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2.4.5 MAIN CPU PIN FUNCTION
Pin
Pin name
I/O
1
VHOLD1
I
Data slice for main screen closed caption
2
HFLT1
I/O LPF for main screen closed caption video input
3
NC
O
Not used
4
NC
O
Not used
5
DIGR0
O
R [0] for OSD
6
TB1in
I
AC power for timer clock
7
REMO
I
Remote control
8
BYTE
I
Data bus width select [L = 16bit (fixed)]
9
CNVss
I
CPU programming mode select [Normal = L]
10
DIGG0
O
G [0] for OSD
11
DIGB0
O
B [0] for OSD
12
RESET
I
Reset for main CPU [Reset = L]
13
Xout
O
System clock osillation (crystal) : 16MHz
14
Vss
-
GND
15
Xin
I
System clock osillation (crystal) : 16MHz
16
VccI
I
3.3V stand-by power supply
17
OSC1
I
Clock for OSD
18
OSC2
O
Not used : Clock for OSD
19
INT1
I
AV COMPULINK control
20
INT0
I
Request for sub(chassis) CPU communication (serial data)
21
OUT1
O
Ys (blanking) for OSD
22
OUT2
O
YM (transparence) for OSD
23
NC
O
Not used
24
NC
O
Not used
25
NC
O
Not used
26
NC
O
Not used
27
CTA2/RTS2
O
Not used
28
CLK2
O
Not used
29
RxD2
I
Digital tuner control
30
TxD2
O
Digital tuner control
31
SDA2
I/O Not used
32
DIGR1
O
R [1] for OSD
33
DIGG1
O
G [1] for OSD
34
DIGB1
O
B [1] for OSD
35
TxD0
I
Data receive (serial) for external programming
36
RxD0
O
Data transmission (serial) for external programming
37
CLK0
I
Clock for external programming
38
RTS0
O
Busy for external programming [Operation = H]
39
P5.7
I
Not used
40
P5.6
O
Not used
41
HOLD
I
CPU programming mode select [Normal = H]
42
P5.4
O
Not used
43
P5.3
O
Not used
44
P5.2
O
Not used
45
P5.1
O
Not used
46
WR
O
CPU programming mode select [Normal = L]
47
P4.7
O
Data transmission for sub(chassis) CPU communication (serial)
48
P4.6
I
Data receive for sub(chassis) CPU communication (serial)
49
P4.5
I
Clock for sub(chassis) CPU communication (serial)
50
P4.4
O
Not used
[IC7601
: DIGITAL PWB ASS'Y]
Function
Pin
Pin name
I/O
51
NC
O
Not used
52
NC
O
Not used
53
NC
O
Not used
54
NC
O
Not used
55
NC
O
Not used
56
NC
O
Not used
57
NC
O
Not used
58
NC
O
Not used
59
NC
O
Not used
60
NC
O
Not used
61
NC
O
Not used
62
HSYNC
I
H. sync for OSD
63
NC
O
Not used
64
VSYNC
I
V. sync for OSD
65
NC
O
Not used
66
NC
O
Not used
67
NC
O
Not used
68
NC
O
Not used
69
NC
O
Not used
70
NC
O
Not used
71
P2.1
O
Clock for Inter IC (serial) bus control
72
P2.0
I/O Data for Inter IC (serial) bus control
73
NC
O
Not used
74
NC
O
Not used
75
NC
O
Not used
76
NC
O
Not used
77
NC
O
Not used
78
NC
O
Not used
79
NC
O
Not used
80
P1.0
O
Function LED lighting
81
P0.7
O
Communication LED lighting
82
P0.6
O
Test point
83
NC
O
Not used
84
WAKE
O
Reset for sub(chassis) CPU
85
CARD_DET
I
Not used
86
POWER_SW
I
Power switch (mechanical) detection
87
SDA
I/O Data for Inter IC (serial) bus control : memory
88
SLC
O
Clock for Inter IC (serial) bus control : memory
89
DIGR2
O
R [2] for OSD
90
DIGG2
O
G [2] for OSD
91
DIGB2
O
B [2] for OSD
92
NC
O
Not used
93
KEY2
I
Key scan data for front control button (MENU/CH+/CH-) KEY2
94
KEY1
I
Key scan data for front control button (INPUT/VOL+/VOL-) KEY1
95
VHOLD2
I
Data slice for sub screen closed caption
96
HLF2
I/O LPF for sub screen closed caption video input
97
CVIN2
I
Video(Y) for sub screen closed caption
98
TVSETB
I
Test terminal [L Fixed]
99
VCCE
I
5V stand-by power supply
100
CVIN1
I
Video(Y) for main screen closed caption
Function
(No.YA337)1-9
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