(Ma-317 Board Ic160); System Control - System Control Peripheral Circuit Interface; System Control And Rf Modulator; System Control - Video/Rp Block Interface - Sony SLV-478 Service Manual

5-3. SYSTEM CONTROL — SYSTEM CONTROL PERIPHERAL CIRCUIT INTERFACE

(MA-317 board IC160)

Signal Pin No.
MA-317 Board
RESET
IC160 $£
MA-317 Board
I2C DATA1
IC160 @™
MA-317 Board
I2C CLOCK1
IC160 !¶
MA-317 Board
I2C DATA VIDEO
IC160 %™
MA-317 Board
I2C CLOCK VIDEO
IC160 %¡
MA-317 Board
(RP) S OUT1
IC160 ^∞
MA-317 Board
(RP) S CLK1
IC160 ^¶
5-4. SYSTEM CONTROL AND RF MODULATOR — INPUT SELECTION BLOCK
INTERFACE (MA-317 board IC160)
Signal Pin No.
MA-317 Board
ANT SEL
IC160 @¡
5-5. SYSTEM CONTROL — VIDEO/RP BLOCK INTERFACE (MA-317 board IC160)
Signal Pin No.
MA-317 Board
RF SWP
IC160 !•
MA-317 Board
QVD
IC160 !£
MA-317 Board
REC P
IC160 $ª
MA-317 Board
C SYNC
IC160 *¢
*1. Synchronized with drum rocation. 30Hz 50% duty pulse.
*2. Normal "L". "H" when video signal is not rgenerated.
*3. Composite sync signal (positive).
5-6. SYSTEM CONTROL — AUDIO BLOCK INTERFACE (MA-317 board IC160)
Signal Pin No.
MA-317 Board
A MUTE
IC160 $•
I/O
I Normally "H". "L" when service interruption detected or restored.
Serial communication data to audio microprocessor and
I/O
EEPROM I2C161.
Serial communication clock to audio microprocessor and
O
EEPROM I2C161.
I/O Serial communication data to video microprocessor.
O Serial communication clock to video microprocessor.
I/O Serial communication data to RP microprocessor.
O Serial communication clock to RP microprocessor.
I/O
O "L" when RF modulator through.
STOP/FF TAPE
I/O
/REW LOADING
O *1 *1
O L L
O L L
I *3 *3
STOP/FF TAPE
I/O
/REW LOADING
O L L
I/O level
I/O level
TAPE
PB REC
UNLOADING
*1 *1 *1
L *2 L
L L L
*3 *3 *3
TAPE
PB REC
UNLOADING
L L L
5-2
REC
PAUSE
*1
L
H
*3
REC
PAUSE
H