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IC BLOCK DIAGRAM & DESCRIPTION
IC500 M37903S4CHP (16-bit C-Mos Micro Computer)
75
74
73
72
P10
/A
3
3
76
P10
/A
2
2
77
P10
/A
1
1
78
P10
/A
0
0
79
P8
/T
D
7
X
1
80
P8
/R
D
6
X
1
81
P8
/CTS
/CLK
5
1
1
82
P8
/CTS
/RTS
/INT4
83
4
1
1
P8
/TxD
3
0
84
P8
/RxD
85
2
0
P8
1
/CTS
0
/CLK
0
86
V
CC
87
AV
CC
88
V
89
REF
AV
90
SS
V
SS
91
NMI
92
P8
0
/CTS
0
/RTS
0
/INT
3
93
P7
/AN
/AD
/DA
/(INT
)
94
7
7
TRG
1
2
P7
/AN
/DA
95
6
6
0
P7
/AN
/(INT
)
96
5
5
4
P7
/AN
/(INT
)
97
4
4
3
P7
3
/AN
3
98
P7
2
/AN
2
99
P7
/AN
1
1
100
1
2
3
- 74 -
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
55
54
53
52
51
P1
/D
/LA
50
3
3
3
P1
/D
/LA
49
4
4
4
P1
/D
/LA
48
5
5
5
47
P1
6
/D
6
/LA
6
46
P1
7
/D
7
/LA
7
45
P2
0
/D
8
44
P2
/D
1
9
43
P2
/D
2
10
42
P2
/D
3
11
41
P2
/D
4
12
40
P2
/D
5
13
39
P2
/D
6
14
38
P2
/D
7
15
37
V
CC
36
X
OUT
X
35
IN
34
V
SS
33
MD0
32
RESET
31
CDSEL
30
BYTE
29
P3
/RDY
0
28
P3
1
/RD
27
P3
2
/BLW
26
P3
/BHW
3
21
22
23
24
25
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