SAA2502 查看數據表（PDF） - Philips Electronics

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SAA2502

ISO/MPEG Audio Source Decoder

Philips Electronics 

Philips Semiconductors

ISO/MPEG Audio Source Decoder

Preliminary specification

SAA2502

1 FEATURES

• Low sampling frequency decoding possibilities (24 kHz,

22.05 kHz and 16 kHz) of MPEG2 are supported

• A variety of output formats are supported: I2S, SPDIF

and 256 or more times oversampled bit serial analog

stereo

• Automatic internal dynamic range compression

algorithm using programmable compression

parameters

• Non byte-aligned coded input data is handled

• Built-in provisions to generate high quality sampling

clocks for all six supported sampling frequencies; these

sampling clocks may locked to an external PLL to

support an extensive list of input data reference clock

frequencies

• Bit-rate and sampling-rate settings may be overruled by

the microcontroller while the SAA2502 is trying to

establish frame synchronization

• Input interface mode which requests data based on

input buffer content, enables the handling of variable

bit-rate input streams and input data offered in (fixed

length) bursts

• An interrupt output pin which can generate interrupt

requests at the occurrence of various events;

consequently polling by the microcontroller is not

needed in most situations

• L3 and the I2C-bus microcontroller interface protocols

are supported

• The control interface is always fully operational (also

while STOP is asserted)

• CRC protection of scale factors is provided for all

supported sample frequencies.

2 APPLICATIONS

• Astra Digital Radio (ADR)

• Digital Audio Broadcast (DAB)

• Digital Versatile Disc (DVD)

• Digital Video Broadcast (DVB)

• General purpose MPEG2 audio decoding.

3 GENERAL DESCRIPTION

The SAA2502 is a second generation ISO/MPEG audio

source decoder. The device specification has been

enhanced with respect to the SAA2500 and SAA2501 ICs

and therefore it offers in principle all features of its

predecessors.

It supports layer I and II of MPEG1 and the MPEG2

requirements for a stereo decoder.

4 ORDERING INFORMATION

TYPE NUMBER

SAA2502H

NAME

QFP44

PACKAGE

DESCRIPTION

plastic quad flat package; 44 leads (lead length 1.3 mm);

body 10 × 10 × 1.75 mm

VERSION

SOT307-2

1997 Nov 17

3

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