1
1
2
2
3
3
4
4
D D
C C
B B
A A
Title
Number RevisionSize
A4
Date: 2021/7/14 Sheet of
File: E:\电路城\电子钟（温度，秒表，闹钟）\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
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
1
2
P1
电源接口
GND
VCC
S2
SW-PB
S3
SW-PB
S4
SW-PB
S5
SW-PB
S6
SW-PB
GND
P10
P11
P12
P13
P14
Q1
NPN
3
VCC
2
DQ
1
GND
30.0
U3
DS18B20
GND
VCC
P34
S7
SW-PB
S8
SW-PB
S9
SW-PB
S10
SW-PB
S11
SW-PB
GND
P32
P33
P23
P22
P21
P23
P22
P21
X1
2
VCC1
8
VCC2
1
RST
5
SCLK
7
I/O
6
X2
3
GND
4
U2
DS1302
1 2
Y2
XTAL
BT?
Battery
GND
VCC
P35
P36
P37
