14
10 .Principle ICS
A. ICs functional description
TDA93XX
Function:
TV signal processor with embedded
μ
-Controller
SYMBOL
PIN
DESCRIPTION
P1.3
1
3 Wires serial bus chip select, active high
SCL
2
I
2
C-bus clock line
SDA
3
I
2
C-bus data line
P2.0 4
Audio
mute
SCART_DET
5
SCART SW input, active high
KEY
6
Control keys input *3
P3.2
7
Panel power supply control, active high
P3.3
8
Standby output, active high
VSSC/P
9
Digit ground for µ-controller core and periphery
P0.5
10
Red LED input
P0.6
11
Blue LED input
VSSA
12
Analog ground of teletext decoder and digital ground of
TV-processor
SECPLL
13
SECAM PLL decoupling
VP2
14
2
nd
supply voltage TV-pro8V)
DECDIG
15
decoupling digital supply of TV-processor
PH2LF
16
Phase-2 filter
PH1LF
17
Phase-1 filter
GND3
18
Ground 3 for TV-processor
DECBG
19
Band gap decoupling
AVL
20
Automatic volume leveling
VDRB
21
Vertical drive B output
VDRA
22
Vertical drive A output
IFIN1
23
IF input 1
IFIN2
24
IF input 2
IREF
25
Reference current input
VSC
26
Vertical sawtooth capacitor
TUNER AGC
27
Tuner AGC output
AUDEEM
28
Audio deemphasis
DECSDEM
29
Decoupling sound demodulator or SIF input 2
GND2
30
Ground 2 for TV processor
SNDPLL
31
Narrow band PLL filter
REF0
32
Subcarrier reference output
HOUT
33
Horizontal output
FBISO
34
flyback input/sandcastle output
Summary of Contents for H-LCD2004
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