8
(X25-)IC4:Panel µ-com
Pin
Pin Name
I/O
Description
Processing Operation
58
NC
O
Not used.
L : Fixed.
59
Vcc
-
Power source terminal
60~62
NC
O
Not used.
L : Fixed.
63
RD
O
External memory read request
L : Read
64
NC
-
L : Fixed.
65~68
NC
O
Not used.
L : Fixed.
69
CS0
O
External ROM CE terminal
L : External ROM selection
70,71
NC
O
Not used.
H : Fixed
72
A20
O
External bus ADDR 20
73
A19
O
External bus ADDR 19
74
Vcc
-
Power source terminal
75
A18
O
External bus ADDR 18
76
Vss
-
GND terminal
77~85
A17~A9
O
External bus ADDR 17~9
86~90
NC
O
Not used.
L : Fixed.
91
Vcc
-
Power source terminal
92
A8
O
External bus ADDR 8
93
Vss
-
GND terminal
94~100
A7~A1
O
External bus ADDR 7~1
101
NC
O
Not used.
L : Fixed.
102~113
D15~D4
I/O
External bus DATA 15~4
114~118
NC
O
Not used.
L : Fixed.
119~122
D3~D0
I/O
External bus DATA 3~0
123
NC
O
Not used.
L : Fixed.
124~128
KS0~KS4
O
Key scan output 0~4
129
KR5
I
Key return signal input 5
-
GND terminal
O
Not used.
L : Fixed.
-
Power source terminal
O
Not used.
L : Fixed.
I
Key return signal input 0
O
Power source control terminal
H : POWER ON
O
Not used.
L : Fixed
I
Key return signal input 1~3
-
GND terminal
141
KR4
I
Key return signal input 4
142
Vref
-
143
Avcc
-
Power source terminal
144
NC
I
Not used.
MICROCOMPUTER’S TERMINAL DESCRIPTION
DPX-6020
www. xiaoyu163. com
QQ 376315150
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TEL 13942296513
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
