1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
D D
C C
B B
A A
Title
Number RevisionSize
A3
Date: 2021/7/17 Sheet of
File: E:\电路城\心率检测(LCD)\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
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
LS1
Speaker
GND
VCC
GND
10K
R2
Res2
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
GND
VCC
P37
2
3
6
4 7
1
8
5
U2
Op Amp
GND
VCC
D1
Diode 1N4004
10K
R4
Res2
10K
R3
Res2
GND
VCC
47nF
C8
Cap
10uF
C9
Cap Pol1
10K
R5
Res2
GND
2
3
6
4 7
1
8
5
U3
Op Amp
GND
VCC
10K
R6
Res2
10K
R8
Res2
10K
R7
Res2
GND
GND
2
3
6
4 7
1
8
5
U4
Op Amp
GND
VCC
10K
R9
Res2
10K
R11
Res2
10K
R10
Res2
GND
GND
P33
10K
R12
Res2
0.1uF
C10
Cap
0.1uF
C11
Cap
0.1uF
C12
Cap
U5
Optoisolator1
GND
10K
R13
Res2
10K
R14
Res2
VCC
1
2
P1
电源接口