Circuit Descriptions
EN 43Q548.1E 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
18440_202_090226.eps
090226
TS out/in for
TS in from
CVBS, Y/C,
LVDS for
analog CVBS
analog audio
I
2
S
Dual SPDIF
Low-IF
SSIF, LR
Dual HDMI
SPDIF
CI/CA
MPEG
PRIMARY
LVDS
VIDEO
SECONDARY
MEMORY
VIDEO
3D COMB
DIGITAL IF
AUDIO DEMOD
AUDIO IN
HDMI
SCALER,
AUDIO DSP
AUDIO DACS
AUDIO OUT
300 MHz
300 MHz
I
2
C
PWM
GPIO IR ADC UART I
2
C GPIO Flash
SYSTEM
USB 2.0 CA
PNX8543x
DV INPUT
DV-ITU-656
AV-PIP
SPI
MPEG/H.264
I
2
S
RECEIVER
(8051)
CONTROLLER
AND DECODE
DECODER
channel decoder
PCMCIA
RGB
PROCESSOR
SYSTEM
CONTROLLER
DECODER
VIDEO
CPU
MIPS32 4KEc
01 x22 x
AV-DSP
REDUCTION
AND NOISE
DE-INTERLACE
OUTPUT
VIDEO
SUB-PICTURE
ENCODER
OUTPUT
VIDEO
channel)
(single or dual
flat panel display
DRAWING
ENGINE
DMA BLOCK
PCI 2.2
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