Sony HCD-V4800 Service Manual page 30

VIDEO BOARD IC901 µPD780016YGF-012-3BA (IIC INTERFACE CONTROLLER)
Pin No. Pin Name
1 to 8 P80 to P87
9 TEST
10 X2
11 X1
12 VDD
13 XT2
14 XT1
15 RESET
16 P00
17 P01
18 QINT
19 to 22 P03 to P06
23 VDD
24 AVDD
25 to 32 P10 to P17
33 AVSS
34 CMD0
35 CMD1
36 CMD2
37 CMD3
38 P24
39 P25
40 VSS
41 P26
42 P27
43 MREQ
44 SACK
45 CDGM
46 P93
47 MDATA
48 MCLK
49 OS-XLAT
50 G-XLAT
51 G-XRST
52 CD-XRST
53 CDPOW
54
DOUT
55 IIC-DATA
56 IIC-CLK
57 to 64 P40 to P47
65 NRON
66 LEVEL0
67 LEVEL1
I/O
I
Not used (fixed at "L")
I Test terminal (fixed at "L")
O
Main system clock output terminal (5 MHz)
I
Main system clock input terminal (5 MHz)
—
Power supply terminal (+5V)
O Sub system clock output terminal Not used (open)
I
Sub system clock input terminal Not used (fixed at "H")
I
Reset signal input from the master controller (IC301) "L": reset
I
Inputs the boundary point control (phase fix) for CXD1854Q (IC301) (fixed at "L")
I
Inputs the boundary point control (phase switch) for CXD1854Q (IC301) (fixed at "L")
I
Interrupt status input from the CD mechanism controller (IC701)
I
Inputs the boundary point control (phase 0 to 3) for CXD1854Q (IC301) (fixed at "L")
— Power supply terminal (+5V)
—
Power supply terminal (+5V) (for A/D conversion)
I
Not used (fixed at "L")
—
Ground terminal (for A/D conversion)
I/O
I/O
Two-way data bus with the mechanism controller (IC701)
I/O
I/O
I
Not used (fixed at "L")
I
Not used (fixed at "L")
—
Ground terminal
I Not used (fixed at "L")
I
Not used (fixed at "L")
O
Communication request signal output to the CD mechanism controller (IC701)
I
Data acknowledge input from the CD mechanism controller (IC701)
I Not used (fixed at "L")
I
Not used (fixed at "L")
O
Serial data output to the on screen display controller (IC271) and video noise reduction (IC301)
Serial data transfer clock signal output to the on screen display controller (IC271) and video
O
noise reduction (IC301)
O Serial data latch pulse output to the on screen display controller (IC271)
O
Serial data latch pulse output terminal Not used (open)
O
Reset signal output terminal Not used (open)
O
Reset signal output to the CD/video CD circuit "L": reset
O
Power on/off selection signal output terminal Not used (open)
O
Digital output terminal Not used (open)
Communication data bus with the master controller (IC301) and fluorescent indicator tube
I/O
driver (IC601)
Communication data reading clock signal input or transfer clock signal output with the master
I/O
controller (IC301) and fluorescent indicator tube driver (IC601)
I Not used (fixed at "L")
O
Video noise reduction system on/off selection signal output terminal Not used (open)
O
Level control signal output terminal Not used (open)
O
Level control signal output terminal Not used (open)
Function
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