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Circuit Descriptions, Abbreviation List, and IC Data Sheets
EN 149
Q523.1U LA
9.
The Control and compute subsystem consists of the main
processor, control peripherals and the memory system.
The MIPS 4KEc is a 32-bit MIPS RISC core. It has direct
access to connectivity peripherals to support system features
via PCI, I
2
C, UART or General Purpose I/O. A JTAG interface
provides processor software debug capabilities.
The Memory Control Unit (MCU) is a 32-bit DDR2 SDRAM
interface supporting DDR2-533 with an address range of 128
MB (max.).
The PCI/XIO interface supports PCI Rev2.2 and can be used
to access 8/16-bit external NAND-Flash memory.
The Conditional Access Interface supports direct control and
communication to the PC-Card attached to a PCMCIA
interface. The interface supports the DVB CI-CA and
CableCard specification.
9.7
Back-end
Refer to figure “Architecture of TV520 platform” earlier in this
chapter for details. Refer also to block diagrams B04, B05 and
B06.
Table 9-1 Back-End key component overview
9.7.1
HD sets @ 60 Hz
In HD sets (60 Hz), the output signal coming from the PNX85xx
is fed to the PACIFIC3 via a single LVDS connection; the
PACIFIC 3 also drives the AmbiLight units. The PACIFIC 3 also
generates the pulse-width modulated signal needed for the
“Dimming Backlight” feature, which ensures additional motion
sharpness. As some displays require an analog signal to switch
the LCD, a multiplexer is added to transform the pulse-width
modulated signal. An additional signal, coming from the
PNX85xx, makes the selection between analog and pulse-
width modulation, depending on which display is used.
Scanning Backlight displays require an analog signal, and all
other displays a pulse-width modulated.
Refer to figure “Block diagram display control HD sets 60 Hz”.
Figure 9-15 Block diagram display control HD sets 60 Hz
Specification
Processing
Picture
enhancement DFI panel
HD @ 60 Hz
Cyclone
Pacific
no
HD @ 120 Hz
fHD @ 60 Hz
fHD @ 120 Hz
yes
H_16770_127.eps
130707
LV
D
S
41p -
F
I-
R
41S
-H
F
1M
5
9
1D
42
Pacific 3
SPI -flash
M25P05-AVMN6P
9322 206 45668
PNX85xx
M2
1S
01
PWM (Analog )
Dimming
MUX
+
Level
shift
LV
D
S
F
I-
W
E
31
P
-H
F
Debugging only !!
Select -AnaPWM Dimming
Converter
+
MUX
PWM
Dimming
PWM-Ambi
P87LPC764
BDH
MIPS
StdBy
PWM Boost
Converter
Analog Boost
LVDS
10b
LVDS
10b
JUM
PERS
LVDS
HD
AmbiLight
Scanning
Backlight
Display
Supply