MSP3457G datasheet(5/81 Pages) MICRONAS

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PRELIMINARY DATA SHEET

MSP 34x7G

Micronas

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 34x7G version B8 and following versions.

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.

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 34x7G 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 34x7G further simplifies con-

trolling software. Standard selection requires a single

I2C transmission only.

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).

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.

The ICs are produced in submicron CMOS technology.

The MSP 34x7G is available in the following packages:

PSDIP52 and PMQFP44.

Fig. 1–1: Simplified functional block diagram of MSP 34x7G

Loud-

SCART1

MONO

De-

modulator

speaker

Sound

Processing

DAC

ADC

Loud-

DAC

ADC

Sound IF1

speaker

Pre-

processing

Prescale

SCART

DSP

Input

Select

SCART

Output

Select

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