1
1
2
2
3
3
4
4
D D
C C
B B
A A
Title
Number RevisionSize
A4
Date: 2021/12/29 Sheet of
File: E:\电路城（51单片机）\..\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
15
A
14
D7
13
D6
12
D5
11
D4
10
D3
9
D2
8
D1
7
D0
6
E
5
RW
4
RS
3
V0
2
VCC
1
GND
16
K
LCD1602
LCD1
1
2
3
4
5
6
7
8
9
RP1
RESP
S1
SW-PB
Q1
PNP
GND
GND
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
1K
R2
RPot
VCC
2
3
6
4 7
1
8
5
AR1
Op Amp
VCC
VEE
10K
R4
Res2
10K
R3
Res2
GND
VCC
VCC
250K
R5
Res2
1
2
3
P2
Header 3
1K
R6
Res2
GND
2
3
6
4 7
1
8
5
AR2
Op Amp
VCC
VEE
10K
R8
Res2
10K
R7
Res2
GND
VCC
250K
R10
Res2
1
2
3
P3
Header 3
1K
R9
Res2
Q2
NPN
VCC
GND
26
IN0
27
IN1
28
IN2
1
IN3
2
IN4
3
IN5
4
IN6
5
IN7
25
ADD A
24
ADD B
23
ADD C
22
ALE
12
VREF+
16
VREF-
10
CLOCK
6
START
7
EOC
21
OUT1
20
OUT2
19
OUT3
18
OUT4
8
OUT5
15
OUT6
14
OUT7
17
OUT8
9
OE
U2
ADC0808
VCC
GND
P10
P11
P12
P13
P14
P15
P16
P17
P33
P34
P35
P36
P37
P36
