1
1
2
2
3
3
4
4
D D
C C
B B
A A
C1
30pf
C3
30pf
1 2
Y1
晶振
GND
C2
10uf
VCC
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
(RXD)P3.0
10
(TXD)P3.1
11
(INT0)P3.2
12
(INT1)P3.3
13
(T0)P3.4
14
(T1)P3.5
15
(WR)P3.6
16
(RD)P3.7
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/VPP
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
P1.0
P1.1
P1.2
P1.3
P1.4
P1.5
P1.6
P1.7
RES
P3.0
P3.1
P3.2
P3.3
P3.4
P3.5
P3.6
P3.7
XTAL2
XTAL1
P2.0
P2.1
P2.2
P2.3
P2.4
P2.5
P2.6
P2.7
P0.7
P0.6
P0.5
P0.4
P0.3
P0.2
P0.1
P0.0
VCC
GND
XTAL2
XTAL1
RES
VCC
P0.0
P0.1
P0.2
P0.3
P0.4
P0.5
P0.6
P0.7
1
2
P2
电源接口
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
LCD1
GND GND
VCC VCC
P2.7
P2.6
P2.5
P0.0
P0.1
P0.2
P0.3
P0.4
P0.5
P0.6
P0.7
R6
10K
VCC GND
VO
VO
1
2
3
4
5
6
7
8
9
P1
排阻
1 1
3 3
S4
10K
R5
R4
1k
GND
GND
GND
LS1
蜂鸣器
Q1
PNP
VCC
R2
1k
GND
P1.0
1 1
3 3
S2
1 1
3 3
S1
P3.7
P3.6
D1
LED
VCC
R1
1k
R3
1k
D2
LED
P1.1
P1.2
GND
TXD
RXD
VCC
P3
下载接口
GND
VCC
1 1
3 3
S3
P3.5
GND
1
DQ
2
VCC
3
J1
DS18B20
GND
P1.0
VCC
VCC
1
2
3
4
J2
5V
VCC
