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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-