1
1
2
2
3
3
4
4
D D
C C
B B
A A
Title
Number RevisionSize
A4
Date: 2021/9/29 Sheet of
File: I:\办公2021下\电机9.28\原理图\Sheet1.SchDocDrawn By:
P1.0
1
P1.1
2
P1.2
3
P1.3
4
P1.4
5
P1.5
6
P1.6
7
P1.7
8
RST
9
P3.0/RXD
10
P3.1/TXD
11
P3.2/INT0
12
P3.3/INT1
13
P3.4/T0
14
P3.5/T1
15
P3.6/WR
16
P3.7/RD
17
XTAL2
18
XTAL1
19
GND
20
P2.0
21
P2.1
22
P2.2
23
P2.3
24
P2.4
25
P2.5
26
P2.6
27
P2.7
28
PSEN
29
ALE/PROG
30
EA
31
P0.7
32
P0.6
33
P0.5
34
P0.4
35
P0.3
36
P0.2
37
P0.1
38
P0.0
39
VCC
40
U1
80511 2
Y1
XTAL
30pF
C2
Cap
10uF
C1
Cap Pol1
30pF
C3
Cap
10K
R1
Res2
GND
VCC
1
2
3
4
5
6
7
8
9
RP1
S1
SW-PB
S2
SW-PB
S3
SW-PB
S4
SW-PB
S5
SW-PB
P30
P31
P32
P33
P34
P35
P36
P37
P10
P11
P12
P13
P14
P15
P16
P17
Vin Vout
GND
7805
Volt Reg
0.1uF
C5
Cap
100uF
C4
Cap Pol1
0.1uF
C7
Cap
100uF
C6
Cap Pol1
1
2
P1
电源接口
GND
VCC
A
1
B
2
C
3
Y0
15
Y1
14
Y2
13
Y3
12
Y4
11
Y5
10
Y6
9
Y7
7
E1
6
E2
4
E3
5
U2
74138
VCC
GND
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
1B
1
2B
2
3B
3
4B
4
5B
5
6B
6
7B
7
1C
16
2C
15
3C
14
4C
13
5C
12
6C
11
7C
10
COM
9
U3
ULN2003
M
B1
Motor Step
VCC
P10
P11
P12
P13
GND
P30
P31
P32
P33
P27
P26
AB/BA
1
A0
2
A1
3
A2
4
A3
5
A4
6
A5
7
A6
8
A7
9
GND
10
VCC
20
CE
19
B0
18
B1
17
B2
16
B3
15
B4
14
B5
13
B6
12
B7
11
*
74LS245
GND
GND
D0
D1
D2
D3
D4
D5
D6
D7
Y0
Y1
Y2
Y3
Y4
Y5
Y6
Y7
D0
D1
D2
D3
D4
D5
D6
D7
A
B
C
D
E
F
G
DP
1
2
3
4
DS1
A
B
C
D
E
F
G
DP
1
2
3
4
DS2
D0
D1
D2
D3
D4
D5
D6
D7