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: 2020/6/30 星期二 Sheet of
File: J:\办公2020-下\秒表6.30\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
Vin Vout
GND
VR1
Volt Reg
30pF
C5
Cap
10uF
C7
Cap Pol1
30pF
C6
Cap
10K
R1
Res2
0.1uF
C2
Cap
100uF
C1
Cap Pol1
0.1uF
C4
Cap
100uF
C3
Cap Pol1
1
2
P1
电源接口
GND
GND
VCC
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
U2
1
2
3
4
5
6
7
8
9
RP1
RESP
S1
SW-PB
Q1
PNP
LS1
Speaker
VCC
1K
R?
RPot
VCC
GND
10K
R2
Res2
VCC
Q2
PNP
10K
R3
Res2
VCC
Q3
PNP
10K
R4
Res2
VCC
Q4
PNP
10K
R5
Res2
VCC
P26
10K
R6
Res2
P10
P11
P12
P13.
P10
P11
P12
P13
WP
7
SDA
5
SCK
6
A2
3
A1
2
A0
1
U3
24C02
GND
P36
P37
P37
P36
S2
SW-PB
P30
S3
SW-PB
P31
S4
SW-PB
P32
S5
SW-PB
P33
S6
SW-PB
P34
S7
SW-PB
P35
S8
SW-PB
P27
GND
P30
P31
P32
P33
P35
P34
P27
P26
电源
按键电路
蜂鸣器电路
存储电路
PI001
PI002
PI003
PI005
PI006
PI007
CO
PI001
PI002
PI003
PI004
PI005
PI006
PI007
PI008
PI009
PI00A
PI00D0 PI00D1 PI00D2 PI00D3 PI00D4 PI00D5
PI00D6
PI00D7
PI00E
PI00GND
PI00K
PI00RS PI00RWPI00V0
PI00VCC
PIC?01
PIC?02
PIC?01
PIC?02
PIC?01
PIC?02 PIC?01
PIC?02
PIC?01
PIC?02
PIC?01
PIC?02
PIC?01
PIC?02
PILS?01
PILS?02
PIP?01
PIP?02
PIQ?01
PIQ?02
PIQ?03
PIQ?01
PIQ?02
PIQ?03
PIQ?01
PIQ?02
PIQ?03
PIQ?01
PIQ?02
PIQ?03
PIR?01PIR?02
PIR?01
PIR?02
PIR?01
PIR?02
PIR?01
PIR?02
PIR?01
PIR?02
PIR?01
PIR?02
PIR?03
PIR?01
PIR?02
PIS?01 PIS?02
PIS?01 PIS?02
PIS?01 PIS?02
PIS?01 PIS?02
PIS?01 PIS?02
PIS?01 PIS?02
PIS?01 PIS?02
PIS?01
PIS?02
PIU?01
PIU?02
PIU?03
PIU?04
PIU?05
PIU?06
PIU?07
PIU?08
PIU?09
PIU?010
PIU?011
PIU?012
PIU?013
PIU?014
PIU?015
PIU?016
PIU?017
PIU?018
PIU?019
PIU?020
PIU?021
PIU?022
PIU?023
PIU?024
PIU?025
PIU?026
PIU?027
PIU?028
PIU?029
PIU?030
PIU?031
PIU?032
PIU?033
PIU?034
PIU?035
PIU?036
PIU?037
PIU?038
PIU?039
PIU?040
PIVR?01
PIVR?02
PIVR?03
PIY101 PIY102
PI001
PI002
PI003PI007
PI00GND
PI00K
PIC?01
PIC?02
PIP?01
PIR?01
PIS?02
PIU?020
PIVR?02
PI002
PI00D0
PIU?039
PI003
PI00D1
PIU?038
PI004
PI00D2
PIU?037
PI005
PI00D3
PIU?036
PI006
PI00D4
PIU?035
PI007
PI00D5
PIU?034
PI008
PI00D6
PIU?033
PI009
PI00D7
PIU?032
PI00E
PIU?023
PI00RS
PIU?021
PI00RW
PIU?022
PI00V0
PIR?03
PIC?01 PIC?02
PIP?02
PIVR?01
PIC?02
PIU?019
PIY102
PIU?018
PIY101
PIR?02
PIS?02
PIU?09
PILS?01
PIR?02
PILS?02
PIQ?01
PIQ?02
PIR?01
PIU?05
PIU?06
PIU?07
PIU?08
PIU?024
PIU?025
PIU?026
PIU?029
PIU?030
PIR?02
PIU?01
NL
PIR?02
PIU?02
NL
PIR?02
PIU?03
NL
PIR?02
PIU?04
NL
PIR?01
PIU?027
NL
PIS?01
PIU?028
NL
PIS?01
PIU?010
NL
PIS?01
PIU?011
NL
PIS?01
PIU?012
NL
PIS?01
PIU?013
NL
PIS?01
PIU?014
NL
PIS?01
PIU?015
NL
PI006
PIU?016
NL
PI005
PIU?017
NL
PI001
PI00A
PI00VCC
PIC?01
PIC?02
PIQ?03
PIR?02
PIS?01
PIU?031
PIU?040
PIVR?03
