MSP3410B

 

Multistandard Sound Processors

 

 

 

Micronas

Micronas



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PRELIMINARY DATA SHEET
MSP 3410 B
Multistandard
Sound Processor
Edition Nov. 20, 1995
6251-366-9PD


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MSP 3410 B
PRELIMINARY DATA SHEET
Contents
Page
Section
4 1.
5 2.
5 2.1.
5 2.2.
5 2.3.
6 3.
6 3.1.
6 3.2.
9 4.
9 4.1.
9 4.1.1.
9 4.1.2.
10 4.1.3.
10 4.1.4.
10 4.1.5.
10 4.1.6.
10 4.1.7.
11 4.1.8.
11 4.1.9.
11 4.1.10.
11 4.2.
11 4.3.
12 4.4.
13 5.
14 5.1.
14 5.2.
14 5.2.1.
14 5.2.2.
14 5.2.3.
14 5.2.4.
14 5.3.
15 6.
15 7.
15 8.
16 9.
16 10.
17 11.
17 11.1.
18 11.2.
18 11.2.1.
19 11.2.2.
20 11.2.3.
Title
Introduction
Features of the MSP 3410 B
Features of the Demodulator and Decoder Sections
Features of the DSP-Section
Features of the Analog Section
Application Fields of the MSP 3410 B
NICAM plus FM-Mono
German 2-Carrier System (DUAL FM System)
Architecture of the MSP 3410 B
Demodulator Block
Analog Sound IF – Input Section
Quadrature Mixers
Lowpass Filtering Block for Mixed Sound IF Signals
CORDIC Block
Differentiate
Lowpass Filter Block for Demodulated Signals
High Deviation FM Mode
MSP-Mute Function in the Dual Carrier FM Mode
DQPSK-Decoder
NICAM-Decoder
Analog Section and SCART Switches
MSP 3410 B Audio Baseband Processing
Dual Carrier FM Stereo/Bilingual Detection
Control Bus Interface
Protocol Description
Proposal for MSP 3410 B I2C Telegrams
Symbols
Write Telegrams
Read Telegrams
Examples
Start Up Sequence
N-Bus Interface
Pay-TV Interface
Audio PLL and Crystal Specifications
S-Bus Interface
I2S Bus Interface
Programming the Demodulator Part
Write Registers: Table and Addresses
Write Registers: Functions and Values
Setting of Parameter AD_CV
Control Register ’MODE_REG’
FIR-Parameter
2
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PRELIMINARY DATA SHEET
MSP 3410 B
Contents, continued
Page
21
22
22
23
24
24
24
24
24
25
25
Section
11.2.4.
11.3.
11.4.
11.5.
11.6.
11.6.1.
11.6.2.
11.6.3.
11.6.4.
11.6.5.
11.6.6.
Title
DCO-Increments
Read Registers: Listing and Addresses
Read Registers: Functions and Values
Sequences to Transmit Parameters and Start of Processing
Software Proposals for Multistandard TV-Sets
Multistandard Including System B/G with NICAM/FM-Mono only
Multistandard Including System I with NICAM/FM-Mono only
Multistandard Including System B/G with NICAM/FM-Mono and German DUAL FM
Satellite Mode
Automatic Search Function for FM-Carrier Detection
Automatic Standard Detection
26 12. Programming the Audio Processing Part
26
12.1.
Summary of the DSP Control Registers
31
12.2.
Exclusions
32
12.3.
Summary of Readable Registers
34 13. Specifications
34
13.1.
Outline Dimensions
35
13.2.
Pin Connections and Descriptions
38
13.3.
Pin Configuration
39
13.4.
Pin Circuits
41
13.5.
Electrical Characteristics
41
13.5.1.
Absolute Maximum Ratings
42
13.5.2.
Recommended Operating Conditions
47
13.5.3.
Characteristics
54 14. Timing Diagrams
54
14.1.
Power-up Sequence
54
14.2.
I2C Bus Timing Diagram
55
14.3.
I2S Bus Timing Diagram
56
14.4.
SBUS Timing Diagram
57 15. Application Circuit
58 16. DMA Application
60 17. I2S Bus in Master/Slave Configuration with Standby Mode
61 18. APPENDIX A: MSP 3410/3400B Technical Code History
63 19. APPENDIX B: Documentation History
63
19.1.
MSP 3400
63
19.2.
MSP 3410 and MSP 3400
63
19.3.
MSP 3410 B and MSP 3400 B
64 20. APPENDIX C: Documentation of known hardware restrictions for TC15
65 21. Index
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MSP 3410 B
PRELIMINARY DATA SHEET
Multistandard Sound Processor
Release Notes:
The hardware description in this document is valid for the MSP 3410 B version F7 and
following versions. The suffix “B” in the name denotes the requirements of the crystal
with modified specifications.
For a brief history survey, please see appendix “MSP 3410 B Technical Code History”.
The present document is version 0.8. Revision bars indicate significant changes to
revision 0.7.
1. Introduction
The MSP 3410 B is a single-chip Multistandard Sound
Processor for applications in analog and digital TV sets,
satellite receivers and video recorders.
The MSP-family, which goes back to the MSP 2400,
demonstrates in an impressive way the progressive de-
velopment towards highly integrated ICs, offering more
and more features and flexibility. The development of
the MSP 2410 included an automatic gain control but re-
duced the amount of external components. The MSP
2410 reached a high level of performance and is the ba-
sis for the new generation.
The MSP 3410 B increases function integration in a
spectacular way. By including the MSP2410 as a library
cell and combining it with AD/DA converters and high
performance digital signal processing, the chip offers a
wide range of features. The complete TV-sound-proces-
sing, starting at the Sound-IF domain, will be performed
by one single IC. The inputs of the IC are analog audio
signals in baseband and at intercarrier position. The
MSP 3410 B covers the sound processing of a wide
range of TV-standards. Some examples are listed in
Table 3–1.
The MSP 3410 B is produced in 1.0 µm CMOS technolo-
gy and is available in 68-pin PLCC and in 64-pin PSDIP
packages.
SBUS I2S
I2C
442
Sound IF 1
Sound IF 2
MONO IN
SCART1 IN
SCART2 IN
SCART3 IN
2
2
2
MSP 3410 B
Fig. 1–1: Main I/O Signals MSP 3410 B
2
LOUDSPEAKER OUT
2
HEADPHONE OUT
2
SCART1 OUT
2
SCART2 OUT
4 ITT Semiconductors


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PRELIMINARY DATA SHEET
MSP 3410 B
2. Features of the MSP 3410 B
2.1. Features of the Demodulator and Decoder
Sections
The MSP 3410 B is designed to simultaneously perform
digital demodulation and decoding of NICAM-coded TV
stereo sound, as well as demodulation of FM-mono TV
sound. Alternatively, two carrier FM systems according
to the German or Korean terrestrial specs or the satellite
specs can be processed with the MSP 3410 B.
Since it is simple and economic to demodulate AM
sound carriers with conventional sound-IF-mixing units,
the AM demodulation feature of the MSP will seldom be
used. However, for FM carrier detection in satellite oper-
ation the AM demodulation offers a powerful feature to
calculate the carrier field strength, which can be used for
automatic search algorithms. So the IC facilitates a first
step towards multistandard capability with its very flex-
ible application and may be used in TV-sets, satellite
tuners and video recorders.
The MSP 3410 B facilitates profitable multistandard ca-
pability, offering the following advantages:
– two selectable analog inputs (TV- and SAT-IF sources)
– Automatic Gain Control (AGC) for analog input: input
range: 0.14 – 3 Vpp
– integrated A/D converter for sound-IF inputs
– all demodulation and filtering is performed on chip and
is individually programmable
– simple realization of both digital NICAM standards
(UK/Scandinavia)
– no external filter hardware is required
– only one crystal clock (18.432 MHz) is necessary
– Pay-TV for NICAM-mode
– FM carrier level calculation for automatic search algo-
rithms and carrier mute function
– high deviation FM-mono mode (max. deviation:
approx. ±360 kHz)
2.2. Features of the DSP-Section
– flexible selection of audio sources to be processed
– digital input and output interfaces via S-Bus for DMA-
via AMU, and via I2S-Bus for external DSP-Proces-
sors featuring Graphic Equalizer, Surround Sound etc.
– performance of all deemphasis systems including
adaptive Wegener Panda 1 without external compo-
nents or controlling
– performance of D2MAC audio together with an
AMU 2481
– digitally performed FM-identification decoding and de-
matrixing
– digital baseband processing: volume, bass, treble,
pseudostereo and basewidth enlargement
– simplified controlling of volume, bass, treble etc.
– increased audio bandwidth for FM-Audio-signals
(20 Hz – 15 kHz , ±1 dB)
2.3. Features of the Analog Section
– three selectable analog pairs of audio baseband in-
puts (=three SCART inputs)
Input level: 2 V RMS;
input impedance: 25 k
– one selectable analog mono input (i.e. AM sound);
Input level: 2 V RMS;
input impedance: 10 k
– two high quality A/D converters; S/N-Ratio: 85 dB
– 20 Hz to 20 kHz Bandwidth for SCART-to-SCART-
Copy facilities
– MAIN (loudspeaker) and AUX (headphones): two
pairs of 4-fold oversampled D/A-converters
Output level per channel: max. 1.4 VRMS
Output resistance: max. 5 k
S/N-Ratio: 85 dB at maximum volume
max. noise voltage in mute mode: 10 µV (BW: 20 Hz
... 16 kHz)
– one pair of four-fold oversampled D/A-converters sup-
plying two selectable pairs of SCART-Outputs. Output
level per channel: max. 2 V RMS, output resistance:
max. 0.5 k, S/N-Ratio: 85 dB
(20 Hz ... 16 kHz)
ITT Semiconductors
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MSP 3410 B
PRELIMINARY DATA SHEET
3. Application Fields of the MSP 3410 B
In the following sections, a brief overview about the two
main TV sound standards, NICAM 728 and German FM-
Stereo, demonstrates the complex requirements of a
multistandard audio IC.
3.1. NICAM plus FM-Mono
According to the British, Scandinavian and Spanish TV-
standards, high quality stereo sound is transmitted digi-
tally. The systems allow two high quality digital sound
channels to be added to the already existing FM chan-
nel. The sound coding follows the format of the so-called
Near Instantaneous Companding System (NICAM 728).
Transmission is performed using Differential Quadra-
ture Phase Shift Keying (DQPSK). Table 3–2 gives
some specifications of the sound coding (NICAM); Table
3–3 offers an overview of the modulation parameters.
In the case of NICAM/FM mode there are three different
audio channels available: NICAM A,NICAM B and FM-
mono. NICAM A and B may belong either to a stereo or
to a dual language transmission. Information about op-
eration mode and about the quality of the NICAM signal
can be read by the CCU via the control bus. In the case
of low quality (high bit error rate) the CCU may decide
to switch to the analog FM-mono sound.
3.2. German 2-Carrier System (DUAL FM System)
Since September 1981, stereo and dual sound pro-
grams have been transmitted in Germany using the
2-carrier system. Sound transmission consists of the al-
ready existing first sound carrier and a second sound
carrier additionally containing an identification signal.
Some more details of this standard are given in Table
3–4.
Table 3–1: European TV standards
TV-System
B/G
B/G
L
I
D,K
M
Satellite
Satellite
Position of Sound
Carrier /MHz
5.5/5.74
5.5/5.85
6.5/5.85
6.0/6.552
6.5
4.5
6.5
7.02/7.2
Sound
Modulation
FM-Stereo
FM-Mono/NICAM
AM-Mono/NICAM
FM-Mono/NICAM
FM-Mono
FM-Mono
FM-Mono
FM-Stereo
Color System
PAL
PAL
SECAM
PAL
SECAM
NTSC
PAL
PAL
Country
Germany
Scandinavia,Spain
France
UK
USSR
USA
Europe (ASTRA)
Europe (ASTRA)
Table 3–2: Summary of NICAM 728 sound coding characteristics
Characteristics
Audio sampling frequency
Number of channels
Initial resolution
Companding characteristics
Coding for compressed samples
Preemphasis
Audio overload level
Values
32 kHz
2
14 bit/sample
near instantaneous, with compression to 10 bits/sample in 32-sam-
ples (1 ms) blocks
2’s complement
CCITT Recommendation J.17 (6.5 dB attenuation at 800 Hz)
+12 dBm0 measured at the unity gain frequency of the preemphasis
network (2 kHz)
6 ITT Semiconductors


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PRELIMINARY DATA SHEET
MSP 3410 B
Table 3–3: Summary of NICAM 728 sound modulation parameters
Specification
Carrier frequency of digital sound
Transmission rate
Type of modulation
Spectrum shaping
Roll-off factor
Carrier frequency of analog sound
component
Power ratio between vision carrier
and analog sound carrier
Power ratio between analog and
modulated digital sound carrier
UK Scandinavia/Spain France
6.552 MHz
5.85 MHz
5.85 MHz
728 kBit/s 1 part/million
Differentially encoded quadrature phase shift keying (DQPSK)
by means of Roll-off filters
1.0 0.4 0.4
6.0 MHz
FM mono
5.5 MHz
FM mono
6.5 MHz AM mono
terrestric cable
10 dB
13 dB
10 dB
16 dB
10 dB
7 dB
17 dB
11 dB
Table 3–4: Key parameters for German 2-carrier sound system
Sound Carriers
Channel FM1
Intercarrier frequencies
5.5 MHz
Vision/sound power difference
13 dB
Sound bandwidth
Pre-emphasis
Frequency deviation
Sound Signal Components
Mono transmission
mono
Stereo transmission
(L+R)/2
Dual sound transmission
language A
Identification of Transmission Mode on Channel 2
Pilot carrier frequency
Type of modulation
Modulation depth
Modulation frequency
Channel FM2
5.7421875 MHz
20 dB
40 Hz to 15 kHz
50 µs
±50 kHz
mono
R
language B
54.6875 kHz
AM
50%
mono: unmodulated
stereo: 117.5 Hz
dual: 274.1 Hz
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MSP 3410 B
PRELIMINARY DATA SHEET
33 34 39 MHz
5 9 MHz
Tuner
SAW Filter
Sound
IF
Mixer
Sound IF Filter
Loudspeaker
Vision
Demo-
dulator
Composite
Video
AM Sound
MSP 3410 B
SCART
Inputs
SCART1
SCART2
SCART3
2
2
2
2
SCART1
2
SCART2
Headphone
SCART
Outputs
I2S
optional
Feature
Processor
SBUS
AMU
DMA
According to the mixing characteristics of the Sound-IF mixer, the Sound-IF filter may be omitted.
. Fig. 3–1: Typical MSP 3410 B application
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PRELIMINARY DATA SHEET
MSP 3410 B
4. Architecture of the MSP 3410 B
Fig. 4–1 shows a simplified block diagram of the IC. Its
architecture is split into three functional blocks:
1. demodulator and decoder section
2. digital signal processing (DSP) section performing
audio baseband processing
3. analog section containing two A/D-converters,
6 D/A-converters, and channel selection
4.1. Demodulator Block
4.1.1. Analog Sound IF – Input Section
The input pins ANA_IN1+, ANA_IN2+ and ANA_IN– of-
fer the possibility to connect two different sound IF
sources to the MSP 3410 B. By means of bit [8] of
AD_CV (see Table 11–2) either terrestrial or satellite
sound IF signals can be selected. The analog-to-digital
conversion of the preselected sound IF signal is done by
a flash-converter, whose output can be used to control
an analog automatic gain circuit (AGC), providing opti-
mum level for a wide range of input levels. It is possible
to switch between automatic gain control and a fixed
(setable) input gain. In the optimum case, the input
range of the AD converter is completely covered by the
sound if source. Some combinations of SAW filters and
sound IF mixer ICs however show large picture compo-
nents on their outputs. In this case filtering is recom-
mended. It was found, that the high pass filters formed
by the coupling capacitors at pins ANA_IN1+ and
ANA_IN2+ (as shown in the application diagram) are
sufficient in most cases.
4.1.2. Quadrature Mixers
The digital input coming from the integrated A/D conver-
ter may contain audio information at a frequency range
of theoretically 0 to 9 MHz corresponding to the selected
standards. By means of two programmable quadrature
mixers two different audio sources, for example NICAM
and FM-mono, may be shifted into baseband position.
In the following, the two main channels are provided to
process either:
– NICAM (channel 1) and FM mono (channel 2) simulta-
neously or, alternatively,
– FM2 (channel 1) and FM1 (channel 2).
Two independent digital oscillators are provided to gen-
erate two pairs of sin/cos-functions. Two programmable
increments, to be divided up into Low- and High Part,
determine frequency of the oscillator, which corre-
sponds to the frequency of the desired audio carrier. In
section 11.1., format and values of the increments are
listed.
S_DA_OUT
S_CL
S_DA_IN S_ID
I2S_DA_OUT I2S_CL
I2S_DA_IN I2S_WS
Sound IF
ANA_IN1+
ANA_IN2+
Mono
MONO_IN
SC1_IN_L
SCART1
SC1_IN_R
SC2_IN_L
SCART2
SC2_IN_R
SC3_IN_L
SCART3
SC3_IN_R
SBUS Interface
Demodulator
IDENT
A/D
A/D
S1...4
I2SL/R I2SL/R
FM1
FM2
NICAM A
NICAM B
LOUD-
SPEAKER L
LOUD-
SPEAKER R
DFP
IDENT
HEADPHONE L
HEADPHONE R
SCART_L
SCART_R
SCART_L
SCART_R
I2S Interface
D/A
D/A
D/A
D/A
D/A
D/A
SCART Switching Facilities
Fig. 4–1: Architecture of the MSP 3410 B
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DACM_L
Loudspeaker
DACM_R
DACA_L
Headphone
DACA_R
SC1_OUT_L
SCART 1
SC1_OUT_R
SC2_OUT_L
SCART 2
SC2_OUT_R
9


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MSP 3410 B
PRELIMINARY DATA SHEET
VREFTOP
ANA_IN1+
ANA_IN2+
ANA_IN-
AD_CV[7:1]
AGC
AD_CV[8]
AD
FRAME
NICAMA
DCO2
Pins
Internal signal lines (see fig. 4–5)
Control registers
Fig. 4–2: Demodulator architecture
DCO1
Oscillator
FIR_REG_1
MODE_REG[6,7,10]
Phase
DQPSK
Decoder
Mixer
Lowpass
CORDIC
MSP sound IF channel 1 Amplitude
Differen-
tiator
Carrier
Detect
NICAM
Decoder
Mute
AD_CV[9]
MSP sound IF channel 2 Amplitude
Carrier
Detect
Mixer
Lowpass
Oscillator
FIR_REG_2
CORDIC
Differen-
tiator
Phase
Mute
MODE_REG[8]
DCO2
N_DA
N_CL
FRAME
CW_DA
CW_CL
NICAMA
NICAMB
Lowpass
FM2
Mixer
IDENT
Lowpass
FM1/AM
4.1.3. Lowpass Filtering Block for Mixed Sound IF
Signals
By means of decimation filters the sampling rate is re-
duced. Then, data shaping and/or FM bandwidth limita-
tion is performed by a linear phase Finite Impulse Re-
sponse (FIR-filter). Just like the oscillators’ increments
the filter coefficients are programmable and are written
into the IC by the CCU via the control bus. Thus, for ex-
ample, different NICAM versions can easily be implem-
ented. Two not necessarily different sets of coefficients
are required, one for channel 1 (NICAM or FM2) and one
for channel 2 (FM1=FM-mono). In section 11.2.3. sever-
al coefficient sets are proposed.
Since both MSP channels are designed to process the
German FM Stereo System with the same FIR coeffi-
cient set (despite 7 dB power level difference of the two
sound carriers), the MSP channel 1 has an internal over-
all gain of 6 dB. To process two carriers of identical pow-
er level these 6 dBs have to be taken into account by de-
creasing the values of the channel 1 coefficient set,
which has already been done in table 11–7.
4.1.4. CORDIC Block
The filtered sound IF signals are demodulated by trans-
forming the incoming signals from Cartesian into polar
format by means of a CORDIC processor block. On the
output, the phase and amplitude is available for further
processing. AM signals are derived from the amplitude
information whereas the phase information serves for
FM and NICAM (DQPSK) demodulation.
4.1.5. Differentiators
FM demodulation is completed by differentiating the
phase information output of the CORDIC block.
4.1.6. Lowpass Filter Block for Demodulated
Signals
The demodulated FM and AM signals are further low-
pass filtered and decimated to a final sampling frequen-
cy of 32 kHz. The usable bandwidth of the final base-
band signals is about 15 kHz.
4.1.7. High Deviation FM Mode
By means of MODE_REG [9], the maximum FM-devi-
ation can be extended to approximately ±360 kHz. Since
this mode can be applied only for the MSP sound IF
channel 2, the corresponding matrices in the baseband
processing must be set to sound A. Apart from this, the
coefficient sets 380 kHz FIR_REG2 or 500 kHz
FIR_REG2 must be chosen for the FIR_REG_2. In rela-
tion to the normal FM-mode, the audio level of the high-
deviation mode is reduced by 6 dB.
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PRELIMINARY DATA SHEET
MSP 3410 B
4.1.8. MSP-Mute Function in the Dual Carrier FM
Mode
To prevent noise effects or FM identification problems in
the absence of one of the two FM carriers the MSP 3410
B offers a carrier detection feature, which must be acti-
vated by means of AD_CV[9], see section 11.2.1. If no
FM carrier is available at the MSP channel 1, the corre-
sponding channel FM2 (and S-Bus output samples 3
and 4) are muted. If no FM carrier is available at the MSP
channel 2, the corresponding channel FM1 (and S-Bus
output samples 1 and 2) are muted. In case of the ab-
sence of both FM carriers pure noise will be amplified by
the input AGC. Therefore a proper mute function de-
pends on the noise quality of the TV set’s IF part and
cannot be guaranteed. The mute function is not recom-
mended for the satellite mode.
4.1.9. DQPSK-Decoder
In case of NICAM-mode the phase samples are de-
coded according the DQPSK-Coding scheme. The out-
put of this block contains the original NICAM-bitstream,
which is available at the N-Bus interface.
4.1.10. NICAM-Decoder
Before any NICAM decoding can start, the MSP must
lock to the NICAM frame structure by searching and syn-
chronizing to the so-called Frame Alignment Words
(FAW).
To reconstruct the original digital sound samples the NI-
CAM-bitstream has to be descrambled, deinterleaved
and rescaled. Also bit error detection and correction
(concealment) is performed in this NICAM specific
block.
To facilitate the Central Control Unit CCU to switch the
TV-set to the actual sound mode, control information on
the NICAM mode and bit error rate are supplied by the
the NICAM-Decoder. It can be read out via the I2C-Bus.
4.2. Analog Section: SCART Switches and Standby
Mode
The analog input and output sections offer a wide range
of switching facilities, which are shown in Fig. 4–3.To de-
sign a TV set with 3 pairs of SCART-inputs and two pairs
of SCART-outputs, no external switching hardware is re-
quired.
The switches are controlled by the ACB bits defined in
the audio processing interface (see section 12. Pro-
gramming the Audio Processing Part).
If the MSP 3410 B is switched off by first pulling STAND-
BYQ low and then disconnecting the 5V but keeping the
8V power supply (‘Standby’-mode), the switches S1,
ITT Semiconductors
S2 and S3 maintain their position and function. This fa-
cilitates the copying from selected SCART-inputs to
SCART-outputs in the TV-set’s standby mode.
SCART_IN
SC1_IN_L/R
MONO_IN
SC1_IN_L/R
SC3_IN_L/R
ACB[1:0]
00 to Audio Baseband
Processing (DFP_IN)
01 A
10 D
11
S1
SCARTL/R
ACB[3:2]
from Audio Baseband
Processing (DFP)
D
SCARTL/R
A
00
01
10
11
S2
ACB[5:4]
SCART_OUT
SC1_OUT_L/R
00
01
10
S3
SC2_OUT_L/R
Fig. 4–3: SCART-Switching Facilities
Bold lines determine the default configuration
In case of power-on start or starting from standby, the IC
switches automatically to the default configuration,
shown in the figure above. This action takes place after
the first I2C transmission into the DFP part. By transmit-
ting the ACB register first, the individual default setting
mode of the TV set can be defined.
4.3. MSP 3410 B Audio Baseband Processing
By means of the DFP processor all audio baseband
functions are performed by digital signal processing
(DSP). The DSP functions are grouped into three pro-
cessing parts: Input preprocessing, channel selection
and channel postprocessing.
The input preprocessing is intended to prepare the vari-
ous signals of all input sources in order to form a stan-
dardized signal at the input to the channel selector. The
signals can be adjusted in volume, are processed with
the appropriate deemphasis and are dematrixed if nec-
essary.
Having prepared the signals that way, the channel selec-
tor makes it possible to distribute all possible source sig-
nals to the desired output channels.
The ability to route in an external coprocessor for special
effects like graphic equalizer, surround processing, and
sound field processing is of special importance. Routing
can be done with each input source and output channel
via the I2S inputs and outputs.
All input and output signals can be processed simulta-
neously with the exception that FM2 cannot be pro-
11


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MSP 3410 B
PRELIMINARY DATA SHEET
cessed at the same time as NICAM. Note that the NI-
CAM input signals are only available in the MSP 3410 B
version. While processing the adaptive deemphasis, no
dual carrier stereo (German or Korean) or NICAM pro-
cessing is possible. Identification values are not valid ei-
ther.
4.4. Dual Carrier FM Stereo/Bilingual Detection
In the German and Korean TV standard, audio informa-
tion can be transmitted in three modes: Mono, stereo or
bilingual. To obtain information about the current audio
operation mode, the MSP 3410 B detects the so-called
identification signal. Information is supplied via the Ste-
reo Detection Register to an external CCU.
IDENT
AM
Demodu-
lation
Stereo
Detection
Filter
Bilingual
Detection
Filter
Level
Detect
Level
Detect
Fig. 4–4: Stereo/bilingual detection
Stereo
Detection
Register
Analog
Inputs
SCARTL
SCARTR
FM1
FM2
Demodulated
IF
Inputs
NICAMA
NICAMB
Prescale
DC level readout FM1
Adaptive
Deemphasis
Deemphasis
50/75 µs
J17
DC level readout FM2
Prescale
Prescale
FM-Matrix
Deemphasis
J17
SBUS
Inputs
SBUS1
SBUS2
SBUS3
SBUS4
I2S Bus
Inputs
I2SL
I2SR
Fig. 4–5: Audio baseband processing (DFP-Firmware)
Loudspeaker
Channel
Matrix
Bass
Treble
Loudness
Spatial Effects
Volume
Balance
Loudspeaker L
Loudspeaker R
Loudspeaker
Outputs
Beeper
Headphone
Channel
Matrix
Volume
Headphone L
Headphone R
Headphone
Outputs
SCART
Channel
Matrix
Volume
SCARTL
SCARTR
SCART
Outputs
I2S
Channel
Matrix
I2SL I2S
Outputs
I2SR
Quasi-Peak
Detector
Quasi peak readout L
Quasi peak readout R
Note: Actually, the source
of the Quasi-Peak Detector
is always the signal of the
loudspeaker channels.
NICAMA Internal signal lines (see fig. 4–2)
Table 4–1: Some examples for recommended channel assignments for demodulator and audio processing part
Mode
B/G-Stereo
B/G-Bilingual
NICAM-I-ST/
FM-mono
Sat-Mono
Sat-Stereo
Sat-Bilingual
Sat-High Dev.
Mode
MSP Sound IF-
Channel 1
FM2 (5.74 MHz): 2R
FM2 (5.74 MHz): Sound B
NICAM (6.552 MHz)
not used
7.2 MHz: R
7.38 MHz: Sound C
don’t care
MSP Sound IF-
Channel 2
FM1 (5.5 MHz): L+R
FM1 (5.5 MHz): Sound A
FM (6.0 MHz): mono
FM (6.5 MHz): mono
7.02 MHz: L
7.02 MHz: Sound A
6.552 MHz
FM-
Matrix
B/G Stereo
No Matrix
No Matrix
No Matrix
No Matrix
No Matrix
No Matrix
Channel-
Select
Speakers: FM
Speakers: FM
H. Phone: FM
Speakers: NICAM
H. Phone: FM
Speakers: FM
Speakers: FM
Speakers: FM
H. Phone: FM
Speakers: FM
H. Phone: FM
Channel
Matrix
Stereo
Speakers: Sound A
H. Phone: Sound B
Speakers: Stereo
H. Phone: Sound A
Sound A
Stereo
Speakers: Sound A
H. Phone: Sound B=C
Speakers: Sound A
H. Phone: Sound A
12 ITT Semiconductors


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PRELIMINARY DATA SHEET
MSP 3410 B
5. Control Bus Interface
As a slave receiver, the MSP 3410 B can be controlled
via I2C bus. Access to internal memory locations is
achieved by subaddressing. The FP processor and the
DFP processor parts have two separate subaddressing
register banks.
In order to allow for more MSP 3410 B IC’s to be con-
nected to the control bus, an ADR_SEL pin has been im-
plemented. With ADR_SEL pulled to high, the MSP
3410 B responds to changed device addresses, thus
two identical devices can be selected. Other devices of
the same family will have different subaddresses (e.g.
34X0).
By means of the RESET bit in the CONTROL register all
devices with the same device address are reset.
The IC is selected by asserting a special device address
in the address part of a I2C transmission. A device ad-
dress pair is defined as a write address (80 hex or 84
hex) and a read address (81 hex or 85 hex). Writing is
done by sending the device write address first, followed
by the subaddress byte, two address bytes, and two
data bytes. For reading, the read address has to be
transmitted first by sending the device write address (80
hex or 84 hex) followed by the subaddress byte and two
address bytes. Without sending a stop condition, read-
ing of the addressed data is done by sending the device
read address (81 hex or 85 hex) and reading two bytes
of data. Refer to Fig. 5–1: I2C Bus Protocol and section
5.2. Proposal for MSP 3410 B I2C Telegrams.
Due to the internal architecture of the MSP 3410 B, the
IC cannot react immediately to an I2C request. The typi-
cal response time is about 0.3 ms for the DFP processor
part and 1 ms for the FP processor part if NICAM proces-
sing is active. If the receiver (MSP) can’t receive another
complete byte of data until it has performed some other
functions, for example servicing an internal interrupt, it
can hold the clock line I2C_CL LOW to force the trans-
mitter into a wait state. The positions within a transmis-
sion where this may happen are indicated by ’Wait’ in
section 5.1. The maximum Wait-period of the MSP dur-
ing normal operation mode is less than 7 ms.
I2C-Bus error conditions (valid only from TC17 on):
In case of any internal error, the MSPs wait-period is ex-
tended to 7.07 ms. Afterwards the MSP does not ac-
knowledge (NAK) the device address. The data line will
be left HIGH by the MSP and the clock line will be re-
leased. The master can then generate a STOP condition
to abort the transfer.
By means of NAK, the master is able to recognize the er-
ror state and to reset the IC via I2C-Bus. While transmit-
ting the reset protocoll (s. 5.2.4.) to ‘CONTROL’, the
master must ignore the not acknowledge bits (NAK) of
the MSP.
Table 5–1: I2C Bus Device and Subaddresses
Name
MSP
CONTROL
TEST
WR_FP
RD_FP
WR_DFP
RD_DFP
Binary Value
1000 000x
0000 0000
0000 0001
0001 0000
0001 0001
0001 0010
0001 0011
Hex Value
Hex Value
ADR_SEL=low
ADR_SEL=high
80/81
84/85
00
01
10
11
12
13
Mode
R/W
W
W
W
W
W
W
Function
MSP device address
software reset
only for internal use
write address FP
read address FP
write address DFP
read address DFP
Table 5–2: Control Register
Name
CONTROL
MSB
RESET
ITT Semiconductors
14
0
13..1
0
LSB
0
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MSP 3410 B
PRELIMINARY DATA SHEET
5.1. Protocol Description
Write to DFP or FP
S
hex 80
Wait ACK sub-addr ACK addr-byte ACK addr-byte low ACK data-byte high ACK data-byte low ACK P
high
Read from DFP or FP
S hex 80 Wait ACK sub-addr ACK addr-byte ACK addr-byte ACK S
high low
hex 81
ÇÇÇ ÇÇÇWait ACK data-byte ACK data-byte NAK P
ÇÇÇÇÇÇ ÇÇÇÇÇÇhigh low
Write to Control or Test Registers
S
hex 80
Wait ACK
sub-addr
ACK
data-byte high
ACK
data-byte low
ACK P
Note: S =
P=
ACK =
NAK =
Wait =
I2C-Bus Start Condition from master
I2C-Bus Stop Condition from master
Acknowledge-Bit: LOW on I2C_DA from slave (= MSP, grey)
or master (= CCU, hatched)
Not Acknowledge-Bit: HIGH on I2C_DA from master (= CCU, hatched) to indicate ‘End of Read’
or from MSP indicating internal error state (not illustrated, only for version F7 on.)
I2C-Clock line held low by the slave (= MSP) while interrupt is serviced (< 7 ms)
I2C_DA
1
0
SP
I2C_CL
Fig. 5–1: I2C bus protocol (MSB first; data must be stable while clock is high)
5.2. Proposal for MSP 3410 B I2C Telegrams
5.2.1. Symbols
< Start Condition
> Stop Condition
aa Address Byte
dd Data Byte
5.2.2. Write Telegrams
<80 00 dd dd>
<80 10 aa aa dd dd>
<80 12 aa aa dd dd>
software RESET
write data into FP register
write data into DFP register
5.2.3. Read Telegrams
<80 11 aa aa <81 dd dd> read data from FP register
<80 13 aa aa <81 dd dd> read data from DFP register
14
5.2.4. Examples
<80 00 80 00>
<80 00 00 00>
<80 12 00 08 01 20>
RESET all MSP’s statically
clear RESET
set loudspeaker channel source
to NICAM and Matrix to STEREO
5.3. Start Up Sequence
After power on or RESET the IC is in an inactive state.
The CCU has to transmit the required coefficient set for
a given operation via the I2C bus. Initialization must start
with the demodulator part. If required for any reason,
from version F7 on, the audio processing part can be
loaded before the demodulator part.
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PRELIMINARY DATA SHEET
MSP 3410 B
6. N-Bus Interface
The N-Bus interface consists of two lines, N-data and
N-clock. The pure NICAM_728 data stream (before des-
crambling) is available together with a 728 kHz clock sig-
nal for the purpose of data transmission. N-Bus signals
are based on TTL-levels. Data are latched with the fall-
ing clock edge.
7. Pay-TV Interface
The MSP 3410 B facilitates the reception of encrypted
NICAM sound, which is provided by Pay-TV systems. By
means of bit 1 of the control word ‘MODE_REG’ the op-
eration mode ‘PAY-TV’ can be activated. The MSP 3410
B inherent descrambler generally uses a 9-bit start se-
quence, which initializes a pseudo random sequence
generator each ms. In normal operation mode the 9-bit
sequence exists of 9 bits having each high level, which
are loaded automatically into the descrambler’s shift
register. In the Pay-TV mode these bits have to be
loaded via the two pins CW_DA and CW_CL into the
mentioned shift register. The time window to load one
complete 9-bit sequence is given by the high time of the
frame signal which is available on pin 5. It is not neces-
sary to load a new sequence at each ms, because if no
new sequence has been transmitted, the old one is
saved. If less than 9 new bits at each ms are loaded, one
has to consider that any new incoming bit shifts the old
ones by one position inside the shift register. A complete
timing diagram is illustrated in Fig. 7–1.
8. Audio PLL and Crystal Specifications
The MSP 3410 B requires a 18.432 MHz (10 pF, parallel)
crystal. The clock supply of the whole system depends
on the MSP 3410 B operation mode:
1. FM-Stereo:
The system clock runs free on the crystal’s 18.432 MHz.
2. D2-MAC operation:
In this case, the system clock is locked to a synchroniz-
ing signal (DMA_SYNC) supplied by the D2-MAC chip.
The DMA and the AMU chips can be driven by the MSP
3410 B audio clock (AUD_CL_OUT).
3. NICAM and FM_mono:
An integrated clock PLL uses the 364 kHz baud-rate, ac-
complished in the NICAM demodulator block, to lock the
system clock to the bit rate respective 32 kHz sampling
rate of the NICAM transmitter. As a result, the whole au-
dio system is supplied with a controlled 18.432 MHz
clock.
Remark on using the crystal:
External capacitors at each crystal pin to ground are re-
quired. They are necessary for tuning the open-loop fre-
quency of the internal PLL and for stabilizing the fre-
quency in closed-loop operation. The higher the
capacitors, the lower the clock frequency results. The
nominal free running frequency should match the center
of the tolerance range between 18.433 and 18.431 MHz
as closely as possible.
Frame
8 Bits
CW-Clock
CW-Data
CW-Clock
Min: 10 kHz
Max: 4 MHz
T 7E-6 s
Fig. 7–1: Timing for Pay-TV signals
ITT Semiconductors
720 Bits
Start
of Descrambler
End
T
123456789
Period to load CW-Word
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MSP 3410 B
PRELIMINARY DATA SHEET
9. S-Bus Interface
Digital audio information provided by the DMA2381 via
the AMU is serially transmitted to the MSP 3410 B via the
S-Bus. The MSP 3410 B always has the master function.
The S-Bus interface consists of four pins:
1. S_DA_IN:
Four channels (4*16 bits) per sampling cycle (32 kHz)
are transmitted.
2. S_CL:
Gives the timing for the transmission of S-DATA
(4.608 MHz).
3. S_ID:
After 64 S-CLOCK cycles the S_ID determines the end
of one sampling period.
4. S_DA_OUT:
FM-Demodulator or NICAM decoder output for test pur-
pose.
10. I2S Bus Interface
By means of this standardized interface, additional fea-
ture processors can be connected to the MSP 3410 B.
Two possible formats are supported: The standard
mode (MODE_REG[4]=0) selects the SONY format,
where the I2S_WS signal changes at the word bound-
aries. The so-called PHILIPS format, which is character-
ized by a change of the I2S_WS signal one I2S_CL peri-
od before the word boundaries, is selected by setting
MODE_REG[4]=1.
The MSP 3410 B normally serves as the master on the
I2S interface. Here the clock and word strobe lines are
driven by the MSP 3410 B. By setting MODE_REG[3]=1,
the MSP 3410 B is switched to a slave mode. Now these
lines are input to the MSP 3410 B and the master clock
is synchronized to 576 times the I2S_WS rate (32 kHz).
No NICAM or D2MAC operation is possible in this mode.
The I2S bus interface consists of four pins:
1. I2S_DA_IN:
For input, two channels (2*16 bits) per sampling cycle
(32 kHz) are transmitted.
2. I2S_DA_OUT:
For output, two channels (2*16 bits) per sampling cycle
(32 kHz) are transmitted.
3. I2S_CL:
Gives the timing for the transmission of I2S serial data
(1.024 MHz).
4. I2S_WS:
The I2S_WS word strobe line defines the left and right
sample.
16 ITT Semiconductors


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PRELIMINARY DATA SHEET
MSP 3410 B
11. Programming the Demodulator Part
11.1. Write Registers: Table and Addresses
In Table 11–1 all Write Registers are listed.
All transmissions on the control bus are 16 bits wide.
Data for the demodulator part (FP) have 8 or 12 signifi-
cant bits. These data have to be inserted LSB bound and
filled with zero bits into the 16 bit transmission word.
Accessing a process address starts specific actions in
the FP processor. For example addressing register
60hex activates the internal transfer of all preloaded data
(MODE_REG, DCO1_LO/HI) into their final hardware
registers. It’s only the access of the address 60hex that
counts, the two data bytes in the transmission have no
meaning. Table 4–1 explains how to assign FM carriers
to the MSP-Sound IF channels and the corresponding
matrix modes in the audio processing part.
Table 11–1: MSP 3410 B write registers
Register
AD_CV
MODE_REG
FIR_REG_1
FIR_REG_2
DCO1_LO
DCO1_HI
DCO2_LO
DCO2_HI
FAWCT_SOLL
FAW_ER_TOL
AUDIO_PLL
Process
LOAD_REG_1/2
LOAD_REG_1
SEARCH_NICAM
SELF_TEST
Write
Address
(hex)
00BB
0083
0001
0005
0093
009B
00A3
00AB
0107
010F
02D7
Address
(hex)
0056
0060
0078
0792
Function
input selection, configuration of AGC and Mute Function and selection of A/D-
converter
mode register
serial shift register for 6 8 bit, filter coefficient channel 1 (48 bit)
serial shift register for 6 8 bit, + 2 12 bit off set (total 72 bit)
increment channel 1 Low Part
increment channel 1 High Part
increment channel 2 Low Part
increment channel 2 High Part
To synchronize to the frame structure of the NICAM bit stream, the MSP checks
the data for Frame Alignment Words (FAWs). After having captured the first
one, the MSP continues to check for n frame periods. On having found at least
n-m FAWs after this period, the frame synchronism is achieved and the MSP
switches to active NICAM-decoding. The value for n has to be loaded into
FAWCT_SOLL; the one for m into FAW_ER_TOL. Proposal : n=12; m=2
audio PLL in case of NICAM 0 always open
operation mode
1 to be closed = default
Function
After switch on or changing the TV system (B/G to I, I to B/G) all write-parame-
ters have to be transmitted via I2C-Bus into the MSP 3410 B. Then
‘Load_REG_1/2’ writes them into the corresponding registers. FM-processing
starts. These are MODE_REG, DCO1/2_LO/HI.
In the case of a TV-Standard change in MSP channel 1, only new channel 1
parameters have to be transmitted into the IC via I2C-Bus. These are:
MODE_REG, DCO1_LO/HI. LOAD_REG_1 sets up the MSP channel 1 with-
out interrupting the MSP channel 2 (FM1 or MONO channel).
To start the NICAM-processing, this address has to be transmitted into the FP.
Check of the FP ALU (for testing only)
Note: The WRITE-Addresses cannot be used to read back the corresponding register values.
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MSP 3410 B
PRELIMINARY DATA SHEET
11.2. Write Registers: Functions and Values
In the following, the functions of some registers are ex-
plained and their (default) values are defined:
11.2.1. Setting of Parameter AD_CV
Table 11–2: AD_CV Register
Bit
AD_CV [0]
AD_CV [6:1]
AD_CV [7]
AD_CV [8]
AD_CV [9]
AD_CV[10]
AD_CV[15:11]
Meaning
test
AD_CV 00BBhex
Reference level in case of Automatic Gain
Control = on (see Table 11–3). Constant gain
factor when Automatic Gain Control = off
(see Table 11–4).
Determination of Automatic Gain or Constant
Gain
Selection of analog input
MSP-Carrier-Mute Function
NICAM-FIFO-Watchdog (only for test mode)
reserved
Settings
0 = on (default)
1 = off (for testing)
0 = constant gain
1 = automatic gain
0 = ANALOG IN1
1 = ANALOG IN2
0 = off (no mute)
1 = on (mute as described in section
4.1.)
0 = on (default)
1 = off (for testing)
0
Table 11–3: Reference values for active AGC (AD_CV[7] = 1)
Application Input Signal Contains
Terrestrial TV
SAT
NICAM only
2 FM Carriers or
1 FM and
1 NICAM Carrier
1 or more
FM Carriers
1 NICAM Carrier only
AD_CV [6:1]
Ref. Value
101000
100011
010100
AD_CV [6:1]
in integer
40
Range of Input Signal
at pin 41 or 43
0.14 – 3 Vpp1)
35 0.14 – 3 Vpp1)
20 0.07 – 1.0 Vpp
1) For signals above 1.4 Vpp, the minimum gain of 3 dB is switched and overflow of the AD converter may result. Due
to the robustness of the internal processing, the IC works up to and even more than 3 Vpp, if norm conditions of FM/
NICAM or FM1/FM2 ratio are supposed. In this overflow case, a loss of FM-S/N-ratio of about 10 dB may appear.
18 ITT Semiconductors


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PRELIMINARY DATA SHEET
MSP 3410 B
Table 11–4: AD_CV parameters for constant input gain (AD_CV[7]=0)
Step
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
AD_CV [6:1]
Constant Gain
000000
000001
000010
000011
000100
000101
000110
000111
001000
001001
001010
001011
001100
001101
001110
001111
010000
010001
010010
010011
010100
Gain
3.00 dB
3.85 dB
4.70 dB
5.55 dB
6.40 dB
7.25 dB
8.10 dB
8.95 dB
9.80 dB
10.65 dB
11.50 dB
12.35 dB
13.20 dB
14.05 dB
14.90 dB
15.75 dB
16.60 dB
17.45 dB
18.30 dB
19.15 dB
20.00 dB
Input Level at pin ANA_IN1+ and ANA_IN2+
maximum input level: 3 Vpp (FM) or 1 Vpp (NICAM)1)
maximum input level: 0.14 Vpp
1) For signals above 1.4 Vpp, the minimum gain of 3 dB is switched and overflow of the AD converter may result. Due
to the robustness of the internal processing, the IC works up to and even more than 3 Vpp, if norm conditions of FM/
NICAM or FM1/FM2 ratio are supposed. In this overflow case, a loss of FM-S/N-ratio of about 10 dB may appear.
11.2.2. Control Register ‘MODE_REG’
The register ‘MODE_REG’ contains the control bits determining the operation mode of the MSP 3410 B; Table 11–5
explains all bit positions.
Table 11–5: Control word ‘MODE_REG’: all bits are “0” after power-on-reset
Bit Function
[0] DMA_SYNC1)
[1] PAYTV_EN
[2] DESCR_DIS
[3] I2S Mode1)
[4] I2S_WS Mode
[5] Audio_CL_OUT
[6] NICAM1)
MODE_REG 0083hex
Comment
Synchronization to DMA
Pay-TV
NICAM-Descrambler
Master/Slave mode of the
I2S bus
WS due to the Sony or
Philips-Format
Switch Audio_Clock_Output
to tristate
MSP-channel 1 mode
Definition
0 = NICAM (intern. Sync)
1 = D2MAC (ext. Sync)
0 = off
1 = on
0 = on
1 = off
0 = Master
1 = Slave
0 = Sony
1 = Philips
0 = on
1 = tristate
0 = FM
1 = Nicam
Recom-
mendation
X
0
0
X
X
X
X
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MSP 3410 B
PRELIMINARY DATA SHEET
Bit Function
MODE_REG 0083hex
Comment
Definition
[7] FM1 FM2
MSP-channel 1 mode
0 = Nicam
1 = FM
[8] FM AM
MSP-channel 1/2 mode
0 = FM
1 = AM
[9] HDEV
High Deviation Mode
(channel matrix must be
sound A)
0 = normal
1 = high deviation mode
[10] S-Bus Setting
configuration of internal
sound bus
0 = Nicam/FM-Mono
1 = Two Carrier FM
[11] S-Bus Mode2)
mode of sound bus3)
0 = Tristate
1 = Active
[15:12] reserved
reserved
must be 0
1) In case of NICAM operation, I2S-slave mode or synchronization to DMA not possible.
In case of synchonization to DMA, no I2S-slave mode or NICAM is allowed.
In case of I2S-slave mode, no synchonization to DMA or NICAM is allowed.
2) The normal operation mode is ‘Active’
3) To reduce radiation, the pins S_DA_OUT, S_CL, and S_ID should be switched to tristate if not
used. IF S-Bus Mode = ‘tristate’, pins ‘Frame’, N_CL, and N_DA are also switched to tristate.
Recom-
mendation
X
0
0
X
0
0
X: Depend-
ing on mode
11.2.3. FIR-Parameter
The following data values (see Table 11–6) are to be
transferred 8 bits at a time embedded LSB-bound in
a 16 bit word. Note: These sequences must be obeyed.
To change a coefficient set, the complete block
FIR_REG_1 or FIR_REG_2 must be transmitted. The
new coefficient set will be active without a load_reg rou-
tine.
Table 11–6: Loading sequence for FIR-coefficients
FIR_REG_1 0001hex (Channel 1: NICAM/FM2)
No. Symbol Name
Bits Value
1 NICAM/FM2_Coeff. (5) 8
2 NICAM/FM2_Coeff. (4) 8
see Table 11–7.
3 NICAM/FM2_Coeff. (3) 8
4 NICAM/FM2_Coeff. (2) 8
5 NICAM/FM2_Coeff. (1) 8
6 NICAM/FM2_Coeff. (0) 8
20
FIR_REG_2 0005hex (Channel 2: FM1/FM mono)
No. Symbol Name
Bits Value
1 * IMREG1 (8 LSBS) 8 04 HEX
2 * IMREG1 / IMREG2 8
(4 MSBs / 4 LSBs)
40 HEX
3 * IMREG2 (8 MSBs) 8 00 HEX
4 FM_Coef (5)
8 see Table
11–7.
5 FM_Coef (4)
8
6 FM_Coef (3)
8
7 FM_Coef (2)
8
8 FM_Coef (1)
8
9 FM_Coef (0)
8
* IMREG_1/2: Two 12-bit off-set constants
IMREG1 and IMREG2 are used to compensate for DC-
offset, which are inherent to the FIR filter structure. IM-
REG1 is valid for the FIR_REG_1, IMREG2 for
FIR_REG_2. In the Table above, IMREG1= IMREG2 =
004. Due to the partitioning to 8 bit units, the values
04hex, 40hex, and 00hex arise.
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MSP3410B Datasheet PDF
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PRELIMINARY DATA SHEET
MSP 3410 B
Table 11–7: 8 bit FIR-coefficients (decimal integer) for MSP 3410 B
FIR_REG_1 0001hex and FIR_REG_2 0005hex
NICAM
FM-
Ter-
res-
trial
B/G, I
FM - Satellite
FIR filtering corresponds to a bandpass filtering with a
band width of B = 130 kHz, 180 kHz, 200 kHz, ... 380 kHz
Auto-
search
or AM
B
fc frequency
Bandwidth (see also Table FM Volume Prescale)
C SC/
(i) SP/
F
FIR_
REG1
UK
FIR_
REG1
Ger-
man
Dual
FM
FIR_
REG1
and 2
130
kHz
FIR_
REG1
1)
130
kHz
FIR_
REG2
1)
180
kHz
FIR_
REG1
180
kHz
FIR_
REG2
200
kHz
FIR_
REG1
200
kHz
FIR_
REG2
280
kHz
FIR_
REG1
280
kHz
FIR_
REG2
380
kHz
FIR_
REG1
380
kHz
FIR_
REG2
500
kHz
FIR_
REG2
FIR_
REG2
0 –2
23
37 73
4
9
1
3 –4 –8 –1 –1 –1 75
1 –8
4 18 27 53 9 18 9 18 –4 –8 –6 –9 –1 19
2 –10 –6 27 32 64 14 28 14 27
2
4
–9 –16 –8
36
3 10 –4 48 60 119 23 47 24 48 19 36
4
5
2 35
4 50 40 66 51 101 27 55 33 66 41 78 38 65 59 39
5 86 94 72 65 127 32 64 37 72 57 107 70 123 126 40
1) The 130 kHz coefficients are based on subcarriers, which are 7 dB below an existent main carrier.
11.2.4. DCO-Increments
For a chosen TV standard a corresponding set of 24-bit
increments determining the mixing frequencies of the
quadrature mixers, has to be written into the IC. In Table
11–8 some examples of DCO increments are listed. It is
necessary to divide them up into low part and high part.
The formula for the calculation of the increments for any
chosen IF-Frequency is as follows:
INCRdez = int(f/fs 224)
with: int = integer function
f = IF-frequency in MHz
fS = sampling frequency (18.432 MHz)
Conversion of INCR into hex-format and separation of
the 12-bit low and high parts lead to the required incre-
ments. (DCO1_HI or _LO for channel 1, DCO2_HI or LO
for channel 2).
Table 11–8: DCO increments for the MSP 3410 B; frequency in MHz, increments in Hex
Frq. MHz
4.5
5.04
5.5
5.58
5.7421875
6.0
6.2
6.5
6.552
7.02
7.38
DCO1_LO 0093hex, DCO1_HI 009Bhex; DCO2_LO 00A3hex, DCO2_HI 00ABhex
DCO_HI
DCO_LO
Frq. MHz DCO_HI
DCO_LO
3E8 000
460 000
4C6 38E
4D8 000
4FC 0AA
5.76 500
5.85 514
5.94 528
000
000
000
535
555
6.6 5BA
AAA
561
C71
6.65 5C5
C71
5A4 71C 6.8 5E7 1C7
5B0 000
618 000 7.2 640 000
668 000 7.56 690 000
ITT Semiconductors
21


MSP3410B Datasheet PDF
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MSP 3410 B
PRELIMINARY DATA SHEET
11.3. Read Registers: Listing and Addresses
The following 8-bit parameters can be read out of the
RAM of the MSP 3410 B; functionally they all belong to
the NICAM decoding process; their addresses are listed
in Table 11–9.
All transmissions take place in 16 bit words. The valid 8
bit data are the 8 LSBs of the received data word.
To enable correct switching to NICAM sound, at least the
register C_AD_BITS must be read and evaluated by the
CCU. Additional data bits and CIB bits, if supplied by the
NICAM transmitter, as well as information about the sig-
nal quality can be obtained by reading the remaining
registers.
Table 11–9: Addresses of read registers
Read Registers
C_AD_BITS
FAWCT_IST
ADD_BITS
CIB_BITS
CONC_CT
HEX
0023
0025
0038
003E
0058
11.4. Read Registers: Functions and Values
C_AD_BITS: NICAM operation mode control bits and
A[0–2] of the additional data bits.
Format:
MSB
7
6
C_AD_BITS 0023hex
5432
A[2] A[1] A[0] C4 C3 C2
LSB
10
C1 S
Important: “S” = Bit[0] indicates correct NICAM-syn-
chronization (S=1). If S = 0, no correct frame or se-
quence synchronization have been found yet and the
read registers are not valid.
The operation mode is coded by C4-C1 as shown in
Table 11–10.
ADD_BITS: Contains the remaining 8 of the 11 addition-
al data bits. The additional data bits are yet not defined
by the NICAM 728 system.
22
Format:
MSB
ADD_BITS 0038hex
LSB
7 6543210
A[10] A[9] A[8] A[7] A[6] A[5] A[4] A[3]
CIB_BITS: cib bits 1 and 2 (see NICAM 728 specifica-
tions)
Format:
MSB
7
x
6
x
CIB_BITS 003Ehex
5432
xxxx
LSB
10
CIB1 CIB2
FAWCT_IST: The contents of this register give informa-
tion on the actual position of the FAW-counter. For opti-
mum NICAM performance, the value should be identical
with or little below the value of ’FAW_SOLL’. If it reaches
0 the FP-software mutes and stops the NICAM-decod-
ing automatically by searching for FAW synchronization
once more.
CONC_CT: This register contains the actual number of
bit errors of the previous 728 bit data frame. It may hap-
pen that in spite of acceptable FAWCT_IST the bit error
rate result is too high for appropriate sound perform-
ance. In this case the CCU can switch to the analog FM-
sound assumed to have the same program (Control bit
C4).
Table 11–10: NICAM operation modes as defined by
the EBU NICAM 728 specification
C4 C3 C2 C1 Operation Mode
0 0 0 0 Stereo sound (NICAMA/B), indepen-
dent mono sound (FM1)
0 0 0 1 Two independent mono signals (NI-
CAMA, FM1)
0 0 1 0 Three independent mono channels
(NICAMA, NICAMB, FM1)
0 0 1 1 Data transmission only; no audio
1 0 0 0 Stereo sound (NICAMA/B), FM1 car-
ries same channel
1 0 0 1 One mono signal (NICAMA). FM1
carries same channel as NICAMA
1 0 1 0 Two independent mono channels
(NICAMA, NICAMB). FM1 carries
same channel as NICAMA
1 0 1 1 Data transmission only; no audio
x 1 x x Unimplemented sound coding option
(not yet defined by EBU NICAM 728
specification)
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PRELIMINARY DATA SHEET
MSP 3410 B
11.5. Sequences to Transmit Parameters and to
Start Processing
After having been switched on, the MSP has to be initial-
ized by transmitting the parameters according to the
LOAD_SEQ_1/2 of Table 11–11. To make the data ac-
tive, the load routine LOAD_REG_1/2 must be acti-
vated.
For NICAM operation the following steps listed in ‘NI-
CAM_START, _READ and _Check’ in Table 11–11 must
be taken.
For FM-stereo operation the evaluation of the identifica-
tion signal must be performed. For positive identification
check, the MSP 3410 B sound channels have to be
switched corresponding to the detected operation
mode.
Table 11–11: Sequences to initialize and start the MSP 3410 B
LOAD_SEQ_1/2: General Initialization, followed by LOAD_REG_1/2
Write into MSP 3410 B:
0. AD_CV
1. Audio_PLL
2. FAWCT_SOLL
3. FAW_ER_TOL
4. FIR_REG_1
5. FIR_REG_2
6. MODE_REG
7. DCO1_LO
8. DCO1_HI
9. DCO2_LO
10. DCO2_HI
11. start LOAD_REG_1/2 process;
FM-processing starts
(only for NICAM mode)
(only for NICAM mode)
In the case
“NICAM only” operation, the
steps 9. and 10. can be
skipped
Note: To ensure software
compatibility to the MSP3400 B,
before any modification of a
demodulator parameter con-
cerning an active output channel,
this channel should be muted
NICAM_START: Start of the NICAM Software
Write into MSP 3410 B:
1. Start SEARCH_NICAM Process
2. Wait at least 0.5 s
NICAM_READ: Read NICAM specific information
Read out of MSP 3410 B:
1. FAWCT_IST
2. C_AD_BITS
3. CONC_CT
NICAM_CHECK: CCU checks for presence, operation mode and quality of NICAM signal
1. Evaluation of all three parameters in the CCU (see section 11.4.)
2. If necessary, switch the corresponding sound channels within the audio processing part
FM_IDENT_CHECK: Decoding of the identification signal
1. Evaluation of the stereo detection register (DFP register 0018hex, high part)
2. If necessary, switch the corresponding sound channels within the audio processing part
LOAD_SEQ_1: Reinitialization of Channel 1 without affecting Channel 2, followed by LOAD_REG_1
Write into MSP 3410 B:
1. FIR_REG_1
2. MODE_REG
3. DCO1_LO
4. DCO1_HI
5. start LOAD_REG_1 process
(6 8 bit)
(12 bit)
(12 bit)
PAUSE: Duration of “Pause” determines the repetition rate of the NICAM or the FM_IDENT-check
AUDIO PROCESSING INIT: Initialization of Audio Processing Part, which may be customer dependant (see section 12.)
ITT Semiconductors
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MSP 3410 B
PRELIMINARY DATA SHEET
11.6. Software Proposals for Multistandard TV-Sets
To familiarize the reader with the programming scheme
of the MSP 3410 B demodulator part, three examples in
the shape of flow diagrams are shown in the following
sections.
11.6.1. Multistandard Including System B/G with NI-
CAM/FM-Mono only
Fig. 11–1 shows a flow diagram for the CCU software,
applied for the MSP 3410 B in a TV set, which facilitates
NICAM and FM-mono sound. For the instructions,
please refer to Table 11–11.
START
LOAD_SEQ_1/2
Channel 1:
NICAM Parameter
Audio Processing Init
NICAM_START
Pause
NICAM_READ
Yes
NICAM_CHECK
NICAM
?
No
LOAD_REG_1
Fig. 11–1: CCU software flow diagram: Standard B/G/I
NICAM/FM mono only
the MSP 3410 B must be switched to the FM-mono
sound.
11.6.2. Multistandard Including System I with NI-
CAM/FM-Mono only
This case is identical to the one above. The only differ-
ence consists in selecting the UK parameters for
DCO1_LO/HI, DCO2_LO/HI and FIR_REG_1.
11.6.3. Multistandard Including System B/G with NI-
CAM/FM-Mono and German DUAL FM
Fig. 11–3 shows a flow diagram for the CCU software,
applied for the MSP 3410 B in a TV set, which facilitates
all standards according to System B/G. For the instruc-
tions used in the diagram, please refer to Table 11–11.
After having switched on the TV-set and having initial-
ized the MSP 3410 B (LOAD_SEQ_1/2), FM-mono
sound is available.
Fig. 11–3 shows that to check for any stereo or bilingual
audio information in channel 1, its parameter should be
loaded with NICAM and FM2 parameters alternately
(LOAD_SEQ_1). In the case of success the MSP 3410
B has to switch to the desired audio mode.
11.6.4. Satellite Mode
Fig. 11–2 shows the simple flow diagram to be used for
the MSP 3410 B in a satellite receiver. For FM-mono op-
eration the corresponding FM carrier should preferably
be processed at the MSP-channel 2.
START
LOAD_SEQ_1/2
MSP–Channel 1:
FM2–Parameter
MSP–Channel 2:
FM1–Parameter
Audio Processing Init
If the program is changed, resulting in another program
within the Scandinavian System B/G no parameters of
the MSP 3410 B have to be modified. To facilitate the
check for NICAM the CCU has only to continue at the ’NI-
CAM_START’ instruction. During the ’NICAM_CHECK’
24
STOP
Fig. 11–2: CCU software flow diagram: SAT-mode
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MSP3410B Datasheet PDF
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PRELIMINARY DATA SHEET
MSP 3410 B
START
LOAD_SEQ_1/2
Channel 1:
NICAM Parameter
Audio Processing Init
Pause
NICAM_START
1)
NICAM_READ
1)
NICAM_READ
Yes
NICAM_CHECK
NICAM
?
No
LOAD_SEQ_1
Channel 1:
FM2 Parameter
Pause
Yes FM_
IDENT_CHECK
Pilot?
No
LOAD_SEQ_1
Channel 1:
NICAM Parameter
11.6.5. Automatic Search Function for FM-Carrier
Detection
The AM demodulation ability of the MSP 3410 B offers
the possibility to calculate the “field strength” of the mo-
mentarily selected FM carrier which can be read out by
the CCU. In SAT receivers this feature can be used to
realize an automatic FM carrier search.
Therefore, the MSP has to be switched to AM-mode
(Bit 8 of MODE_REG). The sound-IF frequency range
must now be “scanned” in the MSP-channel 2 by means
of the programmable quadrature mixer with an appropri-
ate incremental frequency (i.e. 10 kHz).
After each incrementation there is a field strength value
available at the DC level register FM1, which must be ex-
amined for relative maxima by the CCU. This results in
either continuing search or switching the MSP back to
FM demodulation mode.
During the search process the FIR_REG_2 must be
loaded with the coefficient set “AUTOSEARCH”, which
enables small bandwidth resulting in appropriate field
strength characteristics. The absolute field strength val-
ue (can be read out of “DC Level Readout FM1”) also
gives information on whether a main FM carrier or a sub-
carrier was detected, and as a practical consequence
the FM bandwidth (FIR_REG_1/2) and the deemphasis
(50 µs or adaptive) can be switched automatically. For
a detailed description of the automatic search function
please refer to the corresponding MUBI program.
11.6.6. Automatic Standard Detection
The AM demodulation ability of the MSP 3410 B enables
also a simple method to decide between standard B/G
(FM-carrier at 5.5 MHz) and standard I (FM-carrier at 6.0
MHz). It is achieved by tuning the MSP in the AM-mode
to the two discrete frequencies and evaluating the field
strength via the DC level register.
Fig. 11–3: CCU software flow diagram: Standard B/G
with NICAM or FM stereo
1) The first READ could result in incorrect values.
ITT Semiconductors
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MSP3410B Datasheet PDF
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MSP 3410 B
PRELIMINARY DATA SHEET
12. Programming the Audio Processing Part
12.1. Summary of the DSP Control Registers
Control registers are 16 bit wide. Transmissions via I2C
bus have to take place in 16 bit words. Single data en-
tries are 8 bit. Some of the defined 16 bit words are di-
vided into low and high byte, thus holding two different
control entities.All control registers are readable.
Name
I2C Bus High/ Adjustable Range, Operational Modes
Address Low
Reset Mode
Volume loudspeaker channel
Balance loudspeaker channel [L/R]
Bass loudspeaker channel
Treble loudspeaker channel
Loudness loudspeaker channel
Spatial effect loudspeaker channel
Volume headphone channel
Volume SCART channel
Loudspeaker channel source
Loudspeaker channel matrix
0000hex
0001hex
0002hex
0003hex
0004hex
0005hex
0006hex
0007hex
0008hex
H
H
H
H
H
H
H
H
H
L
[+12 dB ... –94 dB, MUTE]
[0..100% / 100% or 100% / 0..100%]
[+12 dB ... –12 dB]
[+12 dB ... –12 dB]
[0 dB ... +17 dB]
[OFF, ON]
[+12 dB ... –77 dB, MUTE]
[00hex ... 7Fhex]
[FM, NICAM, SCART, SBUS12, SBUS34, I2S]
[SOUNDA, SOUNDB, STEREO]
MUTE
100%/100%
0 dB
0 dB
0 dB
OFF
MUTE
00hex
FM
SOUNDA
Headphone channel source
0009hex H
[FM, NICAM, SCART, SBUS12, SBUS34, I2S] FM
Headphone channel matrix
L [SOUNDA, SOUNDB, STEREO]
SOUNDA
SCART channel source
000ahex H
[FM, NICAM, SCART, SBUS12, SBUS34, I2S] FM
SCART channel matrix
L [SOUNDA, SOUNDB, STEREO]
SOUNDA
I2S channel source
000bhex H
[FM, NICAM, SCART, SBUS12, SBUS34, I2S] FM
I2S channel matrix
Quasi-peak detector source
ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉPrescale SCART
000chex
000dhex
L
H
H
[SOUNDA, SOUNDB, STEREO]
[FM, NICAM, SCART, SBUS12, SBUS34, I2S]
[00hex ... 7Fhex]
SOUNDA
FM (see note)
00hex
Prescale FM
000ehex H
[00hex ... 7Fhex]
00hex
FM matrix
L [NO_MAT, GSTEREO, KSTEREO]
NO_MAT
(see note)
Deemphasis FM
000fhex H
[OFF, 50 µs, 75 µs, J17]
50 µs
Adaptive Deemphasis FM
Prescale NICAM
ÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇDeemphasis NICAM
ÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇÇACB Register (SCART Switches and
0010hex
0011hex
0013hex
L
H
H
H
[OFF, WP1]
[00hex ... 7Fhex]
[OFF, J17]
Bits [7..0]
OFF (s. note)
00hex
J17 (s. note)
00hex
DIG_OUT Pins)
Beeper
Identification Mode
Special SCART Mode
0014hex H/L [00hex ... 7Fhex]/[00hex ... 7Fhex]
0015hex L
[B/G, M]
0016hex
reserved for future use
0/0 (s. note)
B/G
Unused parts of the 16 bit registers must be zero.
ËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËNote: For future compatibility to new technical codes of the MSP3410 B or the MSP3400 B some coefficients concerning
features not implemented or not changeable yet must nevertheless be initialized. Please consider the following compatibility
ËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËrestrictions:
ËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËË– Quasi peak source must always be the same as the speaker source
ËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËË– NICAM deemphasis switching facility not yet implemented, NICAM deemphasis must be switched on
– Panda1, if switched on, must always be activated together with 75 µs deemphasis
Ë ËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËË– Panda1 must be switched off if NICAM is selected
– FM dematrix must be switched off if Panda1 is selected
Ë ËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËË– Beeper off: set frequency to 0 and volume to 0;
ËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËËË– Beeper on: set frequency to 40hex and set volume; beeper frequency not yet variable
26 ITT Semiconductors


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PRELIMINARY DATA SHEET
MSP 3410 B
Volume Loudspeaker Channel
Volume loudspeaker
channel
+12 dB
+11 dB
+1 dB
0 dB
–1 dB
–77 dB
–94 dB
Mute
0000hex
H
0111 1111
7Fhex
0111 1110
7Ehex
0111 0100 74hex
0111 0011
0111 0010
73hex
72hex
0010 0110 26hex
0001 0101 15hex
0000 0000... 0 –
0001 0100 14hex
The highest positive 8 bit number yields in a maximum
possible gain of 12 dB. Decreasing the volume register
by 1 LSB decreases volume by 1 dB. The minimum vol-
ume without loudness is –77 dB. Together with loud-
ness, the volume range can be increased by the actual
loudness setting. Setting loudness to 17 dB, the lowest
possible volume is –94 dB. Volume settings lower than
the given minimum mute the output. With large scale in-
put signals, positive volume settings may lead to signal
clipping.
To prevent severe clipping effects with bass or treble
boosts, the internal volume is automatically limited to a
level where in combination with either bass or treble set-
ting the amplification does not exceed 12 dB. For exam-
ple: setting bass to +9 dB and treble to +5, the maximum
possible volume is +3 dB. Values higher than +3 dB are
internally limited to +3 dB.
Please consider that even if the loudspeaker or the
headphone or both channels are not used ( i.e. satellite
receiver, video recorder), they must be initialized after
reset according to the tables Volume Loudspeaker
Channel shown above and Volume Headphone Chan-
nel on page 28.
Balance Loudspeaker Channel
Balance loudspeaker
channel [L/R]
Left muted, Right 100%
Left 0.8%, Right 100%
Left 99.2%, Right 100%
Left 100%, Right 100%
Left 100%, Right 99.2%
Left 100%, Right 0.8%
Left 100%, Right muted
0001hex
0111 1111
0111 1110
0000 0001
0000 0000
RESET
1111 1111
1000 0010
1000 0001
H
7Fhex
7Ehex
01hex
00hex
FFhex
82hex
81hex
Positive balance settings reduce the left channel without
affecting the right channel, negative settings reduce the
right channel leaving the left channel at 100%. A step by
1 LSB decreases or increases the balance by about
0.8% (exact figure: 100/127).
Bass Loudspeaker Channel
Bass loudspeaker
channel
+12 dB
+11 dB
+1 dB
0 dB
–1 dB
–11 dB
–12 dB
0002hex
0110 0000
0101 1000
0000 1000
0000 0000
RESET
1111 1000
1010 1000
1010 0000
H
60hex
58hex
08hex
00hex
F8hex
A8hex
A0hex
With positive bass settings internal overflow may occur
even with overall volume less than 0 dB. This will lead to
a clipped output signal. Therefore, it is not recom-
mended to set bass to a value that, in conjunction with
volume, would result in an overall positive gain.
ITT Semiconductors
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MSP 3410 B
PRELIMINARY DATA SHEET
Treble Loudspeaker Channel
Treble loudspeaker
channel
+12 dB
+11 dB
0003hex
0110 0000
0101 1000
+1 dB
0 dB
–1 dB
0000 1000
0000 0000
RESET
1111 1000
–11 dB
–12 dB
1010 1000
1010 0000
H
60hex
58hex
08hex
00hex
F8hex
A8hex
A0hex
With positive treble settings internal overflow may occur
even with overall volume less than 0 dB. This will lead to
a clipped output signal. Therefore it is not recommended
to set treble to a value that in conjunction with volume
would result in a overall positive gain.
Loudness Loudspeaker Channel
Loudness
loudspeaker channel
+17 dB
+16 dB
0004hex
0100 0100
0100 0000
+1 dB
0 dB
0000 0100
0000 0000
RESET
H
44hex
40hex
04hex
00hex
Loudness increases the volume of low and high fre-
quency signals while keeping the amplitude of the 1 kHz
reference frequency constant. The intended loudness
has to be set according to the actual volume setting. Be-
cause loudness introduces gain, it is not recommended
to set loudness to a value that in conjunction with volume
would result in a overall positive gain.
Mode Loudness
Normal (constant vol-
ume at 1 kHz)
Super Bass (constant
volume at 2 kHz)
00004hex
0000 0000
Reset
0000 0100
L
00hex
04hex
By means of ‘Mode Loudness’, the corner frequency for
bass amplification can be set to two different values. In
Super Bass mode, the corner frequency is shifted up.
The point of constant volume is shifted from 1 kHz to
2 kHz.
28
Spatial Effects Loudspeaker Channel
Spatial effect loud-
speaker channel
OFF
Stereo Basewidth En-
largement (SBE) or
Pseudo Stereo Effect
(PSE)
0005hex
0000 0000
RESET
0011 1111
H
00hex
3Fhex
The kind of spatial effect depends on the source mode.
If the incoming signal is in mono mode, Pseudo Stereo
Effect is active, for stereo signals Stereo Basewidth En-
largement is effective.
Volume Headphone Channel
Volume Headphone
Channel
+12 dB
+11 dB
+1 dB
0 dB
–1 dB
–77 dB
Mute
0000hex
H
0111 1111
0111 1111
7Fhex
7Ehex
0111 0100
0111 0011
0111 0010
74hex
73hex
72hex
0010 0110 26hex
0000 0000... 0 –
0010 0101 25hex
Volume SCART Channel
Volume SCART
channel
OFF
0 dB gain (digital full
scale (FS) to 2 VRMS
output)
+6 dB gain (–6 dBFS
to 2 VRMS output)
0007hex
00hex
RESET
40hex
7Fhex
H
The highest positive 8 bit number yields in a maximum
possible gain of 12 dB. Decreasing the volume register
by 1 LSB decreases volume by 1 dB. The minimum vol-
ume is –77 dB. Lower volume settings mute the output.
With large scale input signals, positive volume settings
may lead to signal clipping.
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PRELIMINARY DATA SHEET
MSP 3410 B
Channel Source Modes
Loudspeaker channel
source
Headphone channel
source
SCART channel
source
I2S channel source
Quasi-peak detector
source
FM
NICAM1)
SCART
SBUS12
SBUS34
I2S
0008hex
0009hex
000ahex
000bhex
000chex
0000 0000
RESET
0000 0001
0000 0010
0000 0011
0000 0100
0000 0101
H
H
H
H
H
00hex
01hex
02hex
03hex
04hex
05hex
1) NICAM only possible if adaptive Deemphasis = off
Channel Matrix Modes (see also Table 4–1)
Loudspeaker channel
matrix
Headphone channel
matrix
SCART channel ma-
trix
I2S channel matrix
SOUNDA
SOUNDB
STEREO
0008hex
0009hex
000ahex
000bhex
0000 0000
RESET
0001 0000
0010 0000
L
L
L
L
00hex
10hex
20hex
SCART Prescale
Volume Prescale
SCART
OFF
0 dB gain (2 VRMS in-
put to digital full scale)
+14 dB gain
(400 mVRMS input to
digital full scale)
000dhex
00hex
RESET
19hex
7Fhex
FM Prescale
Volume Prescale FM
(normal FM mode)
OFF
Maximum Volume
(28 kHz deviation 1)
recommended FIR-
bandwidth: 130 kHz)
Deviation 50 kHz1)
recommended FIR-
bandwidth: 200 kHz
Deviation 75 kHz1)
recommended FIR-
bandwidth: 200 or
280 kHz
Deviation 150 kHz1)
recommended FIR-
bandwidth: 380 kHz
Maximum deviation
192 kHz1)
recommended FIR-
bandwidth: 380 kHz
Prescale for adaptive
deemphasis WP1
recommended FIR-
bandwidth: 130 kHz
000ehex
00hex
RESET
7Fhex
48hex
30hex
18hex
13hex
10hex
H
H
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29


MSP3410B Datasheet PDF
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MSP 3410 B
PRELIMINARY DATA SHEET
Volume Prescale FM
(High Deviation
Mode)
Deviation 150 kHz1)
recommended FIR-
bandwidth: 380 kHz
Maximum deviation
384 kHz1)
recommended FIR-
bandwidth: 500 kHz
000ehex
0011 0000
0001 0011
H
30hex
13hex
For the High Deviation Mode, the FM prescaling values
can be used in the range between 13hex to 30hex. Please
consider the internal reduction of 6 dB for this mode. The
FIR-bandwidth should be selected to 500 kHz.
1) Given deviations will result in internal digital full scale
signals. Appropriate clipping headroom has to be set by
the customer. This can be done by decreasing the listed
values by a specific factor.
FM Matrix Modes (see also Table 4–1)
FM matrix
NO MATRIX
GSTEREO
KSTEREO
000ehex
0000 0000
RESET
0000 0001
0000 0010
L
00hex
01hex
02hex
NO_MATRIX is used for terrestrial mono or satellite ste-
reo sound. GSTEREO dematrixes (L+R, 2R) to (2L, 2R)
and is used for German dual carrier stereo system
(Standard B/G). KSTEREO dematrixes (L+R, L–R) to
(2L, 2R) and is used for the Korean dual carrier stereo
system (Standard M).
FM Fixed Deemphasis
Deemphasis FM
50 µs
75 µs
J17
OFF
000fhex
0000 0000
RESET
0000 0001
0000 0100
0011 1111
H
00hex
01hex
04hex
3Fhex
FM Adaptive Deemphasis
Adaptive
Deemphasis FM
OFF
WP1
000fhex
0000 0000
RESET
0011 1111
L
00hex
3Fhex
Must be set to ’OFF’ in case of NICAM or dual carrier ste-
reo (German or Korean). If ’ON’ FM fixed deemphasis
must be set to 75 µs and FM matrix mode must be set
to ’NO MATRIX’.
NICAM Prescale
Volume Prescale
NICAM
OFF
0 dB gain
+12 dB gain
0010hex
00hex
RESET
20hex
7Fhex
H
NICAM Deemphasis
(not yet switchable, see note in section 12.1.)
Deemphasis NICAM
J17
OFF
0011hex
0000 0000
RESET
0011 1111
H
00hex
3Fhex
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