Circuit Descriptions
7.
7.3
MT
8
222 Video/Audio processor
Refer to figure
for the power architecture of this
platform.
Figure 7-4 MT
8
222 Video/Audio system application
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.
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.
1
8
9
3
0_21
3
_100
3
10.ep
s
100
3
10
PR
S
T#
U19
MX25L
3
205DM2I-12G
NT5TU
3
2M16CG-25C
Amp R+
A
u
dio Amp
U2
3
TPA
3
101D2PHPR
U22
DATA
Amp L-
Amp L+
Amp R-
IR_
DATA
ADIN 0
TDA9
88
5T
S
V5
U10
Y 1
4 MHz
REF
LED 2
ADIN 0
AT24C
3
2CN-
S
H-T
EEPROM
U29
TCON
LVD
S
U
3
6
TL242
8
MC
VIF(K
3
95
3
M
3
0)
S
AW1
VIF
S
IF(K9650M
3
0)
S
AW2
S
IF
TCVB
S
-N&P
AT24C02
AT24C02
VGA EDID
EEPROM
D
a
t
a
B
us
2
D
a
t
a
B
us
1
OPWR0 5V H1
HDMI DDC I2C
T-CON I
2
C
HDMI DDC I2C
OPWR0 5V H2
U16
U15
U6
RGB & H/V
S
Y NC
o
o o
o
EEPROM
EEPROM
AV1 L/R IN
VGA L/R IN
VGA I
2
C
VGA I
2
C
S
C1 IN
S
Y 1 IN
AV1 IN
Y 1 IN
Y PBPR1 L/R IN
PR1 IN
PB1 IN
AL2 & AR2 OUT
MT
8
222
U17
T
u
ner
Line OUT
VGA A
u
dio Inp
u
t
AV1 Inp
u
t
CVI-1 Inp
u
t
VGA Inp
u
t
PB2 IN
Y 2 IN
Y PBPR2 L/R IN
PR2 IN
CVI-2 Inp
u
t
HDMI1
HDMI2
U
S
B
DRV602PWR
U26
LINE OUT R/L
C
S
4
3
44
U
3
7
I2
S
DAC
IF T
u
ner
AGC T
u
ner
T
u
ner
S
CL/
S
DA
U7
Ch
a
nnel
S
witch
74HC4052PW
Ch
a
nnel 2
Ch
a
nnel
3
Ch
a
nnel 1
U
S
B DM
De
bu
g PORT
RX
TX
U
S
B DP
Y2
27MHz
KE
Y B
D
Re
s
et
Circ
u
it
LCD PANEL
T CON
S
IGNAL
DDR
Fl
as
h
Y6
C
S
TCE10M0G55
IR BD
I
2
S
10MHz
DAC L
DAC R
T-CON I
2
C
S
c
a
ler UART
