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Pin
Signal
number
name
56
VDDC
57
OSDGND
58
XTA/IN
59
XTA/OUT
60
RESET
61
VDDP
62
SCL(EEP)
63
SDA(EEP)
64
RC-In
Note 1 : Abbreviation of pin configulation mode :
Note 2 : During reset all pins are Quasi-Bidirectional mode.
Tuner and IF
The Tuner (U001)used on V3AR chassis is powered up by the 5V supply. It is IIC bus controlled and covers VHF, UHF,
CATV Band (Mid, super, and hyper).
The IF output from Tuner ( pin 11 of U001) is applied to the amplifier Q201.
For multi-system model with M-NTSC, switchable saw filter is used. Q001 at pin 2 of X003 servers to select the IF
signal between M/N mode to other modes ( e.g. B/G, D/K ) before demodulation is carried out at I001.
i.e. at M mode:
I001 (TDA9381/9386/9365) besides begin the microcontroller, incorperates video / chroma / deflections /
teletext features and video/audio switching. It performs auto color identification of PAL/SECAM/NTSC, sync
separation , AFC, HV oscillator and output RGB signals.
Configuration
I/O
mode
-
-
-
-
Input
-
Output
-
Input
-
-
-
I/O
O.D.
I/O
O.D.
Input
H.I.
Base of Q001
Digital supply to core (3.3V)
Oscillator ground supply
Crystal Oscillator input
Crystal Oscillator output
Reset
Digital supply to periphery (+3.3 V)
3.3V Clock of secondary I
3.3V
Data of secondary I
3.3V
Input for Remote control decoding
O.D.
Q.B.
H.I.
P.P.
High
- 8 -
Function
2
C-bus for EEPROM
2
C-bus for EEPROM
Open Drain
Quasi-Bidirectional
High-Impedance
Push-Pull
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