Philips P&S 22HFL4372D/10 - Front-End Analogue and DVB-T, DVB-C; ISDB-T reception; HDMI; Video and Audio Processing - PNX85500

Circuit Descriptions
EN 41Q552.1HE LA 7.
2010-Nov-19
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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 7-7 HDMI input configuration
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).
18770_226_100127.eps
100426
+5V5-TUN
196 mA
+5V
+5V5-TUN +5V-TUN
2179 mA 196 mA
+12V +3V 3
+ 3V 3 +2V5
2919 mA 2371 mA 450 mA
+1V8
+1V8 +1V2
2450 mA 550 mA
+1V1
5100 mA
+1V1
dc-dc
+5V
dc-dc
+5V-TUN
s t abilizer
+ 3V 3
dc-dc
+2V5
s t abilizer
+1V8
dc-dc
+1V2
s t abilizer
18770_227_100127.eps
100426
+24V
+5V
+5V
+ 3V 3 tu ner
537.1 mA 777.4 mA 296 mA
+V-LNB +3V 3 tuner +2V5
400 mA 90 mA
+V-LNB LNB-RF1
+5V
+1V0
400 mA 1820 mA
+1V0
dc-dc
+ 3V 3
s t abilizer
+5V
dc-dc
down
converter
+2V5
s t abilizer
linear
s t abilizer
18770_235_100127.eps
100219
1
8770_243_100203.eps
100203