ST18-AU1 STMICROELECTRONICS [STMicroelectronics], ST18-AU1 Datasheet - Page 12

• Manufacturer Part Number: ST18-AU1
• Description: SIX-CHANNEL DOLBY AC3/MPEG2 AUDIO DECODER
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

ST18-AU1
3
A functional block diagram of the ST18-AU1 is shown in Figure 3.1. The modules that
comprise the ST18-AU1 are outlined below and more detailed information is given in the
following chapters of this datasheet. The interconnection of these blocks and all external
interfaces are shown in the block diagram in Figure 3.2.
Figure 3.1
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Commands
status
Clock
inputs
Data
input
FUNCTIONAL OVERVIEW
Functional block diagram
interface
interface
Packet
demux
Timer
Serial
Host
manager
System
Linear PCM
Dolby AC-3
processor
decoder
decoder
MPEG2
Delay
(or Karaoke
(surround)
Down mix
modes)
formatter
S/PDIF
output
Serial
S/PDIF
output
(AC-3/MPEG
or 2 ch PCM)
2 to 6 channel
PCM output