1
1
2
2
3
3
4
4
D D
C C
B B
A A
Title
Number RevisionSize
A4
Date: 2017/4/28 Sheet of
File: E:\创新作品区\..\土壤参数综合测试系统的设计.SchDocDrawn By:
12
Y1
XTAL
22pF
C2
22pF
C3
GND
X1
X2
C1
10uF
VCC
R2
10k
GND
RST
GND
T2/P1.0
1
T2EX/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/A8
21
P2.1/A9
22
P2.2/A10
23
P2.3/A11
24
P2.4/A12
25
P2.5/A13
26
P2.6/A14
27
P2.7/A15
28
PSEN
29
ALE
30
EA
31
P0.7/AD7
32
P0.6/AD6
33
P0.5/AD5
34
P0.4/AD4
35
P0.3/AD3
36
P0.2/AD2
37
P0.1/AD1
38
P0.0/AD0
39
VCC
40
U2
STC89C52DIP
X1
X2
RST
S2
S3
GND
K1
K2
S1
S4
K3
1
2
3
4
P3
下载口
VCC
GND
P30
P31
1
2
P1
电源接口
VCC
GND
P00
P01
P02
P03
P04
P05
P06
P07
VCC
GND
GND
P25
P26
P27
VCC
10K
R1
GND
1
VCC
2
VO
3
RS
4
RW
5
E
6
DB0
7
DB1
8
DB2
9
DB3
10
DB4
11
DB5
12
DB6
13
DB7
14
BG/VCC
15
BG/GND
16
U1 LCD1602
1
2
3
4
5
6
7
8
9
P2
排阻
VCC
P00
P01
P02
P03
P04
P05
P06
P07
P25
P26
P27
ADC1
VCC
导电率=(VCC-ADC1)/VCC
1
2
3
P5
DS18B20
GND
4.7K
R7
VCC
DSIO
1
2
3
4
P4
土壤温湿度传感器
VCC
GND
ADC0
P30
P31
DSIO
SET
+
-
IN3
1
IN4
2
IN5
3
IN6
4
IN7
5
START
6
EOC
7
D3
8
OE
9
CLOCK
10
VCC
11
VR+
12
GND
13
D1
14
D2
15
VR-
16
D0
17
D4
18
D5
19
D6
20
D7
21
ALE
22
ADDC
23
ADDB
24
ADDA
25
IN0
26
IN1
27
IN2
28
U3
ADC0808
ADC0
ADC1
K1
K2
K3
P10
P11 P12
P13
P14
P15
P16
P17
GND
ALE
VCC
GNDGND
START
EOC
OE
CLOCK
START
EOC
OE
CLOCK
P10
P11
P12
P13
P14
P15
P16
P17
ADDA
ADDA
Q1
8550
LS1
BEEP
100
R3
VCC
GND
BEEP
LED1
510
R4
BEEP
VCC
LED2
510
R5
VCC
P30
P31
10K
R6
GND
ALE