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EN 48
7.
Q549.6E LA
TS-IN
SPDIF-IN1
SPDIF-IN2
I2S-IN-SD1
I2S-IN-SD2
I2S-IN-SD3
I2S-IN-SD4
I2S-IN-WS
I2S-IN-SCK
I2S-IN-OSC
HDMI
IF
SSIF
L, R
The Audio Subsystem consist of the following blocks:
•
Analogue Audio Front End (AAFE) used to capture
Baseband Audio Inputs and to sample Secondary Sound
IF (SSIF) directly or via Low-IF input
•
HDMI Receiver interface block
•
SPDIF input block
•
Audio Input (AI) block
•
Audio Output (AO) block
•
Demodulation & Decoding (ASDEC) DSP for decoding all
analogue terrestrial TV sound standards
•
Audio Post-Processing (APP) block
•
Digital Audio decoder.
7.5.3
Connectivity and Compute Subsystem
Refer to
Figure 7-10
for the connectivity and compute
subsystem.
2009-May-29
Circuit Descriptions
DDR2-SDRAM
PNX8543x
CAI
VMSP
XB1
SPDIF-IN
fast SPDIF
XB2
AI
4 × I 2 S
SPDIF
HDMI_RX
4
2
I
S
ADC
ASDEC
(DEMODULATION
DigIF
AND DECODING)
from
SPDIF
XB4
ADC
Figure 7-9 PNX8543 audio flow diagram
MCU
TM2270
(MPEG, AC-3, MP3
DECODER)
SPDIF-OUT
AO
4 × I 2 S
XB3
APP - AUDIO DSP
(POST PROCESSING)
XB4
SPDIF-Out
4 × I 2 S
I2S-OUT-SD1
4
I2S-OUT-SD2
I2S-OUT-SD3
I2S-OUT-SD4
I2S-OUT-WS
I2S-OUT-SCK
I2S-OUT-OSC
2
Main L, R
DAC
2
HP L, R
DAC
2
SCART2 L, R
DAC
2
SCART1 L, R
DAC
18440_204_090226.eps
090226
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