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STA014 Datasheet(PDF) 4 Page - STMicroelectronics

Part No. STA014
Description  MPEG 2.5 LAYER III AUDIO DECODER WITH ADPCM AND SRS WOWO POSTPROCESSING CAPABILITY
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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STA014 Datasheet(HTML) 4 Page - STMicroelectronics

 
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THERMAL DATA
Symbol
Parameter
Value
Unit
Rth j-amb
Thermal resistance Junction to Ambient
85
°C/W
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
Parameter
Value
Unit
VDD
Power Supply
-0.3 to 4
V
Vi
Voltage on Input pins
-0.3 to VDD +0.3
V
VO
Voltage on output pins
-0.3 to VDD +0.3
V
Tstg
Storage Temperature
-40 to +150
°C
Toper
Operative ambient temp
-20 to +85
°C
STA014-STA014B-STA014T
4/45


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