ST18-AU1 STMICROELECTRONICS [STMicroelectronics], ST18-AU1 Datasheet - Page 13

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

Figure 3.2
Host interface
The I
processor. It receives operating commands, and returns host requested bitstream information
and internal status.
(I
2
C host interface)
2
(13 pins)
C serial bus interface operated in slave mode enables connection to an external host
CLKDIN
WSDIN
Clocks
DREQ
HSAS
HDA
HCL
IRQ
DIN
ST18-AU1 block diagram
ST18-AU1
Clocks and
Input serial
interfaces
controller
interface
Interrupt
timers
Host
2
PCM_OUT
Output serial
SCLKPCM
interfaces
IT
3
P0-7
WSPCM
D950
DSP
core
Y-bus
SPDIFOUT
(AC-3/MPEG or PCM)
MODE_RESET
controller
(S/PDIF)
LP
IEC-958
DMA
output
I-bus
X-bus
RESET
16K Program
16K X-data
Bus switch
8K Y-data
memory
memory
memory
TAP
unit
VCC
GND
9
IEEE 1149.1
JTAG interface
Direct X / bus
switch
(39 pins)
Direct I bus
(35 pins)
ST18-AU1
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