PRODUCT SPECIFICATION TCM165

Version: 1.0 

Date: 4 August 2004 

Tocom: 10777260 

165ps-v1.01.doc 

Author: R.Gehringer 

Location: SDM Villingen 

Tel: +49/7721 85-2291 

PRODUCT 

Internet: 

reinhard.gehringer@thomson.net 

SPECIFICATION 

TCM165 

TCM 165 – 2 

TCM165 - 5

SECTION 



TABLE OF CONTENTS 

Ref.: TCM165 

Section: 1 10777260 

1. SUMMARY__________________________________________________________________ 4 

1. SUMMARY__________________________________________________________________ 4 

1.1 Introduction ____________________________________________________________ 4 

1.2 Characteristics__________________________________________________________ 6 

1.3 Compatibility ___________________________________________________________ 7 

1.4 Overview of related TOCOM numbers _____________________________________ 8 

1.5 Derivatives and naming __________________________________________________ 8 

2. ELECTRICAL HARDWARE ____________________________________________________ 9 

2.1 General ________________________________________________________________ 9 

2.2 Block diagram __________________________________________________________ 9 

2.3 Interface ______________________________________________________________ 10 

2.4. Servo performance _____________________________________________________ 13 

2.5. Audio part ____________________________________________________________ 17 

2.6 ESD __________________________________________________________________ 17 

2.7 Radiation _____________________________________________________________ 17 

3. SOFTWARE_________________________________________________________________ 18 

3.1 Features ______________________________________________________________ 18 

3.2 Communication ________________________________________________________ 19 

3.3 Flowchart for running a simple player _____________________________________ 22 

4. ENVIRONMENTAL CONSIDERATIONS ________________________________________ 25 

4.1 Temperature range _____________________________________________________ 25 

5. MECHANICAL DESCRIPTION ________________________________________________ 26 

5.1 Concept Overview ______________________________________________________ 26 

5.2 Dimensions and drawings________________________________________________ 26 

5.3 Suspension ____________________________________________________________ 29 

5.4 Disc Fixation __________________________________________________________ 30 

6. Main supplied parts ___________________________________________________________ 32 

7. APPLICATION ______________________________________________________________ 33 

7.1 General hints __________________________________________________________ 33 

7.2 Digital / OPTICAL out __________________________________________________ 34 

7.3 Handling and Safety Information _________________________________________ 34 

165ps-v1.01.doc 2 of 35



0.1 Product Spec Revision Follow up 


Section: 1 10777260 

Rev. Date Changes to previous Revision 

0. 0 Aug 2003 1 st version 

0. 1 Aug 12. 2003 some wordings changed 

0. 3 Aug 15. 2003 WAV files 

0. 4 Sept 04. 2003 more details on bit rates and file types 

0. 5 Jan 07. 2004 some cosmetic changes 

0. 6 Feb. 2004 naming of derivatives 

0. 7 April 20. 2004 note:cannot play disc written with packet writing 

mention additional decoder possible 

some phased out laserdiodes removed 

1. 0 July 2004 UDF data formats 

1.01 August 2004 removed ‘preliminary’ 

( ECN 9A5500 ) 

Important 

This document contains confidential information subject to legal protection in all countries. 

In the constant desire to improve its products, THOMSON reserves the right without notice to modify the 

specifications of its products. 

The information contained in this document, including photos and drawings, is non-binding. 

165ps-v1.01.doc 3 of 35

1. SUMMARY 

1.1 INTRODUCTION 




Section: 1 10777260 

The TCM 165 MODULE is a complete functional CD unit, 

except user interface. 

The TCM 165 MODULE is a combination of a Thomson mechadeck and a PCB, 

which contains the necessary electronics based on Thomson CD servo IC TCI5. It 

can playback CDDA as well as MP3 discs. MP3pro is available in a derivative 

version. Other decoders can be implemented on this platform. 

The TCM 165 MODULE is designed for general use in core audio sets ( portable 

with handle and home audio systems ) 

TCM165-2 This is the basic MP3 decoding module fitting for most applications. 

Versions with different disc clamping 

TCM165-2RL is fitting for mechanical environments requiring a lower disc centering 

cone. Major application is for drawer and carousel. 

TCM165-2RM is having a integrated clamper with ball clamping. This type does not 

require a magnetic clamper. It’s only fitting for topload applications. 

Versions with different suspension 

TCM165-xSK and TCM165-xSL is fitting for the new standard with bigger 

suspensions holes. 

The TCM 165 module is designed for CD, CD-R and CD-RW playback. 

All the various versions are based on the same hardware platform. This is true for 

the electronics as well as for the optical pickup. 

The TCM 165 MODULE is not applicable in discman-like sets! 

165ps-v1.01.doc 4 of 35




Section: 1 10777260 

Together with an appropriate keyboard following features are available for any 

version of the module: 

single and multi disk player 

play/pause mode 

skip/search forward / back 

jump to next/previous folder 

mix ( shuffle ) 

intro 

repeat 

programm mode 

syncro start CD to tape 

remote ctrl 

track/disc running and remain time display ( for CDDA only ) 

A-B intervall play 

CD / CD-R /CDRW playback 

Multisession CD-ROM playback capability 

MP3 / MP3 pro playback; other decoders can be implemented by 3 rd party 

Uncompressed Wave files 

Compressed audio decoding features (care must be taken on the license fees) 

MP3 ( optional MP3pro ) files can be played 

Bit rates: 32 to 448 kbps at 32, 44.1, 48 ksamples/s 

Navigate on discs with up to 570 entries, max length of 64 characters each 

Navigate on discs with up to 16 directory levels ( root + 15 subd. Levels ) 

Support OSTA multi audio format 

Support playlists ( .M3U ); some limitations may apply to this 

Extract ID3 tag V 1.0, V2.0, V2.2 information ( Artist, Album, Title, Genre, 

Year ) 

Multi session discs, but need minimum 1 finalised session 

File format either ISO9660 or UDF2.01, being backward compatible with the 

previous versions ( 1.02, 1.50 and 2.00 ) 

Note: TCM165 does not support CD-RW media created using Roxio Direct CD, 

or any other CD burner SW using Fixed Packet Writing. 

165ps-v1.01.doc 5 of 35

1.2 CHARACTERISTICS 




Section: 1 10777260 

An audio set using the TCM 165 MODULE is based on a two µC system. One 

µC (CD servo functions) is part of the TCI5, which is located on the TCM 165 

PCB ( part of the module ) and the second one (keyboard / master uC ) handles 

the user interface of the CD-part and other functions like digital tuning or logic 

cassette deck control. Also the control of a CD slider or/and a CD carousel will 

be handled by the master µC,which is normally located on the key display board 

(KDB). The type of display ( LED , LCD , VFD ) is depending on the used 

keyboard uC. Generally the CD module can fit for any of those types. 

The master uC is not part of the module. 

Please see below a typical system configuration 

CD mechanical tray 

1D drawer 

n-disc changer 

topload 

TCM165 

digital CD one CHIP 

TCI5 

motor/actuator 

driver 

Thomson-mechadeck 

TCP 11 x 

flash 

RAM 

/RESET 

+5Vout 

SDATA 

GND 

SCLK 

Vdd 

AUDIO L 

AUDIO GND 

AUDIO R 

BC01 

source select 

power 

supply 

key/display 

Amplifier 

Tuner 

165ps-v1.01.doc 6 of 35 

Tape 

display 

driver 

µC

1.3 COMPATIBILITY 




Section: 1 10777260 

1.3.1 mechanical 

The mechanical interface of the TCM 165 MODULE is compatible to the 

existing Sony KSM 210 ’standard’ mounting. 

That means the 4 fixation positions, the disc platter level and the shape of the 

disc platter has been designed in the same respects. 

The TCM 165 MODULE will fit into the existing mechanical environments like: 

single disk and multi disk players 

In addition it is available for compatible fixation to the newer standard having 

bigger holes for suspension ( KSM213 like ). 

For mechanical details see section 5 of this document . 

1.3.2 electrical 

The CD module TCM165 is electrically upward compatible to a certain extent to 

previous Thomson CD module generations as TCM135 and earlier. This 

compatibility is limited to the way the module is connected.As it can play 

compressed audio files as well as CDDA, it need a more sophisticated 

keyboard sw compared to previous Thomson CD modules. 

1.3.3 Compatibility to earlier CD modules 

The CD module TCM165 is not compatible to non MP3 types Thomson CD 

modules. The low level communication is remained same as for the standard ( 

CDDA ) CD modules. However in order to recall the MP3 functionality new 

(extended ) commands have been implemented. Some of the commands of the 

CDDA modules are still available. 

For more details, please see the bus specification ( tocom 10851980 ). 

165ps-v1.01.doc 7 of 35




1.4 OVERVIEW OF RELATED TOCOM NUMBERS 

TCM 165 -2 10750280 

TCM 165 –2A 10890480 

TCM 165 –2B 10890490 

TCM 165 –2C 10890510 

TCM 165-5RM t.b.d. 

TCM 165-5SM t.b.d 

Mechanical Specifications f. Customers 1046734x 

Bus for CD extended servo version 3.0 and later 1085198x 

Other derivatives can be created upon request. 

Section: 1 10777260 

1.5 DERIVATIVES AND NAMING 

There are several derivatives of TCM165 available. A special suffix on the name 

is describing the version. 

TCM 165 -2 R K example for the basic module 

-2 standard configuration 

-5 high servo gain ( for less sensitivity to shock) 

R standard fixation of the module ( small holes ) 

S fixation with bigger holes 

K standard disc platter 

L low profile disc platter 

M ball clamper 

-- CDDA, WAV, MP3 file playback 

A CDDA, WAV, MP3,MP3pro, file playback 

B CDDA, WAV, MP3,MP3pro, t.b.d. 

C CDDA, WAV, MP3, t.b.d. 

TCM165 -2 / -5 RK is representing the standard mechanical concept. Therefore the 

naming of those modules has been simplified to TCM 165-2 ( TCM165-5 ). 

This version is able to playback CDDA discs, WAV- and MP3- files. For versions 

being able to playback MP3pro and other decoders the letters A,B,C indicate the 

added functionality. 

165ps-v1.01.doc 8 of 35



2. ELECTRICAL HARDWARE 


Section: 3 10777260 

2.1 GENERAL 

This specification is written for the TCM 165 MODULE only. The specification of 

a complete set using TCM 165 MODULE might be different, because it depends 

on additional parameters. 

TCM165-2 and TCM165-5 are the basic versions with one 9 pin connector BC01. 

The –2 means normal servo gain. The –5 means higher servo gains with some 

advantage in terms of sensitivity to external shocks, but some drawback in terms 

of playability on error discs. 

2.2 BLOCK DIAGRAM 

2.2.1 Figure 1 

Thomson-mechadeck laser drive 

MKP 11 x digital CD one CHIP 

TCI5 

diodes A,B,C,D,E,F 

flash 

IC02 

track/focus actuator 

sledge/disc 

motor 

RAM 

IC03 

motor/actuator 

driver 

IM01 

2.2.2 Semiconductor functions 

In the TCM 165 MODULE a THOMSON CD controller IC ( TCI5 ) is implemented 

for servo control and for control of compressed audio. This chip has built-in all 

necessary logic to control all the CD functions and to communicate to the 

keyboard uC. In addition the audio D/A converters are built in this chip. 

IC01 TCI5 CD servo/decoder IC ( single chip ) 

IC02 flash memory 

IC03 SDRAM 

IM01 motor driver IC 

IN01 audio output buffer 

165ps-v1.01.doc 9 of 35 

IC01 

+U/2 

+5V 

+3.3V 

+1.8V 

IN01 

/RESET 

+5V out 

SCLK 

GND 

SDATA 

Vdd 

AUDIO L 

AUDIO GND 

AUDIO R

2.3 INTERFACE 

2.3.1 General 




Section: 3 10777260 

The electrical interface to a set by using the TCM 165 MODULE is the 9 line 

2mm pitch connector BC01. 

The cable connected to the TCM 165 MODULE has to be flexible, because it 

will influence the suspension of the CD Module. Shielded cables are not 

required for functional reasons. In any case the length of the cable should be 

as short as possible. 

The BC01 connection contains the power input, a +5V output, the 2 line serial 

µC interface, a reset input and the audio output. 

2.3.2 Interface connection to the set 

9pin connector BC01; 2mm pitch ( for compatible 2 line communication) 

Pin# function 

1 - reset input ; to be applied from keyboard 

2 + 5V output for KDB 

3 SCLK ; clock signal of two line KDB interface 

4 GND input from power supply 

5 SDATA ; data signal of two line KDB interface 

6 Power supply input 

7 Audio output right channel 

8 AGND Audio output 

9 Audio output left channel 

!!! important !!! 

The Audio GND pin 8 is not connected to GND input pin 4 . This connection has 

to be done within the set for better S/N ratio. 

165ps-v1.01.doc 10 of 35

2.3.3 Power supply 

2.3.3.1 General 




Section: 3 10777260 

The TCM 165 MODULE is designed to be used with an unregulated source 

like batteries or simple AC/DC converters. This unregulated input voltage will 

be regulated down to 5V on the module. 

The regulated 5V are available on the connector for driving e.g. a KDB. 

Therefore there is no need to have an extra voltage regulator for the keyboard 

circuit ( in case the keyboard does not consume too much current ). 

2.3.3.2 Power supply Input 

Input voltage nominal: 8 V DC 

Input voltage range: 6.5V to 12V DC 

For stabilised power supplies the max. supply voltage must be limited to 

10V in order to avoid overheating of the mechadeck and disc slipping 

during track jumps ! 

Max. input voltage in Stdby mode: 15 V 

Max. ripple of Input voltage.: 1 Vpp, but must not fall short of min. input 

voltage ! 

Ramp up time for proper reset: 2ms ( from 0 V to min. input voltage) 

nominal max 

Input current in play mode: 0.5A 0.7 A t.b.c. 

Input current in jump mode 0.75 A 1.0 A t.b.c. 

All values without keyboard consumption 

2.3.3.3 Output for keyboard supply 

Output Voltage: +5V, ±5% 

Max output current: 50 mA , when the CD part is running 

Max output current: 100 mA , in CD stop mode ( standby ) 

165ps-v1.01.doc 11 of 35




Section: 3 10777260 

2.3.4 Servo µC 

The uC is embedded in the TCI5 servo controller which is part of the module. It 

is controlled by the keyboard uC by serial communication interface. It is a 2 line 

interface and it is low level compatible to all the previous Thomson CD module 

generations ( TCM110. TCM115, TCM116, TCM120, TCM121, TCM125, 

TCM130) . In order to control compressed audio discs the command set of this 

communication has been changed/extended. 

2.3.4.1 2 line serial interface 

The used 2 line serial interface is a syncronuous 2 line interface. It is driven in 

halfduplex mode. It is called ‘ Extended Servo Bus’ . 

For the specification of the CD BUS please refer to chapter 3 ( software 

description ) and to a separately available specification. 

SCLK is the clock output of the servocontroller for synchronisation of the data. 

SCLK is always output from the CD module that means the servocontroller is the 

busmaster. 

For proper working SCLK must be pulled up to 5V by an external resistor 

in the range of 10K: to 47K: . 

SDATA is the bi-directional data line, which is internally pulled up to 5V by a 

10kΩ resistor. It should be connected to an I/O of the master uC having open 

collector characteristics for output. This line must be in high state ( = 3-state ) 

during and till 10ms after reset. 

Both signals have open drain characteristics for output. 

Signal levels: 

SCLK and SDATA output: 

I load = 0.1 mA I load = 1 mA 

low: ≤ 0.5 V ≤ 1.4 V 

high: n.a. n.a. 

SDATA input: 

low: - 0.3 V ....... 1.0 V 

high: 3.5 V ....... 5.1 V 

2.3.4.2 Reset 

In the TCM 165 Module NO internal reset circuit is implemented, the - reset 

signal must be generated by the KDB ! 

Low active, a pull up of 22kΩ to +5V is implemented in the TCM 165, an open 

collector drive of this pin is mandatory ! 

Duration of low phase ( T2 ) : min 10µs , but not before 5V is stable 

The maximum duration of the reset low phase is not specified and therefore it is 

not limited. 

165ps-v1.01.doc 12 of 35



2.4. SERVO PERFORMANCE 


Section: 3 10777260 

2.4.1 General 

The digital automatic alignment servo system implemented in the TCM 165 

MODULE, guarantees the good performance for the entire lifetime of the 

module. 

2.4.2 CDDA discs 

2.4.2.1 Trackability by using Philips test disc SBC 444A 

The error rate C1F1 does not exceed 150 E/s ; no audible disturbances: 

Black dots: 800 µm typical 600 µm min. 

Interruptions: 900 µm typical 700 µm min. 

Fingerprint: Track No. 19 

2.4.2.2 CD-RW Trackability by using A-BEX test disc 025W 

The error rate C1F1 does not exceed 150 E/s ; no audible disturbances: 

Black dots: 700 µm typical 600 µm min. 

Fingerprint: 75 µm typical 65 µm min. 

2.4.2.3 Behaviour on Test discs with eccentricity ; no audible disturbances 

if playing a CD with eccentricity of 140 µm min. ; Disc used : ABEX TCD 712 

2.4.2.4 Vertical deviation ; no audible disturbances ; disc used ABEX TCD 731 

The error rate C1F1 does not exceed 200 E/s: 

min 780µm typical 1000 µm. 

2.4.2.5 Access time 

The access time is depending on the input voltage, the impedance of the 

supply source and the disc. Therefore only typical values at nominal input 

voltage and with non defective discs are given! 

Short access time (track1 to track2): 1.1s typ. t.b.c. 

Long access time (first track / last track): 3.2s typ. t.b.c. 

165ps-v1.01.doc 13 of 35

2.4.3 File mode ( CD-ROM ) 




Section: 3 10777260 

- files with extension MP3 are assumed to be MPEPG compressed audio file 

types; files with extension WAV are assumed to be non-compressed WAVe 

files. These 23 types are recognised and counted upon reading the filesystem 

of the disc. Files with different extension are ignored. 

In case a file is not the type as indicated by the extension, an error 

message will be returned to the master. 

- files types can be played in any mixed sequence. The TCI5 IC automatically 

selects the corresponding decoder. In case the decoder has to be changed 

in between 2 succeeding files, there may be some increase of access time. 

This additional time is needed for initialisation of the decoder. 

- Decodes MP3, MP3pro 

MPEG1,MPEG2 Layer3 bit stream decoder 

- Plays uncompressed WAV files 

- Max no of entries which can be handled: 570 x 64 characters 

Filenames max 64 characters, Directory names max 32 characters 

- Max 16 nested directory levels ( root + 15 subdirectory levels ) 

- Support OSTA multi audio format 

- Support playlists ( .M3U ); due to non standard format some limitations may 

aplly for this. 

- Extract ID3 tags V1.0, V2.0, V2.2 

ARTIST, ALBUM, TITLE, GENRE, YEAR 

- Filenames up to 64 characters length 

Directory names up to 32 characters length; The max count of characters 

can be reduced by a setting, in order to increase the max no of files which 

can be read. Total storage capacity for entries = 570 x 64 characters ( 

combined filename,directoryname ) 

- Can read multisession CD-ROMs 

- Note: TCM165 does not support CD-RW media created using Roxio Direct 

CD, or any other CD burner SW using Fixed Packet Writing. 

165ps-v1.01.doc 14 of 35



2.4.3.1 Bitrates of compressed audio files 

Bitrate 

( kbps ) 

MPEG1 

Layer 1 

MPEG1 

Layer 2 

MPEG1 

Layer 3 

MPEG2 

Layer 1 

MPEG2 

Layer 2 


Section: 3 10777260 

MPEG2 

Layer 3 

VBR X X X X X X 

8 X X 

16 X X 

20 

22 

24 X X 

32 X X X X X X 

36 

40 X X X 

44 

48 X X X X X 

56 X X X X X 


80 X X X X X 


112 X X X X X 

128 X X X X X X 

144 X X X 

160 X X X X X X 

176 X 

192 X X X X 

224 X X X X 

256 X X X X 

288 X 

320 X X X 

352 X 

384 X X 

416 X 

448 X 

165ps-v1.01.doc 15 of 35




Section: 3 10777260 

2.4.3.2 WAVe file playback 

Uncompressed WAVe files according to below mentioned specs can be 

played. 

Sampling 8 bit mono 8 bit stereo 16bit mono 16 bit stereo 

Frequ (k) 

16 X X X X 

22.05 X X X X 

24 X X X X 

32 X X X X 

44.1 X X X n.a. 

48 X X X n.a. 

2.4.3.3 Access time 

For CD-ROMs containing compressed audio the access times may be slightly 

longer compared to CDDA. The access time is mostly pending on the 

directory structure and the way the files are distributed on the discs. 

In case the file type of the succeeding file is different, the access time can be 

slightly increased by initialising the requested decoder. 

165ps-v1.01.doc 16 of 35

2.5. AUDIO PART 




Section: 3 10777260 

2.5.1 General 

The audio signal is generated via the 8 x oversampling filter and D/A converter 

implemented in the TCI5 IC. 

2.5.2 Audio performance 

All values measured at nominal input voltage: 8V 

Test disc: THOMSON 

Reference level 1kHz / 0 dB on track 1 of the test disc. 

Load impedance 22 kΩ ±2% 

Parameter Unit nominal limit 

Output voltage Veff 0.5 0.5±0.06 t.b.c. 

Frequency response (20 Hz / 20 kHz) dB +0.3 -1.5 +1 –2.5 t.b.c. 

Signal to noise ratio ( unweighted ) dB 85 82 t.b.c. 

Signal to noise ratio ( weighted A ) dB 90 86 t.b.c. 

Dynamic range dB 80 76 t.b.c. 

THD+N 1 kHz 0dB (LPF 30kHz/18dB) % 0.025 0.05 t.b.c. 

THD+N 10 kHz 0dB (LPF 30kHz/18dB) % 0. 2 0.3 t.b.c. 

Channel separation dB 83 78 t.b.c. 

Level non linearity at - 60dB dB ±0.5 ±1.5 t.b.c. 

Channel unbalance dB 0.1 0.5 t.b.c. 

De-Emphasis error dB ±1 ±2 t.b.c. 

2.6 ESD 

The ESD behaviour of the TCM 165 MODULE depends on the application in a 

set. Precautions are taken to guarantee correct working under all standard 

conditions happening in consumer environment. 

2.7 RADIATION 

All precautions to minimise the radiation within an acceptable expense are 

integrated into the CD module. Due to the very small size of the module the 

radiation generated by the module is on a low level. Normally it should be 

possible to drive the module without shielding. In case it is used within a HiFi 

set, It is recommended to disconnect the TCM165 from power in case the 

CD/MP3 source is not activated. This avoids the radiation generated by the 

TCM165 to disturb tuner reception. 

The level of radiation in play mode is depending from the set where it is 

implemented! 

165ps-v1.01.doc 17 of 35

3. SOFTWARE 

3.1 FEATURES 




Section: 3 10777260 

The TCM 165 module has been designed for universal use in any core audio set ( 

audio systems, portable ) with CD/MP3 function. 

It is not designed to be used in discman-like application. 

This section describes the software which is implemented in TCM 165 module. 

3.1.1 Needs 

An additional uC ( keyboard/master uC ) which handles the keyboard/userinterface 

functions. 

3.1.2 Supports 

Following functions can be supported with an appropriate keyboard/master uC: 

-play ; play/pause 

-skip forward/back 

-search forward/back in 2 fixed speeds ( around 10x and 40x ) 

-track/time/index display 

-track/disc remain time display ( for CDDA only ) 

-A/B interval play 

-synchro start ( for recording ) 

-can be used in multiple disc player 

-shuffle play 

-intro play 

-pause functions 

-store TOC info for 99 tracks (CDDA) 

-CD/R playback 

-CD/RW playback 

- multisession CD-ROM playback capability ( finalised sessions only) 

-support compressed audio formats MP3, MP3pro. Other decoders can be 

implemted by sw change, but may be limited for licensing reasons. 

3.1.3 Not supported functions / applications 

-variable speed playback , double speed playback 

-discman application 

- TCM165 does not support CD-RW media created using Roxio Direct CD, or 

any other CD burner SW using Fixed Packet Writing. 

165ps-v1.01.doc 18 of 35

3.2 COMMUNICATION 




Section: 3 10777260 

All functions of the module can be controlled by using a 2 line bi-directional bus 

connection between the servo µC and the key/display controller. This interface 

is setable -in terms of speed- by the key/display µC(master). 

A documentation describing the interface including some functional 

description of the servo is available. It is entitled EXTENDED BUS FOR 

COMPACT DISC SERVO ( version 3.0 or higher ) . That documentation has to 

be seen as part of this spec. 

3.2.1 Requirements for keyboard µC 

It is recommended to use a master µC which is fast enough to handle the 

communication via an interrupt line ( falling edge trigger ). 

In case the prefered uC does not have this ability , it may be configured to use 

a 8 bit serial shift register ( must be built in on the keyboard uC ). For start 

sequence and for acknowledge handling in checksum mode the data & clock 

lines must be treated as standard ports. It must be able to switch the data line 

to input as well as to output mode, whereas the clock is always an input. 

The data line has to be fed to a standard I/O port which can be switched to 

input and output by software. 

3.2..2 Checksum 

A checksum on communication is implemented. This makes the master 

servo communication more reliable in electromagnetically 'polluted' 

environments. 

165ps-v1.01.doc 19 of 35



3.2..3 Module specific commands 


Section: 3 10777260 

Some commands/messages mentioned in the BUS DESCRIPTION are module 

specific. Therefore this commands/messages are described here. The major use 

for these commands is for service/development purposes. 

3.2..3.1 SYST command 

This function is normally not needed. However it can be useful for implementing 

special functionality to support production and testing. Must be applied carefully 

in order to avoid damage to the CD module. These functions have been done 

for evaluation and may not work under all conditions as expected. 

CD-BUS Function Description 

Command 

/No 

71 00 STOP stops/clears all test-functions and executes standard 

STOP procedure 

71 01 LASER ON switches laser diode on with nominal current 

71 02 LASER OFF switches laser diode off 

72 03 SERVICE MODE enable/disable service mode 

switches subcode Q timeout,play ctrl,mute ctrl 

bit 0: subcode Q ctrl on ( 1 ) / off ( 0 ) 

bit 1: play ctrl on ( 1 ) / off ( 0 ) 

bit 2: mute ctrl on ( 1 ) / off ( 0 ) 

71 05 MOVE SLEDGE moves sledge to the outer limitation of the mechanism 

OUTWARDS HALT mode is automatically disabled (command: 71 61) 

timeout after 3.5s , then motor stops 

71 06 MOVE SLEDGE moves sledge to the inner limitation of the mechanism 

INWARDS HALT mode is automatically disabled (command: 71 61) 

timeout after 3.5s , then motor stops 

71 07 STOP SLEDGE stops sledge movement 

71 08 CLV KICK MODE disc motor rotates in forward direction 

HALT mode is automatically disabled (command: 71 61) 

71 09 CLV A MODE sets CLV controller in automatic control mode 

HALT mode is automatically disabled (command: 71 61) 

71 0A CLV BRAKE MODE brakes disc motor rotation 

only available if HALT mode disabled (command: 71 61) 

next available CLV cmd is CLV STOP MODE 

71 0B CLV STOP MODE stops disc motor 

71 0C FOCUS SEARCH executes standard focus search procedure; 

closes focus loop if possible; 

no limitation of focus search trials; 

SERVICE MODE ON will be activated automatically 

71 0D FOCUS OFF breaks all focus activities; opens focus loop 

165ps-v1.01.doc 20 of 35




Section: 3 10777260 

71 0E TRACKING ON & closes tracking loop; coarse tracking remains open; 

COARSE TRACKING OFF SERVICE MODE ON will be activated automatically 

71 0F TRACKING ON & closes tracking and coarse tracking loop; 

COARSE TRACKING ON SERVICE MODE ON will be activated automatically 

71 10 TRACKING OFF & opens tracking and coarse tracking loop; 

COARSE TRACKING OFF 

71 11 TRACKING OFFSET ON applies positive and negative voltage to tracking actuator 

(ramping); max. offset voltage is in a suitable range; ramping frequency = 0.5 Hz 

Next cmd must be either 71 00 or 71 12 

71 12 TRACKING OFFSET OFF no offset will be applied to the tracking actuator 

73 13 JUMP N TRACKS FORWARD N is selected through = MSB, = LSB 

 

73 14 JUMP N TRACKS BACKWARD N is selected through = MSB, = LSB 

 

3.2.3.5 RESETCD command cmd 

The RESET CD command switches the module immediately off ( soft reset ). 

Play mode will be suspended without disc brake sequence. The TOC will be 

reset. All parameters will be set to default ( bit/byte delay ). 

3.2.3.6 Version commands/messages XVERS cmd , XSVERS message 

The XVERS command can be used to request the actual version of the sw/hw 

on the TCM165 module. There are several submodules of sw inside the IC. The 

information on each of these submosules can be requested separately by 

selecting the type: 

Cmd general format of this command. 

Type 1 =servo , type3=decoder 

Cmd this requests the info on the servo part of the IC 

Cmd not available on TCM165 

Cmd this requests the info on the decoding submodule (AAPS). 

The TCM165 will answer with message XSVERS. The XSVERS message 

contains information concerning the requested submodule and about the sw 

inside . 

Answer: message < 74 , vers , type , cod ID1 , cod ID2 > 

165ps-v1.01.doc 21 of 35




Section: 3 10777260 

Examples: 

Request the servo sw revision: cmd < 79 01 > 

Answer: 

indicates TCI5 

indicates this is a servo sw version ( corresponding to XSVERS cmd ) 

gives a sw running no. 

Request the patch code identifier: cmd 

There is no patch possible on TCM165, therefore ‘command not available’ 

Request the version of the decoding backend ( AAPS ) cmd 

Answer: 

indicates TCI5 

indicates this is a AAPS sw version ( corresponding to XSVERS cmd ) 

gives a sw running no. 

3.3 FLOWCHART FOR RUNNING A SIMPLE PLAYER 

Below explanation is referring to communication protocol described in 

EXTENDED BUS FOR COMPACT DISC SERVO ( version 3.0 or higher ) . All 

algorithms are recommendations only. There are a lot of incompatible discs 

which should be played. Therefore some items of the algorithms may need to 

be finetuned and tested. Also it only describes the framework of what has to be 

done. Several items, e.g. time-outs , have to be treated in parallel. 

3.3.1 Read the table of contents (TOC) of a disc 

Following sequence is recommended for reading TOC and detect whether there 

is an audio CD ( CDDA ) or a CD-ROM inserted. 

Send RLIT1 to read CDDA cmd < 53 00 00 00 > 

Wait till LITI1 

Then analyse LITI1 message 

IF CDDA session bit cleared ( D1 of session byte ? ) goto CD-ROM 

ELSE 

IF CD-ROM track in session 1 cleared ( D0 of session byte ? ) goto CDDA 

ELSE 

IF MIN-tno = MAX-tno = 1 ? goto CD-ROM 

ELSE 

CDDA: treat as normal CDDA disc 

… End of TOC read Æ goto CDDA routine…. 

CD-ROM: 

ISSUE RLIT1 to read file system, cmd: 

Wait til LITI2 

Filenno are known 

… End of TOC read Æ goto CD-ROM/MP3 routine…. 

165ps-v1.01.doc 22 of 35




3.3.2 start to play a MP3 disc after TOC/file system is read 

Section: 3 10777260 

PLAY-TITLE: 

Send PLTRK with requested title no, cmd < 2A 01 00 > 

SUBQ1-display: 

Wait till SUBQ1 

IF (title no = FF FF ) goto TITLE-END 

ELSE Display SUBQ1 information ( time,title no ) according to the spec 

Goto SUBQ1-display 

TITLE-END: 

Create next title to be played 

IF more titles to play, goto PLAY-TITLE 

ELSE Issue STOP command to go to stop mode 

3.3.3 start to play a MP3 disc after TOC/file system is read 

and display the file name 

PLAY-TITLE: 

GSTRUCT2 with requested title no, cmd < E5 01 00 01 00 20d> 

; this gets the name of title# 1 , only 1 file name is trnasfered, only 20 

characters are transferred. 

Wait till STRUCT2 message 

Receive and write to name buffer until 00,01 bytes are received, meaning 

end of text transmission. 

Show title name on display. 

Send PLTRK with requested title no, cmd < 2A 01 00 > 

SUBQ1-display: 

Wait till SUBQ1 

IF (title no = FF FF ) goto TITLE-END 

ELSE Display SUBQ1 information ( time,title no ) according to the spec 

Goto SUBQ!-display 

TITLE-END: 

Create next title to be played 

IF more titles to play, goto PLAY-TITLE 

ELSE issue STOP command to go to stop mode 

3.3.4 stop playing 

Attention: preliminary info, due to STATUS message is subject to change 

STOP: 

STOP1 with, cmd < 59 00 > 

; this command initiates the stop procedure. 

STOP-in-progress: 

Wait till SSTA1 message in AAPSstat1 bit 6= 1 

AND in SSTA message in servo stat bit 6 = 1 

3.3.5 Other hints 

The feature ‘title remain display’ is not do-able in MP3 mode 

165ps-v1.01.doc 23 of 35

3.3.6 File sequence 




Section: 3 10777260 

The files can be accessed in the sequences indicated below. 

It will start playing with the first playable file in the root directory followed by 

the other titles in the root directory. Then it will scan the 1 st found subdirectory 

and play the titles of that subdirectory. In case there are again subdirectories it 

will scan the 1 st subdirectory and play. 

Below scetch can explain more clearly how it works: 

The file no. indicates the sequence how the files are played 

root 

file 01 

file 02 

file 03 

file 04 

file 05 

file 06 

file 07 

file 08 

dir 0 1 

file 09 

file 10 

dir 0 2 file 13 

dir 1 2 

file 14 

file 15 

dir 1 1 

dir 2 1 

file 11 

file 16 

dir 2 2 

file 17 

file 18 

dir 2 3 

file 19 

file 12 

file 20 

file 21 

file 22 

file 23 

file 26 

165ps-v1.01.doc 24 of 35 

dir 31 

file 24 

dir 3 2 

file 25 

file 27




4. ENVIRONMENTAL CONSIDERATIONS 

4.1 TEMPERATURE RANGE 

Section: 4 10777260 

The operating temperature range of a set using the TCM 165 MODULE 

depends on the implementation of the set, e.g. the air flow and the location of 

other heat dissipating parts in relation to the module. 

The value which is given here in the specs is related to the module itself in a 

heat chamber! 

The measurement is done with the specified maximum supply input voltage! 

Ambient operating temperature range of the module: -5°C to + 55°C 

Note: After a big temperature change in play mode some parameters may need new 

alignment in order to keep the performance especially in terms of playability on disc 

defects. This can be achieved by stop/play sequence. 

165ps-v1.01.doc 25 of 35

PRODUCT SPECIFICATION 

5. MECHANICAL DESCRIPTION 

5.1 CONCEPT OVERVIEW 


Section: 5 10777260 

The mechanical interface of the TCM 165 MODULE is compatible to the existing 

’standard’ mounting in audio products. That means the four fixation positions, the 

disc platter level and the shape of the disc platter have been designed in this 

respect. Therefore the TCM 165 MODULE will fit into existing mechanical 

environments . As an alternative there are versions available fitting to the newer 

standard for rubber fixation. The holes are located on the same positions as the 

old standard , but are having bigger diameters for suspension . 

This version is indicated by a ‘S’in the name (e.g. TCM165-2SM). 

There are three versions available having different disc centering cones. The 

standard type is TCM165-2 . This type is fitting for topload applications and 

within Thomson drawers and carousels. This is the most popular configuration . 

The TCM165-2RL is having a lower disc centering cone. This is required by 

some mechanical environments ( drawers and carousels ). 

The TCM165 – 5RM is having a ball clamper integrated. This type is fitting for 

topload application without magnetic clamper. 

5.1.1 A document called Mechanical Specifications for Customers is available 

in TOCOM# 1046734x. 

5.2 DIMENSIONS AND DRAWINGS 

5.2.1 Size 

Overall size: ca. 100 x 80 mm (determined by the mechadeck size) 

Height: ca. 44.5 mm (from disc level to end of component leads) 

5.2.2 Weight 

Weight of module without disc and disc clamper: ca. 175 gramm. 

165ps-v1.01.doc 26 of 35


5.2.3 TCM 165-2 MODULE Assembly Drawing 

5.2.3.1 TCM 165 MODULE mechanical standard configuration 


5.2.3.2 TCM 165 -2 SM mechanical configuration ( big fixation holes ) 

Section: 5 10777260 

165ps-v1.01.doc 27 of 35



Section: 5 10777260 

5.2.4 TCM 165-2RL Disc centering cone 

The height of the disc ( above the mainplat/mechadeck ) is the same as for 

TCM165-2. 

The major application for this type will be drawers and carousel having a 

restriction in height by the loader mechanisms. 

5.2.5 TCM 165-2RM Ball clamping platter 

The height of the disc ( above the mainplat/mechadeck ) is the same as for 

TCM165-2. 

or 

This gives a good solution in terms of cost efficiency. There is no magnet 

neither the holder for the magnets needed in the final set. Due to the fact there 

is no damping mass pushing on the CD this solution is more sensitive to 

acoustical feedback. This is very critical for sets having loudspeakers built in . 

Therefore it is strongly recommended to evaluate the feasibility of using ball 

calmper at a early development stage. 

This version is not feasible for drawer application 

165ps-v1.01.doc 28 of 35

5.3 SUSPENSION 

5.3.1 General 



Section: 5 10777260 

A clearance of 2mm in all directions around the module is needed in order to 

have the suspension working. 

5.3.2 Suspension for standard disc fixation 

The following suspension parts are recommended in case of small hole fixation: 

Shape of the suspensions: 

The suspensions are specified more detailed under Thomson ( tocom ) # 

20403270 hardness 40 

20403310 hardness 50 ( motor side ) 

5.3.2 Suspension for big hole disc fixation 

The following suspension parts are recommended in case of big hole fixation: 

Shape of the suspensions: 

The suspensions are specified more detailed under Thomson ( tocom ) # 

10581310 hardness 30 

10581320 hardness 40 ( motor side ) 

165ps-v1.01.doc 29 of 35

5.4 DISC FIXATION 



Section: 5 10777260 

For TCM165-2 the disc must be clamped to the fixed platter by a magnetical 

clamper. Similar methodology is requested for TCM165-2RL. The shape of the 

clamper must fit to the disc centering cone. 

For TCM165-5RM and TCM165-5SM there is no magnetical clamper needed. 

5.4.1 Portable application 

For portable application ( or more general for applications having the 

loudspeakers within the set ) some precautions are needed to avoid disc 

skipping through sound pressure and vibration of the CD . 

- recommended chucking plate is bigger than standard e.g. TSC04 (tocom# 

10579190 ) 

- Some walls in between the loudspeakers and the CD module are 

recommended ( to reduce direct sound pressure to the CD module ) 

- Damping the fixation of the loudspeakers versus the set ( to reduce vibration of 

the set ) 

- implement the bigger suspension rubbers ( e.g. TCM165-2SL ) 

5.4.2 Audio systems 

Audio systems configuration means separate loudspeakers outside the set. This 

is usually not critical in terms of vibrations. For this application a small chucking 

plate may be used ( TSC03 tocom# 10595120 ). 

5.4.3 Mounting 

The module has been designed for horizontal mounting. It is feasible to be 

used in vertical mounting as shown in below scetch. 

For suspension reasons it is recommended to use S - version ( big suspension 

holes ) for vertical mounting. 

This side up 

This side down 

165ps-v1.01.doc 30 of 35

5.5 PACKAGING 



Section: 5 10777260 

1 box contains 40 units, packed in anti-static plastic bags, 20 units per tray. 

Dimension: 495x285x225 mm (LxWxH), Weight: 8.1 Kg 

165ps-v1.01.doc 31 of 35


6. MAIN SUPPLIED PARTS 

Part 


Section: 6 10777260 

supplier Part Name 

Laser Diode Rohm Co. Ltd RLD-78 MYR1 

RLD-78 MPA1 

Sony Corporation SLD131UL 

Sanyo DL-3150-106 

Sharp Corporation GH17805B2A 

Feed Motor Mabuchi ( or equivalent ) RF310 TA 

RF310 TH 

Matsushita ( or equivalent ) MDN4BM3EVA 

MDN4BM3EVA1 

Very Good ( or equivalent ) RF310TA-11400D/V 5.9 

Johnson (or equivalent) 96U208PC200SG 

PC200SDG-23411 

Spindle Motor Mabuchi ( or equivalent ) RF310 T 

Matsushita ( or equivalent ) MDN4BM3FVAS 

MDN4BM3FVAS1 

Very Good ( or equivalent ) RF310TL-11400D/V 5.9 

Johnson (or equivalent) 96U209PC200SG 

PC200SDG-23412 

IMPORTANT: Throughout the life time of the product there might be some parts 

added to this list without further notice. 

165ps-v1.01.doc 32 of 35

7. APPLICATION 

7.1 GENERAL HINTS 




Section: 7 10777260 

- As already mentioned within other chapters of this document the audio Gnd 

and the digital Gnd have to be connected on the set level. Generally it is 

sufficient to have it connected via the Gnd of the audio part. 

- The module has been designed for horizontal mounting. It is feasible to be used 

in vertical mounting as shown in below scetch. 

This side up 

This side down 

- In case it’s used in a set having the loudspeakers attached or built in the 

module should have some protecting walls around to avoid acoustical feedback 

to the CD pickup. Care has to be taken on this item especially if using TCM165 

– 2xM ( ball clamper ). For further improvement it is recommended to use S 

version ( e.g. TCM165-2SM ) . Also the version TCM165-5 ( so called high-gain 

) might improve the behaviour towards acoustical feedback. 

- During stop mode ( the CD is not playing ) all oscillation on the module is 

stopped. The servo controller IC is put in halt mode. Through sending any 

command from the master it will wake up. 

In a stereo center this allows to keep the module powered on even when 

listening to the tuner (w/o interference to the tuner ). 

165ps-v1.01.doc 33 of 35



7.2 DIGITAL / OPTICAL OUT 

This feature is not available for the current versions 

7.3 HANDLING AND SAFETY INFORMATION 


Section: 7 10777260 

PLEASE READ THE FOLLOWING INSTRUCTIONS CAREFULLY BEFORE 

HANDLING ANY CD-MODULE ! HANDLE WITH CARE ! 

Handling Instruction 

All Thomson pickups in the modules are precisely assembled and adjusted 

during the manufacturing process in the Thomson plant. 

The TCM 165 will be delivered with a lens cover, please do not remove the cover 

before final assembly! 

Keep the module protected from vibration , humidity and heat. 

Do not disassemble or try to readjust the pickup! 

Never touch the lens, the actuator, laser diode or the photo detector. 

Dirty lenses could be cleaned with well compressed cotton-wool-tip with 50:50 

mixed solvent of isopropyl alcohol. 

Storage Instruction 

For storage and transport leave the Module in the polyfoam case and the closed 

carton Box. Place the box always horizontal as indicated on the carton box. 

Keep the module protected from vibration or impact. 

Do not store the module in high temperature, high humidity or dusty 

environments, other than specified. 

165ps-v1.01.doc 34 of 35

Laser Diode 




Section: 7 10777260 

Never look at the emitted laser light beam through the objective lens. The 

invisible laser beam may damage the human eye. Use an infrared viewer or ITV 

camera to observe the laser beam. 

The pickup is classified as laser class 1 . 

Actuator 

Never touch the actuator of the pick up. 

The performance of the actuator may be effected by magnetic fields or magnetic 

material nearby. 

Avoid dust to enter through the gap of the protector cover. 

Never remove the protector cover. The pickup might be damaged. 

Connection and Mounting 

Handle the module with care during mounting, especially do not touch the area 

of the pickup soldering to the PCB. 

For safety, grounding of the human body is compulsory during assembly. 

165ps-v1.01.doc 35 of 35

PRODUCT SPECIFICATION TCM165

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