Circuit Descriptions
7.
Figure 7-4 DC/DC converters all other series
Figure 7-5 DC/DC converters DVB-S2 devices
7.4
Front-End Analogue and DVB-T, DVB-C;
ISDB-T reception
7.4.1
European/China region
The Front-End for the European/China region consist of the
following key components:
•
Hybrid Tuner
•
Switchable SAW filter 7/8 MHz (Eur.), or single SAW filter
(8 MHz) (China)
•
Bandpass filter
•
Amplifier
•
PNX85500 SoC TV processor with integrated DVB-T and
DVB-C channel decoder and analogue demodulator.
Below find a block diagram of the front-end application for this
region.
Figure 7-6 Front-End block diagram European/China region
7.5
HDMI
In this platform, the Silicon Image Sil9x87 HDMI multiplexer is
implemented. Refer to figure
for
the application.
Figure 7-7 HDMI input configuration
The following multiplexers can be used:
•
Sil9187A (does not support “Instaport” technology for fast
switching between input signals)
•
Sil9287B (supports “Instaport” technology for fast
switching between input signals).
The hardware default I
2
C addresses are:
•
Sil9187A: 0xB0/0xB2 (random: software workaround)
•
Sil9287B: 0xB2 (fixed).
The Sil9x87 has the following specifications:
•
+5V detection mechanism
•
Stable clock detection mechanism
•
Integrated EDID
•
RT control
•
HPD control
•
Sync detection
•
TMDS output control
•
CEC control
•
EDID stored in Sil9x87, therefore there are no EDID pins
on the SSB.
7.6
Video and Audio Processing - PNX85500
The PNX85500 is the main audio and video processor (or
System-on-Chip) for this platform. It has the following features:
•
Multi-standard digital video decoder (MPEG-2, H.264,
MPEG-4)
•
Integrated DVB-T/DVB-C channel decoder
•
Integrated CI+
•
Integrated motion accurate picture processing (MAPP2)
•
High definition ME/MC
•
2D LED backlight dimming option
•
Embedded HDMI HDCP keys
•
Extended colour gamut and colour booster
•
Integrated USB2.0 host controller
•
Improved MPEG artefact reduction compared with
PNX8543
•
Security for customers own code/settings (secure flash).
1
8
770_226_100127.ep
s
100426
+ 5V 5-T UN
196 m A
+ 5V
+ 5V 5-TUN
+ 5V -TUN
2179 m A
196 m A
+ 12V
+
3
V
3
+
3
V
3
+ 2V 5
2919 m A
2
3
71 m A
450 m A
+ 1V
8
+ 1V
8
+ 1V 2
2450 m A
550 m A
+ 1V 1
5100 m A
+ 1V 1
dc -dc
+ 5V
dc -dc
+ 5V -TUN
s
t
ab
iliz er
+
3
V
3
dc -dc
+ 2V 5
s
t
ab
iliz er
+ 1V
8
dc -dc
+ 1V 2
s
t
ab
iliz er
1
8
770_227_100127.ep
s
100426
+ 24V
+ 5V
+ 5V
+
3
V
3
t
u
ner
5
3
7.1 m A
777.4 m A
296 m A
+ V -LNB
+
3
V
3
t
u
ner
+ 2V 5
400 m A
90 m A
+ V -LNB
LNB -RF 1
+ 5V
+ 1V 0
400 m A
1
8
20 m A
+ 1V 0
dc -dc
+
3
V
3
s
t
ab
iliz er
+ 5V
dc -dc
down
c onverter
+ 2V 5
s
t
ab
iliz er
line
a
r
s
t
ab
iliz er
1
8
770_2
3
5_100127.ep
s
100219
1
8
770_24
3
_10020
3
.ep
s
10020
3
