基于单片机10通道数据采集系统设计
80c51 P0.0 P0.1 P0.2 P0.3 P0.4 P0.5 P0.6 P0.7 39 38 37 36 35 34 33 32 P0.0/AD0 P0.1/AD1 P0.2/AD2 P0.3/AD3 P0.4/AD4 P0.5/AD5 P0.6/AD6 P0.7/AD7 P1.0 P1.1 P1.2 P1.3 P1.4 P1.5 P1.6 P1.7 RST ALE PSEN EA P3.0/RXD P3.1/TXD P3.2/INT0 P3.3/INT1 P3.4/T0 P3.5/T1 P3.6/WR P3.7/RD GND 10 X1 X2 1 19 18 X1 X2 Y? 10 11 12 13 14 15 16 17 RXD TXD /INT0 /INT1 /TO /T1 /WR /RD GND DS5000-8-16 2 XTAL C? Cap 30pF C? Cap 30pF P2.0/A8 P2.1/A9 P2.2/A10 P2.3/A11 P2.4/A12 P2.5/A13 P2.6/A14 P2.7/A15 P0.0 P0.1 P0.2 P0.3 P0.4 P0.5 P0.6 P0.7 D0 D1 D2 D3 D4 D5 D6 D7 GND MC74HC573N Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7 2 3 4 5 6 7 8 9 19 18 17 16 15 14 13 12 21 22 23 24 25 26 27 28 D0 D1 D2 D3 D4 D5 D6 D7 GND ALE 1 11 OE LE VDD 20 VCC 1 2 3 4 5 6 7 8 9 30 29 31 20 40 VCC P1.0 P1.1 P1.2 P1.3 P1.4 P1.5 P1.6 P1.7 ALE /PSEN /EA R? Res1 200 R? Res1 1K GND MC74HC573N VCC Q0 Q1 Q2 Q3 Q4 Q5 Q6 Q7
AD574
5 Q0 Q7 3 6 Q1 4 GND 2
RPot2 R1 100K
12 13 14
ACC C? Cap 30pF
10 8
R2RPot2 100K
GND 9 GND 15
R/C V+ CS VL+ CE A0 STAT 12/8 D11 D10 BIPO D9 10V RNG D8 20V RNG D7 D6 D5 REF IN D4 REF O D3 D2 D1 D0
7 1
5V +15
28 27 26 25 24 23 22 21 20 19 18 17 16
STS P0.7 P0.6 P0.5 P0.4 P0.3 P0.2 P0.1 P0.0
AGND DGND U?A 1 2 DM74LS00M 3
VEE
11
-15
S? SW-PB
ADC574AJP STS
P3.0
74ls150 DATA8 DATA7 DATA6 2 DATA5 U?A DM74LS04M 1 DATA4 DATA3 DATA2 DATA1 GND 1 2 3 4 5 6 7 8 9 10 P1.3 GND 11 12 E7 E6 E5 E4 E3 E2 E1 E0
VCC
24
VCC
E8
23
DATA9
E9
22
DATA10
E10
21
E11
20
E12
19
E13
18
E14
17
STORBE
E15
16
7、电路连接图
W OUT D
A
15
P1.0
B
14
P1.1
GND
C
13
P1.2
74ls150