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參數(shù)資料
| 型號(hào)： | MSP34X5G |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | MSP 34x5G Multistandard Sound Processor Family |
| 中文描述： | 中型34x5G多標(biāo)準(zhǔn)聲音處理器系列 |
| 文件頁(yè)數(shù)： | 5/98頁(yè) |
| 文件大?。?/td> | 1541K |
| 代理商： | MSP34X5G |
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PRELIMINARY DATA SHEET
MSP 34x5G
Micronas
5
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
I
2
C 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 I
2
C 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.
Fig. 1–1:
Simplified functional block diagram of MSP 34x5G
S
Loud-
speaker
Sound
Processing
SCART1
SCART1
SCART2
MONO
De-
modulator
DAC
ADC
Loud-
speaker
DAC
ADC
Sound IF1
I
2
S
I
2
S1
I
2
S2
Pre-
processing
Prescale
Prescale
SCART
DSP
Input
Select
SCART
Output
Select
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