STA014T View Datasheet(PDF) - STMicroelectronics

Part Name

Description

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STA014T

MPEG 2.5 LAYER III AUDIO DECODER WITH ADPCM AND SRS WOW® POSTPROCESSING CAPABILITY

STMicroelectronics 

STA014-STA014B-STA014T

1. OVERVIEW

1.1 - MP3 decoder engine

The MP3 decoder engine is able to decode any

Layer III compliant bitstream: MPEG1, MPEG2

and MPEG2.5 streams are supported. Besides

audio data decoding the MP3 engine also per-

forms ANCILLARY data extraction: these data

can be retrieved via I2C bus by the application

microcontroller in order to implement specific

functions.

Decoded audio data goes through a software vol-

ume control and a two-band equalizer blocks be-

fore feeding the output I2S interface. This results

in no need for an external audio processor.

MP3 bitstream is sent to the decoder using a sim-

ple serial input interface (see pins SDI, SCKR,

BIT_EN and DATA_REQ), supporting input rate

up to 20 Mbit/s. Received data are stored in a

256 bytes long input buffer which provides a

feedback line (see DATA_REQ pin) to the bit-

stream source (tipically an MCU).

1.2 - ADPCM encoder/decoder engine

This device also embeds a multistandard ADPCM

encoder/decoder supporting different sample

rates (from 8 KHz up to 32 KHz) and different

sample sizes (from 8 bit to 32 bits). During en-

coding process two different interfaces can be

used to feed data: the serial input interface (same

interface used also to feed MP3 bitstream) or the

ADC input interface, which provides a seamless

connection with an external A/D converter. The

currently used interface is selected via I2C bus.

Also to retrieve encoded data two different inter-

faces are available: the I2C bus or the faster

GPSO output interface. GPSO interface is able to

output data with a bitrate up to 5 Mbit/s and its

control pins (GPSO_SCKR, GPSO_DATA and

GPSO_REQ) can be configured in order to easily

fit the target application.

ABSOLUTE MAXIMUM RATINGS

Symbol

VDD

Vi

VO

Tstg

Toper

Parameter

Power Supply

Voltage on Input pins

Voltage on output pins

Storage Temperature

Operative ambient temp

Value

Unit

-0.3 to 4

V

-0.3 to VDD +0.3

V

-0.3 to VDD +0.3

V

-40 to +150

°C

-20 to +85

°C

THERMAL DATA

Symbol

Rth j-amb

Parameter

Thermal resistance Junction to Ambient

Value

85

Unit

°C/W

4/45

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