1
1
2
2
3
3
4
4
D D
C C
B B
A A
Title
Number RevisionSize
A4
Date: 2021/5/5 星期三 Sheet of
File: F:\办公2021\汽车测速5.5\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
R2
Res2
GND
VCC
1
2
3
4
5
6
7
8
9
RP1
RESP
S1
SW-PB
Q1
PNP
LS1
Speaker
A
B
C
D
E
F
G
DP
1
2
3
4
5
6
L1
数码管6
VCC
GND
10K
R1
Res2
1
2
P1
转速输入
GND
S3
SW-PB
S4
SW-PB
S2
SW-PB
S7
SW-PB
S8
SW-PB
S6
SW-PB
S11
SW-PB
S12
SW-PB
S10
SW-PB
P10
P11
P12
P13
P14
P15
P16
P17
P10
P11
P12
P14
P15
P16
2
3
6
4 7
1
8
5
AR1
Op Amp
VCC
GND
10K
R5
Res2
10K
R4
Res2
VCC
