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Pin No.
Pin name
I/O
Description
45
LROF
0
Test data output. Not used (OPEN)
46
LR1F
0
Test data output. Not used (OPEN)
47
XRST
I
System reset input. (Active "L")
48
EDO
I/O
External RAM data input/output. Not used (L level)
49
ED16
I/O
External RAM data input/output.
50
ED1
I/O
External RAM data input/output. Not used (L level)
51
ED17
I/O
External RAM data input/output.
52
ED2
I/O
External RAM data input/output. Not used (L level)
53
Voo
-
Power supply. (+5V)
54
Vss
-
Power supply. (GND)
55
ED18
I/O
External RAM data input/output.
56
ED3
I/O
External RAM data input/output. Not used (L level)
57
ED19
I/O
External RAM data input/output.
58
ED4
I/O
External RAM data input/output. Not used (L level)
59
ED20
I/O
External RAM data input/output.
60
ED5
I/O
External RAM data input/output. Not used (L level)
61
ED21
I/O
External RAM data input/output.
62
Vss
-
Power supply. (GND)
63
ED6
I/O
External RAM data input/output. Not used (L level)
64
ED22
I/O
External RAM data input/output.
65
ED7
I/O
External RAM data input/output. Not used (L level)
66
ED23
I/O
External RAM data input/output.
67
ED8
I/O
External RAM data input/output. Not used (L level)
68
ED24
I/O
External RAM data input/output.
69
ED9
I/O
External RAM data input/output. Not used (L level)
70
Vss
-
Power supply. (GND)
71
ED25
I/O
External RAM data input/output.
72
ED 10
I/O
External RAM data input/output. Not used (L level)
73
ED26
I/O
External RAM data input/output.
74
ED 11
I/O
External RAM data input/output. Not used (L level)
75
ED27
I/O
External RAM data input/output.
76
ED12
I/O
External RAM data input/output. Not used (L level)
77
ED28
I/O
External RAM data input/output.
78
Voo
-
Power supply. (+5V)
79
Vss
-
Power supply. (GND)
80
ED 13
I/O
External RAM data input/output. Not used (L level)
81
ED29
I/O
External RAM data input/output.
82
ED14
I/O
External RAM data input/output. Not used (L level)
83
ED30
I/O
External RAM data input/output.
84
ED15
I/O
External RAM data input/output. Not used (L level)
85
ED31
I/O
External RAM data input/output.
86
XOE
0
External RAM OE output.
87
Vss
-
Power supply. (GND)
88
CAS
0
External DRAM CAS output.
89
XWE
0
External RAM WE output.
90
RAS
0
External DRAM CAS/external (P) SRAM CEo
91 - 94
EAO-3
0
External RAM address output.
95
Vss
-
Power supply. (GND)
96 - 99
EA4-7
0
External RAM address output.
100
EA8
0
External RAM address output. Not used (OPEN)
-21-
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