MAS3559F 查看數據表（PDF） - Micronas

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MAS3559F

MPEG Layer 2/3, AAC Audio Decoder, G.729 Annex A Codec

Micronas 

MAS 35x9F

DATA SHEET

2. Functional Description

2.1. Overview

The MAS 35x9F is intended for use in portable con-

sumer audio applications. It receives parallel or serial

data streams and decodes MPEG Layer 2 and 3

(including the low sampling frequency extensions) and

MPEG 2 AAC. A low bit-rate speech codec, compliant

to the ITU Standard G.729 Annex A, is integrated.

Additional downloadable software modules (SDMI,

other audio/speech encoders/decoders) are available

on request.

2.2. Architecture of the MAS 35x9F

The hardware of the MAS 35x9F consists of a high-

performance RISC Digital Signal Processor (DSP),

and appropriate interfaces. A hardware overview of the

IC is shown in Fig. 2–1.

2.3. DSP Core

The internal processor is a dedicated DSP for

advanced audio applications.

Mic. Input

(incl. Bias)

1

Line Input

2

A/D

S/PDIF Input 1

S/PDIF Input 2

Serial Audio

(I2S, SDI)

Serial Audio

(stream, SDIB)

VBAT

Volt.

Mon.

V1

Div.

V2

Audio Codec

2

DSP Core

ALU MAC

Accumulators

ROM

D0

D1

Registers

Div.

MIX

Audio

Proc.

D/A

Audio

2 Output

Control

DCCF

DCFR

DSP

Codec

Serial

Audio

(I2S, SDO)

S/PDIF

Output

I2C

Interface

I2C

control

Parallel

I/O Bus

(PIO)

Xtal

18.432 MHz

Osc.

Fig. 2–1: The MAS 35x9F architecture

PLL

Synth.

Synthesizer

Clock

Scaler ÷2

8

June 30, 2004; 6251-505-1DS

CLKO

Micronas

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