Philips 46PFL9704H/12, Service Manual

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Circuit Descriptions EN 46 Q549.3E LA 7.
2009-Aug-07
Figure 7-9 PNX8543 audio flow diagram
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.
1 8 440_204_090226.ep s
090226
VM S P
ADC
MCU
DDR2- S DRAM
PNX 8 54 3 x
HDMI_RX
CAI
S PDIF-IN
I
2
S
S PDIF
DigIF
A S DEC
(DEMODULATION
AND DECODING)
TM2270
(MPEG, AC- 3 , MP 3
DECODER)
S PDIF-OUT
AO
AI
APP - AUDIO D S P
(PO S T PROCE SS ING)
2
DAC
2
DAC
2
DAC
2
DAC
DMA B
U
S
I2 S -OUT- S D 3
I2 S -OUT- S D4
I2 S -OUT-W S
I2 S -OUT- S CK
I2 S -OUT-O S C
M a in L, R
HP L, R
S CART2 L, R
S CART1 L, R
HDMI
S PDIF-IN1
IF
SS IF
L, R
T S -IN
S PDIF-O u t
S PDIF-IN2
I2 S -OUT- S D1
I2 S -OUT- S D2
I2 S -IN- S D 3
I2 S -IN- S D4
I2 S -IN-W S
I2 S -IN- S CK
I2 S -IN-O S C
I2 S -IN- S D1
I2 S -IN- S D2
S PDIF
ADC
4
4
×
I2 S
4
4
×
I2 S
XB 3
XB4
from
XB4
f as t S PDIF
XB1
XB2
4
×
I2 S