ICs functional description
9
. ICs functional description
UOC TDA93XX
SYMBOL PIN
DESCRIPTION
STAND BY output.
1
In STAND BY mode, high level (Power OFF).
For Power ON this pin will be reduced to low.
SCL 2
I
2
C-bus clock line
SDA 3
I
2
C-bus data line
TUNING
4
tuning Voltage (Vt) PWM output
P3.0/NTSC SW
5
Port 3.0 or NTSC output/SCART SW input, Forced NTSC selection,
Low-level output, otherwise High output.
KEY
6
Control keys input *3
VOL
7
Sound Volume control PWM output
MUTE
8
Sound mute output
VSSC/P
9
Digit ground for µ-controller core and periphery
BAND1
10
Tuner Band selection output
BAND2
11
Tuner Band selection output
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/EWD
20
Automatic volume leveling /EAST-WEST drive output
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/SIFIN1 *1
28
Audio deemphasis or SIF input
DECSDEM/SIFIN2 29
decoupling sound demodulator or SIF input 2
GND2 30
ground 2 for TV processor
SNDPLL/SIFAGC *1
31
narrow band PLL filter or AGC sound IF
AVL/SNDIF/REF0/
AMOUT *1
32
Automatic Volume Levelling / sound IF input / subcarrier reference output /
audio
deemphasis
HOUT 33
horizontal output
FBISO 34
flyback input/sandcastle output
24
