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EN 34
7.
RAM1.0L LA
7.3
MT8222 Video/Audio processor
Refer to figure
Figure 7-4
platform.
Debug PORT
TX
RX
USB DM
USB
USB DP
Data Bus 1
HDMI1
HDMI DDC I2C
OPWR0 5V H1
Data Bus 2
HDMI2
HDMI DDC I2C
OPWR0 5V H2
RGB & H/V SY NC
VGA Input
2
VGA I
C
VGA Audio Input
VGA L/R IN
o o
AV1 IN
o
o
SY 1 IN
AV1 Input
SC1 IN
AV1 L/R IN
Y 1 IN
PB1 IN
PR1 IN
CVI-1 Input
Y PBPR1 L/R IN
Y 2 IN
PB2 IN
PR2 IN
CVI-2 Input
Y PBPR2 L/R IN
Line OUT
LINE OUT R/L
Tuner SCL/SDA
AGC Tuner
Tuner
IF Tuner
VIF(K3953M)
SAW1
SIF(M3970M)
SAW2
7.3.1
Signal paths
RGB
Analogue RGB signals are transferred by the MT8222 to a
digital signal by the internal A/D converter. The MT8222
generates an LVDS signal to the TL2428 on-chip TCON which
drives the LCD display.
HDMI
HDMI signals are further processed digitally by the MT8222.
The MT8222 generates an LVDS signal to the TL2428 on-chip
TCON which drives the LCD display.
Component Input
Component signals are processed by the MT8222. The
MT8222 generates an LVDS signal to the TL2428 on-chip
TCON which drives the LCD display.
Audio is separately processed by the MT8222 and further
processed by the CS4344 and then the audio amplifier.
RF Input
RF input signals are demodulated by the TDA9885 IF
demodulator and further processed by the MT8222. The signal
is then split into an video and an audio part.
2010-Jul-02
Circuit Descriptions
for the power architecture of this
EEPROM
AT24C02
U15
EEPROM
AT24C02
U16
VGA EDID
2
Channel 3
VGA I
C
EEPROM
U6
Channel Switch
74HC4052PW
Channel 2
Scaler UART
U7
2
T-CON I
C
Channel 1
AL2 & AR2 OUT
DRV602PWR
U26
TCVBS-N&P
TDA9885TSV5
U10
VIF
REF
Y 1
SIF
4 MHz
Figure 7-4 MT8222 Video/Audio system application
PRST#
DATA
LVDS
MT8222
U17
DATA
Y2
27MHz
I2S DAC
2
I
S
CS4344
U37
The video signal is further processed by the MT8222 which
generates an LVDS signal to the TL2428 on-chip TCON which
drives the LCD display.
The audio signal is further processed by the MT8222 and split
into two parts. One part drives the Stereo Line Driver "AUDIO
OUT" chain, the other part drives the CS4344 and the audio
amplifier.
Reset
Circuit
Flash
MX25L3205DM2I-12G
U19
TCON
T CON
LCD PANEL
TL2428MC
SIGNAL
U36
T-CON I
2
C
EEPROM
Y6
AT24C32CN-SH-T
CSTCE10M0G55
U29
10MHz
DDR
NT5TU32M16CG-25C
U22
IR_
ADIN 0
IR BD
ADIN 0
LED 2
Amp R+
DAC R
Amp R-
Audio Amp
TPA3101D2PHPR
DAC L
Amp L+
U23
Amp L-
19000_202_100629.eps
100629
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