Circuit Descriptions
7.
•
AVDD 1V2,from the power supply for the scaler IC
MT5301B
•
+1V2, supply voltage for power supply for the scaler IC
MT5301B
•
DDRV (+1.8V) supply voltage for DDR2
•
V3.3 V1.2 supply voltage for DEMOD
•
+5V-TUN, supply voltage for tuner
•
+5V-USB, input intermediate supply voltage for USB
•
AVDD3V3 from the power supply for the scaler IC
MT5301B
Figures gives a graphical representation of the DC/DC
converters with its current consumptions:
Figure 7-3 DC/DC converters xxPFL3007 series
7.4
Front-End Analogue and reception
7.4.1
Front-End Analogue
The Front-End for the analogue tuner consist of the following
key components:
•
F86WT-2-E
•
MT5301BCMU
Below find a block diagram of the front-end application for
analogue.
Figure 7-4 Front-End analogue block diagram
7.5
HDMI
In this platform, the TMDS361B HDMI multiplexer is
implemented. It supports up to 3 HDMI ports to be switched to
a single SOC. In this chassis 3HDMI ports are implemented.
Refer to figure
for the application.
Figure 7-5 HDMI input configuration
The TMDS361B has the following specifications:
•
3.3 V Power supply
•
Designed for signal rates up to 3 Gbps
•
Supports HDMI 1.3a specification
•
Adaptive equalization on inputs to support up to 20 meter
HDMI cables at 2.25 Gbps for 1080p 12-bit colour depth
•
TMDS input Clock-Detect circuit
•
DDC repeater function
•
<2 mW low power mode
•
Local I
2
C or GPIO configurable, in this application the
default I
2
C addresses is: 0x58.
7.6
Video and Audio Processing - MT5301B
The MT5301B is the main audio and video processor (or
System-on-Chip) for this platform. It has the following features:
•
Worldwide multi-standard analog TV demodulator
•
A transport demultiplexer
•
A multi-standard video decoder
•
An AC3/MPEG2 Audio decoder
•
HDMI 1.3 receiver (Cover HDMI 1.4 partial specification)
•
Audio codec
•
TCON
•
Panel overdrive control
•
Local dimming.
The MediaTek MT5301B family is a back-end decoder and a
TV controller and offers high integration for advanced
applications.It combines a transport de-multiplexer, a high
definition video decoder, an AC3 audio decoder, a dual-link
LVDS/mini-LVDS transmitter, and an NTSC/PAL/SECAM TV
decoder with a 3D comb filter (NTSC/PAL). The MT5301B
enables consumer electronics manufactures to build high
quality, low cost and feature-rich DTV. Supports FULL-HD
MPEG1/2/4/DivX/VC1/RM/H.264/AVS video decoder
standards, and JPEG. The MT5301B also supports MediaTek
MDDi™ de-interlace solution can reach very smooth picture
quality for motions. A 3D comb filter added to the TV decoder
recovers great details for still pictures. The special color
processing technology provides natural, deep color and true
studio quality video.
For a functional diagram of the MT5301B, see
.
19240_203_120224.eps
120224
19320_203_120601.eps
120601
I
2
C
I
2
C
IF AGC
RF AGC
IF
TCL
F86WT-2-E
MT5301B
19320_204_120601.eps
120604
HDMI 1
HDMI 2
HDMI 3
(optional)
MT5301B
TMDS
361B
