MSP3438G datasheet(5/84 Pages) MICRONAS

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PRELIMINARY DATA SHEET

MSP 3438G

MICRONAS INTERMETALL

Multistandard Sound Processor Family

The hardware and software description in this docu-

ment is valid only for the MSP 3438G version A1.

All new versions of the MSP 3438G and all other men-

tioned members of the MSP 34x8G family will be real-

ized within the MSP 44x8G family with an extended

feature set. Please refer to the appropriate data sheet.

1. Introduction

The MSP 34x8G family of Multistandard Sound Pro-

cessors covers the sound processing of all analog TV-

Standards worldwide, as well as the NICAM digital

sound standards. The full TV sound processing, start-

ing with analog sound IF signal-in, down to processed

analog AF-out, is performed on a single chip. Figure

1–1 shows a simplified functional block diagram of the

MSP 34x8G.

The high-quality A/D and D/A converters offer the full

audio bandwidth of 20 kHz and the backend DSP pro-

cessing is performed at a 48 kHz sample rate.

The MSP 34x8G has been designed for the usage in

hybrid set-top boxes and multimedia applications. Its

asynchronous I2S slave interface allows the reception

of digital stereo signals with arbitrary sample rates

ranging from 5 to 50 kHz. Synchronization is per-

formed by means of an adaptive sample rate con-

verter.

The processed standards include the multichannel

television sound signal (MTS) which conforms to the

recommendations of the BTSC, as well as the Japa-

nese FM-FM multiplex standard (EIA-J). For these

standards, optimum stereo separation is achieved

without any adjustment. In addition, the MSP 34x8G is

also able to receive FM stereo radio and, in conjunc-

tion with the DRP 3510, ASTRA Digital Radio (ADR).

The DBX noise reduction is performed alignment-free.

The MSP 34x8G versions are pin and software com-

patible to other MSP families. Standard selection

requires only a single I2C transmission.

Several built-in automatic functions detect the actual

sound standard (Automatic Standard Detection) or

evaluate pilot levels and identification signals. Auto-

matic switching between mono/stereo/bilingual is per-

formed by the Automatic Sound Selection.

A status change indication signal makes polling of sta-

tus information unnecessary.

The ICs are produced in submicron CMOS technology

and are available in the following packages: PQFP80,

PLQFP64, PLCC68, and PSDIP64.

Fig. 1–1: Simplified functional block diagram of the MSP 34x8G

Loud-

SCART1

SCART2

SCART1

SCART2

SCART4

SCART3

MONO

De-

modulator

Aux

Headphone

I2S

Sound

Processing

speaker

Sound

Processing

DAC

ADC

Loud-

DAC

ADC

SCART

DSP

Input

Select

Pre-

processing

SCART

Output

Select

Prescale

I2S1

I2S2

Sound IF1

Sound IF2

speaker

/Modulator

I2S3

synchron.

I2S

asynchron.

I2S

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