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ST18-AU1 Datasheet

  • ST18-AU1

  • SIX-CHANNEL DOLBY AC3/MPEG2 AUDIO DECODER

  • 495.34KB

  • 87頁

  • STMICROELECTRONICS   STMICROELECTRONICS

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ST18-AU1
SIX-CHANNEL DOLBY AC3/MPEG2 AUDIO DECODER
PRELIMINARY DATA
FEATURES
s
Single chip multi-function audio decoder able to
decompress DOLBY AC-3, MPEG-1 and
MPEG-2 audio streams.
Maximum 5.1 channel DOLBY AC-3 decoding
to 2 channel mixed down output with DOLBY
surround compatible or karaoke capable option.
Variable bit rate MPEG-1 layer II audio
decoding, and MPEG-2 multi-channel audio
decoding for karaoke capable application.
Input data rates
s
s
s
Interrupt
controller
DMA
controller
Emulation
unit and TAP
s
s
up to 448 Kbits/s for AC-3 decoder
up to 912 Kbits/s for MPEG-1 or MPEG-2
audio decoder
Clocks and
timers
D950
DSP
core
I
2
C Host
interface
24K Data
memory
16K Program
memory
s
Supports up to 8 channel DVD linear PCM input
at max rate of 6.144 Mbits/s down-mixing and/
or sub-sampling to 2 to 6 channels.
Accepts MPEG-1 or DVD/MPEG-2 PES input
packets.
Programmable D950 core
System
time
clock
provides
A/V
synchronization and PTS packet extraction.
Automatic error concealment on CRC or
synchronization error.
6 channel PCM audio output at 16/18/20/24 bit.
Sampling rate of 32/44.1/48/96 kHz.
Two on-chip PLLs providing full circuit operation
with only one external 27 MHz clock.
I
2
C interface for host control
Multi-format i
2
S serial data input port and
decoded audio PCM output port.
IEC-958 (S/PDIF) formatter and transmitter for
DOLBY AC-3, MPEG audio bit stream, or audio
PCM.
Dedicated hardware for emulation and test,
IEEE 1149.1 (JTAG).
3.3V power supply, I/O鈥檚 5V tolerant, 0.35碌M
HCMOS6 technology.
160 pin PQFP package
s
Bus switch
unit
s
s
s
2
Input serial
interface
IEC-958
(S/PDIF)
output
3
Output serial
interface
s
s
s
s
APPLICATIONS
s
s
s
s
Digital video disc (DVD) player
Digital TV (DBS/DVB) receiver
PC multimedia
Consumer digital audio
s
s
s
s
February 98
42 1726 00
This is preliminary information on a product in development or undergoing evaluation. Details are subject to change without notice.

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