ST18-AU1 Datasheet, PDF (1/87 Pages) STMicroelectronics – SIX-CHANNEL DOLBY AC3/MPEG2 AUDIO DECODER

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.
s Maximum 5.1 channel DOLBY AC-3 decoding
to 2 channel mixed down output with DOLBY
surround compatible or karaoke capable option.
s Variable bit rate MPEG-1 layer II audio
decoding, and MPEG-2 multi-channel audio
decoding for karaoke capable application.
s Input data rates
s up to 448 Kbits/s for AC-3 decoder
s up to 912 Kbits/s for MPEG-1 or MPEG-2
audio decoder
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.
s Accepts MPEG-1 or DVD/MPEG-2 PES input
packets.
s Programmable D950 core
s System time clock provides A/V
synchronization and PTS packet extraction.
s Automatic error concealment on CRC or
synchronization error.
s 6 channel PCM audio output at 16/18/20/24 bit.
Sampling rate of 32/44.1/48/96 kHz.
s Two on-chip PLLs providing full circuit operation
with only one external 27 MHz clock.
s I²C interface for host control
s Multi-format i²S serial data input port and
decoded audio PCM output port.
s IEC-958 (S/PDIF) formatter and transmitter for
DOLBY AC-3, MPEG audio bit stream, or audio
PCM.
s Dedicated hardware for emulation and test,
IEEE 1149.1 (JTAG).
s 3.3V power supply, I/O’s 5V tolerant, 0.35µM
HCMOS6 technology.
s 160 pin PQFP package
Interrupt
controller
DMA
controller
Emulation
unit and TAP
Clocks and
timers
I²C Host
interface
D950
DSP
core
24K Data
memory
16K Program
memory
Bus switch
unit
2
Input serial
interface
IEC-958
(S/PDIF)
output
3
Output serial
interface
APPLICATIONS
s Digital video disc (DVD) player
s Digital TV (DBS/DVB) receiver
s PC multimedia
s Consumer digital audio
February 98
42 1726 00
This is preliminary information on a product in development or undergoing evaluation. Details are subject to change without notice.