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PDF MSP3465G Data sheet ( Hoja de datos )
| Número de pieza | MSP3465G | |
| Descripción | Multistandard Sound Processor Family | |
| Fabricantes | Micronas | |
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MICRONAS
PRELIMINARY DATA SHEET
MSP 34x5G
Multistandard
Sound Processor Family
Edition March 5, 2001
6251-480-3PD
MICRONAS
1 page  
PRELIMINARY DATA SHEET
MSP 34x5G
Multistandard Sound Processor Family
Release Note: Revision bars indicate significant
changes to the previous edition. The hardware and
software description in this document is valid for
the MSP 34x5G version B8 and following versions.
1. Introduction
The MSP 34x5G family of single-chip Multistandard
Sound Processors covers the sound processing of all
analog TV standards worldwide, as well as the NICAM
digital sound standards. The full TV sound processing,
starting with analog sound IF signal-in, down to pro-
cessed analog AF-out, is performed in a single chip.
Figure 1–1 shows a simplified functional block diagram
of the MSP 34x5G.
These TV sound processing ICs include versions for
processing the multichannel television sound (MTS)
signal conforming to the standard recommended by
the Broadcast Television Systems Committee (BTSC).
The DBX noise reduction, or alternatively, Micronas
Noise Reduction (MNR) is performed alignment free.
Other processed standards are the Japanese FM-FM
multiplex standard (EIA-J) and the FM-Stereo-Radio
standard.
Current ICs have to perform adjustment procedures in
order to achieve good stereo separation for BTSC and
EIA-J. The MSP 34x5G has optimum stereo perfor-
mance without any adjustments.
All MSP 34xxG versions are pin compatible to the
MSP 34xxD. Only minor modifications are necessary
to adapt a MSP 34xxD controlling software to the
MSP 34xxG. The MSP 34x5G further simplifies con-
trolling software. Standard selection requires a single
I2C transmission only.
Note: The MSP 34x5G version has reduced control
registers and less functional pins. The remaining regis-
ters are software-compatible to the MSP 34x0G. The
pinning is compatible to the MSP 34x0G.
The MSP 34x5G has built-in automatic functions: The
IC is able to detect the actual sound standard automat-
ically (Automatic Standard Detection). Furthermore,
pilot levels and identification signals can be evaluated
internally with subsequent switching between mono/
stereo/bilingual; no I2C interaction is necessary (Auto-
matic Sound Selection).
The MSP 34x5G can handle very high FM deviations
even in conjunction with NICAM processing. This is
especially important for the introduction of NICAM in
China.
The ICs are produced in submicron CMOS technology.
The MSP 34x5G is available in the following packages:
PSDIP64, PSDIP52, PMQFP44, PLQFP64, and
PQFP80.
Sound IF1
I2S1
I2S2
SCART1
SCART2
MONO
ADC
De-
modulator
Pre-
processing
Prescale
SCART
DSP
Input
Select
ADC
Prescale
Loud-
speaker
Sound
Processing
DAC
DAC
SCART
Output
Select
Loud-
speaker
I2S
SCART1
Fig. 1–1: Simplified functional block diagram of MSP 34x5G
Micronas
5
5 Page 
PRELIMINARY DATA SHEET
MSP 34x5G
Table 2–1: Performed actions of the Automatic Sound Selection
Selected TV Sound Standard
B/G-FM, D/K-FM, M-Korea,
and M-Japan
B/G-NICAM, L-NICAM, I-NICAM,
D/K-NICAM
B/G-FM, B/G-NICAM
or
D/K1-FM, D/K2-FM, D/K3-FM,
and D/K-NICAM
BTSC-STEREO, FM Radio
M-BTSC-SAP
Performed Actions
Evaluation of the identification signal and automatic switching to mono, stereo, or bilingual. Preparing four
demodulator source channels according to Table 2–2.
Evaluation of NICAM-C-bits and automatic switching to mono, stereo, or bilingual. Preparing four
demodulator source channels according to Table 2–2.
In case of bad or no NICAM reception, the MSP switches automatically to FM/AM mono and switches
back to NICAM if possible. A hysteresis prevents periodical switching.
Automatic searching for stereo/bilingual-identification in case of mono transmission. Automatic and non-
audible changes between Dual-FM and FM-NICAM standards while listening to the basic FM-mono sound
carrier.
Example: If starting with B/G-FM-Stereo, there will be a periodical alternation to B/G-NICAM in the
absence of FM-Stereo/Bilingual or NICAM-identification. Once an identification is detected, the MSP
keeps the corresponding standard.
Evaluation of the pilot signal and automatic switching to mono or stereo. Preparing four demodulator
source channels according to Table 2–2. Detection of the SAP carrier.
In the absence of SAP, the MSP switches to BTSC-stereo if available. If SAP is detected, the MSP
switches automatically to SAP (see Table 2–2).
Table 2–2: Sound modes for the demodulator source channels with Automatic Sound Select
Source Channels in Automatic Sound Select Mode
Broadcasted
Sound
Standard
Selected
MSP Standard
Code3)
Broadcasted
Sound Mode
FM/AM
(source select: 0)
Stereo or A/B
(source select: 1)
Stereo or A
(source select: 3)
Stereo or B
(source select: 4)
M-Korea
B/G-FM
D/K-FM
M-Japan
02
03, 081)
04, 05, 07, 0B1)
30
MONO
STEREO
BILINGUAL:
Languages A and B
Mono
Stereo
Right = B
Mono
Stereo
Left = A
Right = B
Mono
Stereo
A
Mono
Stereo
B
B/G-NICAM
L-NICAM
I-NICAM
D/K-NICAM
D/K-NICAM
(with high
deviation FM)
08, 032)
09
0A
0B, 042), 052)
0C, 0D
NICAM not available or analog Mono
error rate too high
MONO
analog Mono
STEREO
analog Mono
BILINGUAL:
Languages A and B
analog Mono
analog Mono
analog Mono
analog Mono
NICAM Mono
NICAM Mono
NICAM Stereo
NICAM Stereo
Left = NICAM A NICAM A
Right = NICAM B
NICAM Mono
NICAM Stereo
NICAM B
20, 21
MONO
Mono
Mono
Mono
Mono
STEREO
Stereo
Stereo
Stereo
Stereo
20
MONO + SAP
Mono
Mono
Mono
Mono
BTSC
STEREO + SAP
Stereo
Stereo
Stereo
Stereo
21
MONO + SAP
Left = Mono
Left = Mono
Mono
SAP
Right = SAP
Right = SAP
STEREO + SAP
Left = Mono
Right = SAP
Left = Mono
Right = SAP
Mono
SAP
FM Radio
40
MONO
Mono
Mono
Mono
Mono
STEREO
Stereo
Stereo
Stereo
1) The Automatic Sound Select process will automatically switch to the mono compatible analog standard.
2) The Automatic Sound Select process will automatically switch to the mono compatible digital standard.
3) The MSP Standard Codes are defined in Table 3–7 on page 20.
Stereo
Micronas
11
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