PRELIMINARY DATA SHEET
MSP 34x7G
Multistandard Sound Processor Family
EIA-J. The MSP 34x7G has optimum stereo perfor-
mance without any adjustments.
Release Note: Revision bars indicate significant
changes to the previous edition. The hardware and
software description in this document is valid for
the MSP 34x7G version B8 and following versions.
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 34x7G further simplifies con-
trolling software. Standard selection requires a single
I2C transmission only.
1. Introduction
The MSP 34x7G 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 34x7G.
Note: The MSP 34x7G 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 34x7G 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).
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.
The MSP 34x7G can handle very high FM deviations
even in conjunction with NICAM processing. This is
especially important for the introduction of NICAM in
China.
Other processed standards are the Japanese FM-FM
multiplex standard (EIA-J) and the FM-Stereo-Radio
standard.
The ICs are produced in submicron CMOS technology.
The MSP 34x7G is available in the following packages:
PSDIP52 and PMQFP44.
Current ICs have to perform adjustment procedures in
order to achieve good stereo separation for BTSC and
Loud-
speaker
Sound
De-
modulator
Pre-
processing
Loud-
speaker
Sound IF1
ADC
DAC
Processing
SCART1
DAC
SCART
DSP
Input
Select
ADC
Prescale
SCART
Output
Select
SCART1
MONO
Fig. 1–1: Simplified functional block diagram of MSP 34x7G
Micronas
5
MICRONAS [ MICRONAS ]
