sta014t STMicroelectronics, sta014t Datasheet - Page 4

• Manufacturer Part Number: sta014t
• Description: Mpeg 2.5 Layer Iii Audio Decoder With Adpcm And Srs Wowo Postprocessing Capability
• Manufacturer: 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
ABSOLUTE MAXIMUM RATINGS
THERMAL DATA
4/45
Symbol
Symbol
R
T
th j-amb
V
T
V
V
oper
DD
stg
O
i
Power Supply
Voltage on Input pins
Voltage on output pins
Storage Temperature
Operative ambient temp
Thermal resistance Junction to Ambient
Parameter
Parameter
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.
-0.3 to V
-0.3 to V
-40 to +150
-20 to +85
-0.3 to 4
Value
Value
85
DD
DD
+0.3
+0.3
°C/W
Unit
Unit
°C
°C
V
V
V