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■ LSI PIN DESCRIPTION
• HD6437042E00F (XT125A00) CPU
PIN
NO.
NAME
I/O
FUNCTION
PIN
NO.
NAME
I/O
FUNCTION
1
PE14
I/O
Port E
57
Dll
I/O
2
PE15
I/O
Port E
58
DIO
I/O
Data bus
3
Vss
Ground
59
D9
I/O
4
AO
I/O
60
D8
I/O
5
A1
I/O
61
Vss
Ground
6
A2
I/O
62
D7
I/O
7
A3
I/O
63
D6
I/O
■
Data bus
8
A4
I/O
64
D5
I/O
9
A5
I/O
65
Vcc
+5D
10
A6
I/O
66
D4
I/O
11
A7
I/O
■
Address bus
67
D3
I/O
12
A8
I/O
68
D2
I/O
'
Data bus
13
A9
I/O
69
D1
I/O
14
A10
I/O
70
DO
I/O
15
All
I/O
71
Vss
Ground
16
A12
I/O
72
XTAL
1
Clock
17
A13
I/O
73
MD3
+5D
18
A14
I/O
74
EXTAL
1
Clock
19
A15
I/O
75
MD2
Ground
20
A16
I/O
76
NMI
Ground
21
Vcc
+5D
77
Vcc
+5D
22
A17
I/O
Address bus
78
MD1
Ground
23
Vss
Ground
79
MDO
+5D
24
PB2
I/O
80
PLLVcc
+5D
25
PB3
I/O
Ports
81
PLLCAP
1
PLL CAPA
26
PB4
I/O
82
PLLVss
1
PLLGND
27
Vss
Ground
83
PA15
Test point 004-1 (Ground)
28
PB5
I/O
Port B
84
/RES
1
Reset
29
A18
I/O
85
PEO
I/O
30
A19
I/O
Address bus
86
PEI
I/O
PortE
31
A20
I/O
87
PE2
I/O
32
A21
I/O
88
PE3
Test point 005-1 (Ground)
33
Vss
Ground
89
PE4
I/O
PortE
34
/RD
I/O
Read S
90
Vss
Ground
35
/WDTOVF
I/O
NO
91
ANO
1
36
/WRH
I/O
Write S
92
AN1
1
Port F/Analog in
37
Vss
Ground
93
AN2
1
38
/WRL
I/O
Write S
94
AN3
Test point 006-1 (Ground)
39
Vss
Ground
95
PF4
1
Port F/Analog in
40
/CS1
I/O
CS (PSRAM)
96
PF5
1
Port F/Analog in
41
/cso
I/O
CS (M ROM)
97
AVss
Ground
42
PA9
I/O
Port A
98
PF6
1
Port F/Analog in
43
PA8
I/O
Port A
99
PF7
1
Port F/Analog in
44
/CS3
I/O
CS (SWPOO)
100
Vcc
+5D
45
/CS2
I/O
CS (M. C)
101
Vss
Ground
46
/DREQO
Ground
102
PE5
I/O
PortE
47
TXD1
I/O
T data (MK)
103
Vcc
+5D
48
RXD1
I/O
R data (MK)
104
PE6
I/O
49
/IRQO
I/O
Ground
105
PE7
I/O
50
TXDO
I/O
T data (MIDI)
106
PE8
I/O
PortE
51
RXDO
I/O
R data (MIDI)
107
PE9
I/O
52
D15
I/O
108
PE10
I/O
53
D14
I/O
Data bus
109
Vss
Ground
54
D13
I/O
110
PE11
I/O
55
Vss
Ground
111
PE12
I/O
Port E
56
D12
I/O
Data bus
112
PEI 3
I/O
12