtun
RDS
DEMOD.
SAA6579
A M TU N E R
T EA 6 20 0
T DA 1 5 52 Q
or
T DA 1 5 54 Q
E EP RO M
PCF8582
PCF8594
RDSCLK
RDSDAT
F osc
AM I F
10 . 7 M Hz
R
POWER
AMP
IIC - BU S
40 k Hz
PLL
SYNTHESIZER
TS A60 57
Vtun
AF CO NTRO L
TEA6330T
OR
TDA1526
V O L T AG E
STABI LIZER
TD A3 60 2
MICRO CONTRO LLER
CCR520S
( P83CE528)
IIC - BU S
D E T A CH A B L E
KEYBOARD
SCAN NER
P C F8 5 7 4
CASSETTE
INTERFACE
E X T ER N A L
JACK
LCD DRIVER
PCF8576 or
2 X PCF8566
LC D
DISPLAY
Figure 2 Block diagram of CCR520 with detachable keyboard
Philips Semiconductors Application Note
AN96007
4
The CCR520 concept requires the next IC’s to be present in the system:
- TDA1574(T)
Performs all the FM front-end functions, except the R.F. pre-amplifier stage.
Incorporates an FM/IF pre-amplifier.
- TEA6200
AM tuner, up-conversion system. Does not need an aerial tuned circuit. I.F.
frequency 10.7 MHz. No alignments needed.
- TEA6100
Integrated FM/IF system including a digital AM/FM tuning interface for
microcomputer controlled radios with an I2C-bus.
- TSA6057(T)
PLL synthesizer with separate prescalers for AM and FM and loop filter
outputs. I2C-bus controlled.
- TDA1591(T)
System combination of adjustment free PLL stereo decoder with de-emphasis
control and an Interference Absorption Circuit (IAC) with low component count.
Specially designed for car radios.
- TEA6330T or
- TDA1526
I2C-bus (TEA6330) or potentiometer (TDA1526) controlled AF pre-amplifier
for car and home receivers. Includes volume, bass, treble, balance, fader
(TEA6330) control and mute (TEA6330).
- CCR520S
The microcontroller, based on a P83CE528EFB. It is a 8051 derivative with an
8-bit CPU, 32 Kbytes ROM, 512 bytes RAM and four 8-bits I/O ports in a 44pin QFP package.
- TDA3602
Supply voltage stabilizer in SIL package with three output voltages (2 x 5V and
8.5V). Two outputs are switchable by external controls.
- TDA1552Q
Class-B audio power amplifiers in SIL plastic package with 4 identical
amplifiers.
The TDA1552Q can deliver 2 x 22 W in BTL configuration, the TDA1554Q can
deliver either 4 x 11 W or 2 X 22 W.
TDA1554Q
- SAA6579(T)
RDS demodulator with onboard 57 kHz bandpass filter and a digital
demodulator. Outputs a digital data signal and a clock signal for further
processing.
- PCF8566T
PCF8576T
LCD display drivers that interface to almost any liquid crystal display (LCD)
having low multiplex rates. They generate the drive signals for any static or
multiplexed LCD with up to four backplanes and up to 24 (PCF8566) or 40
(PCF8676) segment lines and can easily be cascaded for larger LCD
applications. I2C-bus controlled.
- PCF8582/94E-2P/T
256/512 byte 5V electrically erasable programmable read only memories
(EEPROM) that can be 100,000 times re-written.
- PCF8574(T)
Detachable Keyboard Scanner. I2C-bus controlled.
- TDA8579(T)
Differential Line Amplifier for external input.
Philips Semiconductors Application Note
AN96007
5
3 SHORT SPECIFICATION
Tuning:
- Frequency bands:
Optionally the following frequency bands are used:
FM: 87.50
MW: 531
LW: 144
- 108.00 MHz (50 / 100 kHz steps)
- 1629 kHz (1 / 9 kHz steps)
- 288
kHz (1 kHz steps)
}
} For application in Europe
}
FM: 87.90
AM: 530
- 107.90 MHz (100 / 200 kHz steps)
- 1710 kHz (1 / 10 kHz steps)
} For application in USA
}
- PLL tuning principle.
- Manual tuning up / down.
Initially slow pace / fine grid. After 2.5 sec. fast pace / coarse grid.
- Local/DX switch.
The local/DX feature controls the search sensitivity. If the FM tuner has a tuner
attenuator, the local/DX switch controls the attenuator during search. If not, it controls the
signal level threshold during search. Default after switching on is always DX mode.
- Automatic search tuning up / down.
Sensitivity is controlled by local/DX. If after one complete band sweep in local mode no
station is found, the radio switches automatically to DX. Automatic muting and display of
running frequency.
- 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 the 6 strongest transmitters 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, 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 recalled/stored by two key control (up and down) or by 6
separate preset keys.
Philips Semiconductors Application Note
AN96007
6
- AF follow mode.
If AF follow mode is on, the set will regularly measure the signal strength on alternative
frequencies 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 minimum noticeable disturbance for the listener.
The interval time between two measurements depends on the signal quality.
- Intelligent preset programme recall.
If an FM programme preset with a known PI code is recalled, the primary frequency and
all alternative frequencies stored in NVM are examined. The frequency with the highest
signal strength that broadcasts the correct PI code will be selected. Only when the
programme is not found on one of the AFs, a search is started after 6 seconds for a
station with the proper PI code.
- TA mode.
In TA mode the radio only searches for traffic stations. These are stations that may
transmit (EON) traffic announcements.
The radio will automatically start a search when switching TA mode on and the current
station is not a traffic station.
- PTY search mode.
In PTY search mode the radio only searches for transmitters that transmit a user-selected
PTY code.
Dependent on the factory option USA/Europe the RBDS PTY-table or the RDS PTY-table
is used.
- Last status memory: frequency, PI code, PS Name, AF lists and AF follow mode on/off
status are stored in memory for each preset in each band. This status is recalled during
preset switch, band switch and switch on.
RDS:
- Bit, block and group synchronisation (inclusive RBDS E-block detection).
- Data decoding and collection of:
- PI,
Programme Identification code;
- AF,
Alternative Frequencies;
- TP,
Traffic Programme;
- TA,
Traffic Announcement;
- PS,
Programme Service name;
- PTY, Programme TYpe;
- EON, Enhanced Other Networks information;
- TIME, Time information.
- 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 and regional mode status.
Philips Semiconductors Application Note
AN96007
7
- 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 or Supra-regional
code. When regional mode is off, the radio will also switch over to stations broadcasting
regional variants of the original PI-code. (so called "generic" or "family" PI-codes). For
USA application (RBDS) the regional function will only work for PI codes above B000hex.
PI codes below B000hex don’t have regional variants. (AF-switching is only allowed to
stations with exactly the same PI code).
- Break-in of traffic announcements and PTY alarm messages when the radio is muted or
in Cassette / External mode.
EON:
- Temporally switch to an other station if EON information indicates a traffic announcement
on that other station even when the radio is muted or in Cassette / External mode.
- Update lists of alternative frequencies of other stations stored in preset memory with
information received via EON.
Detachable front:
- Optionally, the keyboard and the LCD display unit can be placed on a detachable front,
controlled by a 2nd I2C 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.
Control:
Clock
Display:
- Up to 27 local control keys on either a fixed, a detachable keyboard or a combination.
: - A twenty four hour clock can be displayed if RDS time information has been received.
- 120 Segment LCD or 144 Segment LCD with Umlaut (ü) and Accent (á) characters, 1:3
multiplexed.
- 8 Alphanumeric characters + decimal point are used for display of:
- Band and frequency (Example: "FM 103.50")
- Indication "BALANCE", "FADER", "TREBLE", "BASS" and their position (either
analog bar or digital)
- The security code being entered
- 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.
- Clock display can be: " 08.12" or " --.--" if not yet synchronised to RDS clock.
- 7 Segment display for the current programme preset number.
Philips Semiconductors Application Note
AN96007
8
- 8 Icons for display of:
- STEREO
On when stereo pilot signal is detected, off when forced mono is
selected or no stereo pilot signal is detected.
- AST
On when AST band selected.
- AF
On when AF follow mode is enabled (see also Tuning). Flashes 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
On when PTY code received, flashing during PTY search.
- DOLBY
On in cassette mode when dolby selected.
- ME/CR
On in cassette mode when ME/CR selected.
Non Volatile Memory:
Either 256 or 512 bytes. The amount of memory determines the maximum number of
alternative frequencies to be stored per preset (5/9 AF’s for 256/512 bytes EEPROM).
The next information is stored in NVM:
- Checksum to verify whether an EEPROM has been initialized or not. If a not initialized
EEPROM has been detected default values will be stored to insure reasonable settings
for e.g. the audio control values.
- System status e.g.: band, audio source (radio / cassette / external).
- User programmable options.
- For each band (FM1, FM2, FM-AST, MW1, MW-AST, LW): six preset frequencies and
one non-preset frequency, last used preset.
- For
-
each stored FM frequency:
PI-code
PS Name (512 byte EEPROM only)
AF List (9 AF’s maximum, 5 AF’s for 256 byte EEPROM)
AF follow mode on/off.
- Audio controls: volume, bass, treble, fader, balance and loudness.
- Four digit security code (0000 - 9999).
- Security code can be preprogrammed with the keyboard by means of a service
mode, or a preprogrammed EEPROM has to be used.
- Security code can not be changed by the user. The security code can be enabled
or disabled by the user; enable/disable status is stored in NVM.
- If enabled, the security code must be entered each time the main supply line has
been interrupted or the radio has been removed from the retrack.
Philips Semiconductors Application Note
AN96007
9
External audio input:
- Automatically switches to external audio source when a connector is inserted.
- External/radio mode key.
- Optional source switching to cassette mode (cassette is in) or always to radio mode
(option diode D6 is in) when the external plug is removed.
Sound:
- Volume, balance, fader, treble and bass control with vol-up/down keys.
- Analog control select key to cycle through balance, fader, treble and bass.
- Mute key
- Automatic muting during tuning and AST search (silent tuning).
- Break-in of traffic announcements (in TA mode) and PTY-alarm messages when the radio
is muted or in cassette / external mode. The volume level during a TA / PTY message
can be installed to one of 5 fixed by means of the user programmable options.
- Loudness switching.
- 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.
Power-amplifier:
- Conventional power-amplifiers can be used such as two TDA1552Q (4 x 22 Watt), one
TDA1554Q (4 x 11 Watt (2 Ω load) or 6 Watt (4 Ω load)) or one TDA1552Q (2 x 22 Watt
(4 Ω load)) in a BTL stereo configuration.
Options:
Diode programmable
- Detachable front
- No LW band
- FM only
- No security code
- Static on/off switch
- Method of source switching
- Application area of the radio (USA/Europe)
Philips Semiconductors Application Note
AN96007
10
User programmable
- 2 / 4 Loudspeakers
- Loudness on/off
- Bar / digital sound control display
- TA / PTY Alarm volume level
- Security code enable/disable
Automatically detected
- Digital sound control chip or conventional controls
- 120 / 144 segment LCD display
- 256 or 512 bytes EEPROM
- Loudness
- Local/DX FM Tuner Control
- AMS )
- Dolby ) Cassette deck functions
- ME/CR )
Power connections:
- Continuous power supply input. Normally connected directly to the car battery. All supply
power is drawn from this input.
- Ignition key input. Normally connected to the accessory contact of the ignition switch.
Used for switching the radio on/off by the ignition key.
This input is also used when the static on/off switch option is chosen instead of the
momentary on/off key. In this case the static on/off switch button is connected to the
ignition key input.
Switching-on/off:
- Recall of last system status (e.g.: frequency, band, sound control settings, RDS status
and last selected audio source).
- Switch on by:
- Power key, can be static or momentary.
- Ignition contact (after the set was switched off by turning the ignition off).
- Switch off by:
- Power key, can be static or momentary.
- Ignition contact.
- Removal of detachable keyboard.
- Opening of the security contact.
- Wrong security code entered (after 30 to 40 seconds).
- 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.
Philips Semiconductors Application Note
AN96007
11
Cassette: -
Automatically switches to cassette mode after insertion of a cassette
Interfaces with a mechanically controlled cassette deck
Play/wind mode detection
Play direction detection for auto-reverse cassette decks
Radio reception during wind mode
Cassette/Radio mode key
Metal/Chromium tape on/off key
DOLBY system on/off key
AMS (Auto Music Search) on/off key
Optional source switching to external mode (cd plug is in) or always to radio mode (option
diode D6 is in) when the cassette is ejected.
Philips Semiconductors Application Note
AN96007
12
4 TARGET CHARACTERISTICS OF THE RADIO
General
Supply voltage range
Quiescent current,
10.2
to
-30
87.5
87.9
144
531
530
to
to
to
to
to
to
power off
power on
Operating ambient temperature
FM frequency range
Europe
USA
AM frequency range
Europe
USA
IF-frequency (AM and FM)
16
2
520
75
108
107.9
288
1629
1710
10.7
V
mA (typ.)
mA (typ.)
°C
MHz
MHz
kHz (LW)
kHz (MW)
kHz (MW)
MHz
FM characteristics
4.3
12 0
Radio aerial
in put (15 0 Oh m)
50
Vsupply = 14.4 V,
Tamb = 25 °C,
fo = 98 MHz,
fdev = 22.5 kHz,
fmod = 1 kHz unless otherwise specified.
Dummy aerial as shown in Figure 3.
Vin
55
Signal generator
Figure 3 Dummy aerial to test the FM mode
Aerial input voltage (Vin), for -3 dB limiting (fmod = 400 Hz)
for (S+N)/N = 26 dB
for 10 dB crosstalk (stereo)
10
3
150
µV
µV
µV
Signal-to-noise ratio over most of the signal range
RF signal handling capability for THD < 2% at 75kHz dev.
60
> 2
dB
V
AF output over most of the signal range
measured at pin 11 of IF module TEA6100.
AM suppression over most of the signal range
Total Harmonic Distortion over most of the signal range. 75 kHz dev.
150
> 50
0.5
mV
dB
% (typ.)
Adjacent signal selectivity (two signal method) S200
IF bandwidth 3dB bandwidth
IF suppression
> 44
160
> 85
dB
kHz
dB
> 20
> 14
> 16
6.4
100
50
100
µV
µV
µV
kHz
kHz
kHz
kHz
Search sensitivity
RDS sensitivity:
IF counter resolution
Frequency grid
Traffic Announcement
PService Name
Search Tuning
Manual Tuning
Philips Semiconductors Application Note
Vin
Vin
Vin
Europe
USA
AN96007
13
AM characteristics
60
Vsupply = 14.4 V,
Tamb = 25 °C,
fo = 999 kHz,
m = 0.3,
fmod = 1 kHz unless otherwise specified.
Dummy aerial as shown in Figure 4.
15 pF
Radio aerial input
50
Vin
50
65 pF
Signal generator
Figure 4 Dummy aerial to test the AM mode
Aerial input voltage (Vin),
for (S+N)/N = 26 dB
MW
LW
45
70
µV
µV
Signal-to-noise ratio for Vin = 1 mV
> 45
dB
AGC range Vin/500 mW for 10 dB variation of AF output
90
dB
RF signal handling capability for THD < 10 % at m = 0.8
1.4
V
Total Harmonic Distortion over most of the
AGC range, m = 0.8, fmod = 400 Hz
Total bandwidth B 3dB
< 2
5
Fidelity ( -3 dB )
30 Hz - 2
%
kHz
kHz
IF suppression tuned frequency 1400 kHz, Vin = 20 µV
62
dB
Image rejection tuned frequency 1400 kHz, Vin = 20 µV
76
dB
IF selectivity
36
66
dB
dB
IF counter resolution
500
Hz
Frequency grid,
LW (search and manual tuning)
MW (search tuning)
Europe
MW (manual tuning)
MW (search tuning)
USA
MW (manual tuning)
1
9
1
10
1
kHz
kHz
kHz
kHz
kHz
Search sensitivity
S9
S20
Vin
Philips Semiconductors Application Note
> 45
µV
AN96007
14
5 MICROCONTROLLER AND PIN ASSIGNMENTS
CCR520S is based on a P83CE528 microcontroller. It is single-chip microcontroller, manufactured in
an advanced CMOS process and is a derivative of the 80C51 microcontroller family.
P1. 5
P1. 6
P1. 7
RST
P3. 0
Vss
P 3. 1
P3. 2
P3. 3
P3. 4
P3. 5
P0. 4
P0. 5
P0. 6
P0. 7
EA
Vss
ALE
PSEN
P2. 7
P2. 6
P2. 5
CCR520S
(P83CE528)
P3.6
P3.7
XTAL2
XTAL1
Vss
Vdd
P2.0
P2.1
P2.2
P2.3
P2.4
1
2
3
4
5
6
7
8
9
10
11
33
32
31
30
29
28
27
26
25
24
23
RM UT E
CM UT E
TA
ON
EA
Vs s
ALE
PSEN
H OLD
KEYB6
KEYB5
RDSDAT
EXMUTE
XTAL2
XTAL1
Vss
Vdd
KEYB0
KEYB1
KEYB2
KEYB3
KEYB4
12
13
14
15
16
17
18
19
20
21
22
EXSTAT
SCL
SDA
R ESET
C M EC R
Vs s
PILOT
R DSCL K
SECUR
BLPTST
C DO LBY
P1.4
P1.3
P1.2
P1.1
P1.0
Vss
V dd
P0.0
P0.1
P0.2
P 0.3
44
43
42
41
40
39
38
37
36
35
34
CENABL
AUMUTE
LOUDN
LO/DX
OPTROW
Vss
Vdd
CPLYWD
IGN
CINDRV
CDIR
The pin assignments for CCR520S are given in Figure 5 and Figure 7.
Figure 6 and Figure 8 show the keyboard configurations for the fixed and detachable front respectively.
Figure 5 Pinning of CCR520S for fixed front
18
P2.0 KEYB0
P1
19
P2.1 KEYB1
P4 /
P3
AMS
P2
LOCAL/
DX
PRE DOWN/
LOUD/
RESET
20
P2.2 KEYB2
P6 /
P5 /
DOLBY
MECR
AF/
REG
FREQ
VOL
DOWN
DOWN
CCR520S
21
P2.3 KEYB3
AUTO/
MAN
22
P2.4 KEYB4
MODE
DOLBY
23
P2.5 KEYB5
SEL. DISP.
SCAN
PRE UP/
STEREO
FREQ. UP
VOL UP
MECR
PTY
TA
AST
BAND
24
P2.6 KEYB6
MUTE
SELECT
POWER
Figure 6 Keyboard configuration for fixed front
Philips Semiconductors Application Note
AN96007
P1. 5
P1. 6
P1. 7
RST
P3. 0
Vss
P3. 1
P3. 2
P3. 3
P3. 4
P 3. 5
P0. 4
P0. 5
P0. 6
P 0. 7
EA
Vss
AL E
PSEN
P2. 7
P2. 6
P 2. 5
CCR520S
(P83CE528)
P3.6
P3.7
XTAL2
XTAL1
Vss
Vdd
P2.0
P2.1
P2 .2
P2.3
P2.4
1
2
3
4
5
6
7
8
9
10
11
33
32
31
30
29
28
27
26
25
24
23
RM U TE
CM U TE
TA
ON
EA
Vs s
AL E
PSEN
H OLD
SCL_FRONT
SDA_FRONT
RDSDAT
EXMUTE
XTAL2
XTAL1
Vss
V dd
KEYB0
KEYB1
KEYB2
AMS
KEYB4
12
13
14
15
16
17
18
19
20
21
22
EXSTAT
SCL
SDA
RE SE T
C M EC R
Vs s
PILOT
R DSCL K
SECUR
BLPTST
C D OL B Y
P1.4
P1.3
P1.2
P1.1
P1.0
Vss
Vdd
P0.0
P0 .1
P0.2
P0.3
44
CENABL
43
AUMUTE
42
LOUDN
41
LO/DX
40 OPTROW
39
Vss
38
Vdd
37
CPLYWD
36
IGN
35
CINDRV
34
CDIR
15
Figure 7 Pinning of CCR520S for detachable
front
4
P1
5
P4 /
AM S
P2
L O CAL /
DX
PR E D O WN /
LOU D/
RESET
DO L BY
P3
6
P6 /
P5 /
DO LBY
M EC R
AF /
REG
F REQ
VO L
DOWN
DOWN
7
DETACHABLE
KEYBOARD
AU T O /
SCANNER
MAN
9
PCF8574
MODE
10
15
SEL . DISP.
SCAN
PR E U P/
ST E R EO
F REQ. U P
M EC R
PTY
TA
AS T
B AN D
11
MU TE
SDA
23
SCL
24
P2.5 SDA_FRONT
VOL U P
14
P2.6 SCL_FRONT
SEL EC T
CCR520S
18
P2.0 KEYB0
SC AN
19
P2.1 KEYB1
F R EQ .
LOU D/
DOWN
R E SE T
20
P2.2 KEYB2
PT Y
TA
F REQ .
UP
22
P2.4 KEYB4
AF /
SEL .
REG
DI SP.
L O CAL /
POWER
DX
Figure 8 Keyboard configuration for detachable front
When the detachable keyboard option is chosen it is not necessary to use all the keys in the small fixed
keyboard. At least the power key should be mounted when is chosen for the momentary on/off key.
(Static on/off switch option disabled)
Philips Semiconductors Application Note
AN96007
16
The following table gives a short description of all pins.
PIN
NAME
I/O
DESCRIPTION
1
2
3
4
5
6+16+28+39
7
8
9
10
11
12
13
14
15
17+38
18
19
20
21
22
23
24
25
26
27
29
30
31
32
33
34
35
36
37
40
41
42
43
44
EXSTAT
SCL
SDA
RESET
CMECR
Vss
PILOT
RDSCLK
SECUR
BLPTST
CDOLBY
RDSDAT
EXMUTE
XTAL2
XTAL1
Vdd
KEYB0
KEYB1
KEYB2
KEYB3
KEYB4
KEYB5
KEYB6
HOLD
/PSEN
ALE
/EA
ON
TA
CMUTE
RMUTE
CDIR
CINDRV
IGN
CPLYWD
OPTROW
LO/DX
LOUDN
AUMUTE
CENABL
I
I/O
I/O
I
I/O
Status of external audio jack
I2C Bus Clock line
I2C Bus Data line
Device reset
Cassette ME/CR select
GROUND
Stereo indication / mono/stereo control
RDS Clock from RDS demodulator
Security contact
Bleep output / Test input (service mode)
Cassette dolby select
RDS Data from RDS demodulator
Mute external audio source
Oscillator output
Oscillator input
+ 5 V supply voltage
Keyboard matrix line 0
Keyboard matrix line 1
Keyboard matrix line 2
Keyboard matrix line 3 /
AMS select
Keyboard matric line 4
Keyboard matric line 5 /
detach. I2C Data
Keyboard matric line 6 /
detach. I2C Clock
Power supply OK in
Program Store Enable (n.c.)
Address Latch Enable (n.c.) (disabled)
External Access (connect pull-up)
Power supply on control
Traffic announcement in progress
Cassette mute
Radio mute
Cassette direction (forward/reverse)
Cassette In drive
Ignition contact status or static on/off switch
Cassette play/wind mode
Option row output
Local / DX control
Loudness
General audio mute
Cassette enable
I/O
I
I
I/O
I/O
I
O
O
I
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I
O
O
I
O
O
O
O
I
I
I
I
O
I/O
I/O
O
O
Philips Semiconductors Application Note
AN96007
17
6 KEYBOARD
The keyboard consists of a 7-line triangular matrix connected to the microcontroller or the I/O expander
PCF8574. The following table lists the available keys.
NAME
DESCRIPTION
P1
P2
P3
P 4 / AMS
P 5 / ME/CR
P 6 / dolby
POWER
VOL-UP
VOL-DOWN
SELECT
MUTE
FREQ-UP
FREQ-DOWN
AUTO/MANUAL
BAND
AST
AF / REG
TA
PTY
LOUD / RESET
MODE
LOCAL / DX
STEREO
PRE-UP / ME/CR
PRE-DOWN / dolby
SCAN
DISPLAY
Preset-1
Preset-2
Preset-3
Preset-4 /
Auto Music Search on/off (cassette)
Preset-5 /
Metal/Chromium on/off (cassette)
Preset-6 /
dolby on/off (cassette)
Power on/off (momentary on/off key)
Analog sound setting up
Analog sound setting down
Select analog function for update
Mute on/off
Manual / search tuning upward
Manual / search tuning downward
Switch between manual / search tuning
Cycle through bands
Automatic search tuning band select and programming
RDS AF follow mode on/off / regional mode on/off
RDS traffic information mode on/off
Display current PTY / enter PTY search mode
Loudness on/off / Sound settings reset
Radio / cassette / external selection (/when pressed long, display clock)
Local / DX selection
Suppress/enable stereo mode
Programme preset up
/
Metal/Chromium on/off (cassette)
Programme preset down
/
Dolby on/off (cassette)
Automatic frequency scan
Select display ( Clock display / PTY / frequency / PS name)
Philips Semiconductors Application Note
AN96007
18
P1.4
P1.3
P1.2
P1.1
P1.0
Vss
Vd d
P0.0
P0.1
P0.2
P0.3
P1 .5
P1.6
P1 .7
RST
P3 .0
Vss
P3 .1
P3 .2
P3 .3
P3.4
P3.5
P0 .4
P0.5
P0 .6
P0 .7
EA
Vss
AL E
PS EN
P2 .7
P2.6
P2.5
CCR520S
(P83CE528)
33
32
31
30
29
28
27
26
25
24
23
D6
D3
RMUTE
CMUTE
TA
D4
D5
D7
D2
KEYB1
EXMUTE
D7
1
2
3
4
5
6
7
8
9
BLPTST 1 0
11
Detachable front
FM Only
No LW band
No security
Static on/off switch
Method of source
switching
USA Application
P3.6
P3.7
XTAL2
XTAL1
Vss
Vdd
P2.0
P2.1
P2.2
P2.3
P2.4
D1
D2
D3
D4
D5
D6
Description
D1
12
13
14
15
16
17
18
19
20
21
22
Diode
44 CENABLE
43
42
41
40
39
38
37
36
35
34
7 OPTION DIODES
Figure 9 Location of option diodes
8 LCD DISPLAY
The Liquid Crystal Display (LCD) is driven by either one PCF8576 or two PCF8566’s. Figure 10 shows
all the segments of the display. To support the RDS programme service name (PS) feature, the display
is equipped with 8 alpha numeric characters. With 13 segments per character, display is possible of
all required RDS characters (capitals only); with 16 segments per character, umlauts and the accent
can be displayed as well.
Both displays operate in 1:3 multiplex mode.
Digit 1
2
STEREO
3
AST
4
AF
5
TA
6
TP
Umlaut display only
N
O
P
8 Characters
A
F
E
H
I
J
G
K
M
L
B
Decimal Point
7 Segment Display
7
Total segments
9
PTY
ME/CR
Standard Umlaut
104 128
1
1
7
8
7
8
120
144
8 Single Segments
C
8
A
F
B
G
E
C
D
D
Figure 10 Liquid Crystal Display (LCD) layout
Philips Semiconductors Application Note
AN96007