完整原理图,按下
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P1 .0
1
P1 .1
2
P1 .2
3
P1 .3
4
P1 .4
5
P1 .5
6
P1 .6
7
P1 .7
8
R ST
9
P3 .0 (R XD)
10
P3 .1 (TXD)
11
P3 .2 (INT0)
12
P3 .3 (INT1)
13
P3 .4 (T0)
14
P3 .5 (T1)
15
P3 .6 (W R)
16
P3 .7 (R D)
17
XTAL2
18
XTAL1
19
GND
20
(A8 )P2.0
21
(A9 )P2.1
22
(A1 0)P2.2
23
(A1 1)P2.3
24
(A1 2)P2.4
25
(A1 3)P2.5
26
(A1 4)P2.6
27
(A1 5)P2.7
28
PS EN
29
ALE/PR OG
30
EA/VP P
31
(AD7)P0 .7
32
(AD6)P0 .6
33
(AD5)P0 .5
34
(AD4)P0 .4
35
(AD3)P0 .3
36
(AD2)P0 .2
37
(AD1)P0 .1
38
(AD0)P0 .0
39
VCC
40
U1
AT89 C5 1
Y1
12 MHz
C2
30
C3
30
C OM
1
R 1
2
R 2
3
R 3
4
R 4
5
R 5
6
R 6
7
R 7
8
R 8
9
R P1
10 K
R 1
10 K
+
C 1
10 uF
3
2 1
P1
POWER
1
1
2
2
3
3
4
4
5
5
6
6
S1
P3 4
TR IG
2
Q
3
R
4
C Vo lt
5
THR
6
DIS
7
VCC
8
GND
1
U3
55 5
R P1
10 k
C4
10 4
C5
10 4
P3 4
1
2
J3
CON2
OE
1
D0
2
D1
3
D2
4
D3
5
D4
6
D5
7
D6
8
D7
9
LE
11
Q7
12
Q6
13
Q5
14
Q4
15
Q3
16
Q2
17
Q1
18
Q0
19
GND
10
VCC
20
U2
74 HC57 3
VCC
A
B
C
D
E
F
G
DP
Q1
90 13
R2
1k
R 3
22 0
VCC
VCC
VCC VCC
VCC
VCC
P2 0
P2 1
P2 2
P2 3
P2 4
P2 5
P2 0
P2 1
P2 2
P2 3
P2 4
P2 5
3H
4H
5H
6H
2H
1H
1H
2H
3H
4H
A
B
C
D
E
F
G
S2
SW -SPST
S1
. . .
a
b
c
d
e
f
g
dp
1H
2H
3H
U2
7LED-3
5H
6H
A
B
C
D
E
F
G
. . .
a
b
c
d
e
f
g
dp
1H
2H
3H
U2
7LED-3