Philips Q548.1E, Руководство по обслуживанию

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Circuit Descriptions EN 43 Q548.1E LA 7.
2009-Apr-03
7.6 Video and Audio Processing - PNX8543
The PNX8543 is the main audio and video processor (or
System-on-Chip) for this platform. It is a member of the
PNX85xx SoC family (described in earlier chassis) with the
addition of the MPEG4 functionality; the separate STi710x
MPEG4 decoder is no longer implemented in this platform.
The PNX8543 handles the digital and analogue audio- and
video decoding and processing. The processor is a MIPS32
general purpose CPU and a 8051-based TV controller for
power management and user event handling.
• For a functional diagram of the PNX8543, refer
to
Figure 7-9 .
Figure 7-9 PNX8543 functional diagram
1 8 440_202_090226.ep s
090226
T S o u t/in for
T S in from
CVB S , Y/C,
LVD S for
a n a log CVB S
a n a log au dio
I
2
S
D ua l S PDIF
Low-IF
SS IF, LR
D ua l HDMI
S PDIF
CI/CA
MPEG
PRIMARY
LVD S
VIDEO
S ECONDARY
MEMORY
VIDEO
3 D COMB
DIGITAL IF
AUDIO DEMOD
AUDIO IN
HDMI
S CALER,
AUDIO D S P
AUDIO DAC S
AUDIO OUT
3 00 MHz
3 00 MHz
I
2
C PWM GPIO IR ADC UART I
2
C GPIO Fl as h
S Y S TEM
U S B 2.0 CA
PNX 8 54 3 x
DV INPUT DV-ITU-656
AV-PIP
S PI
MPEG/H.264
I
2
S
RECEIVER
( 8 051)
CONTROLLER
AND DECODE
DECODER
ch a nnel decoder
PCMCIA
RGB
PROCE SS OR
S Y S TEM
CONTROLLER
DECODER
VIDEO
CPU
MIP S3 2 4KEc
0 1 x 2 2 x
AV-D S P
REDUCTION
AND NOI S E
DE-INTERLACE
OUTPUT
VIDEO
S UB-PICTURE
ENCODER
OUTPUT
VIDEO
ch a nnel)
( s ingle or d ua l
fl a t p a nel di s pl a y
DRAWING
ENGINE
DMA BLOCK
PCI 2.2