Finish
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VCC
VCC
VCC
C1
4
R 2 10k
4 19
1 0 5 p P 3 .7 P 3 .6
2 3 1
VCC
20
V R E F /2 C L K IN C LKR RD W R CS
B0 B1 B2 B3 B4 B5 B6 B7
IN T R
V C C /V R E F
5
P 3 .5
P 1 .0 P 1 .1 P 1 .2 P 1 .3
1 2 3 4 5 6 7 8
AD C 0804 C3 30p Y1 VCC MODE
SW 3
31 9
VCC
0 1 2 3 4 5 6 7
P 1 .0 P 1 .1 P 1 .2 P 1 .3 P 1 .4 P 1 .5 P 1 .6 P 1 .7 XTA L1 XTA L2 E A /V P P RST
P 2 .0 /A 8 P 2 .1 /A 9 P 2 .2 /A 1 0 P 2 .3 /A 1 1 P 2 .4 /A 1 2 P 2 .5 /A 1 3 P 2 .6 /A 1 4 P 2 .7 /A 1 5
P 3 .0 /R XD P 3 .1 /T XD P 3 .2 /IN T 0 P 3 .3 /IN T 1 P 3 .4 /T 0 P 3 .5 /T 1 P 3 .6 /W R P 3 .7 /R D A L E /P R O G PSEN
ALE 14 P 3 .7 1 7 VCC 1 18 P 3 .6 1 5 13
P 2 .0 P 2 .1 P 2 .2 P 2 .3 P 2 .4 P 2 .5 P 2 .6 P 2 .7
MODE 10 UP 11 DOW N 12 SET 13 14 1 5 P 3 .5 16 17
NGUON1 1 2 CON2
J1
30 29
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
AT89C 51
20
R5
C5 30p
VCC
19 18
P 0 .0 /A D P 0 .1 /A D P 0 .2 /A D P 0 .3 /A D P 0 .4 /A D P 0 .5 /A D P 0 .6 /A D P 0 .7 /A D
VCC
D D D D D D D D
21 22 23 24 25 26 27 28
GND
9
+ IN -IN
39 38 37 36 35 34 33 32
AGND
OUT
GND
74LS47
B I/R B O
13 12 11 10 9 15 14
U3 18 17 16 15 14 13 12 11
8
VCC
LT RBI
A B C D E F G
GND
U1
0 1 2 3
6 7
10
3 5
D D D D
GND
7 1 2 6
3
8
P 1 .0 P 1 .1 P 1 .2 P 1 .3 VCC
U6
G I-N H V C C 1 VS+ 1 2 Lm 35 3 4 D1 R1 5 5v 10k 6 7 CON7
2
16
U2
40
VCC
R6 100 SW 2 R ST_A1
SW 5
R9
UP
R 13
SW 7 DOW N
R 14
SET
C7 10u R 10 8 .2 K
SW 8
H EAD ER 19
VCC R 15
R 16
R 17
R 18
R 19
R 20
R 21
VCC
VCC
C1
4
R 2 10k
4 19
1 0 5 p P 3 .7 P 3 .6
2 3 1
VCC
20
V R E F /2 C L K IN C LKR RD W R CS
B0 B1 B2 B3 B4 B5 B6 B7
IN T R
V C C /V R E F
5
P 3 .5
P 1 .0 P 1 .1 P 1 .2 P 1 .3
1 2 3 4 5 6 7 8
AD C 0804 C3 30p Y1 VCC MODE
SW 3
31 9
VCC
0 1 2 3 4 5 6 7
P 1 .0 P 1 .1 P 1 .2 P 1 .3 P 1 .4 P 1 .5 P 1 .6 P 1 .7 XTA L1 XTA L2 E A /V P P RST
P 2 .0 /A 8 P 2 .1 /A 9 P 2 .2 /A 1 0 P 2 .3 /A 1 1 P 2 .4 /A 1 2 P 2 .5 /A 1 3 P 2 .6 /A 1 4 P 2 .7 /A 1 5
P 3 .0 /R XD P 3 .1 /T XD P 3 .2 /IN T 0 P 3 .3 /IN T 1 P 3 .4 /T 0 P 3 .5 /T 1 P 3 .6 /W R P 3 .7 /R D A L E /P R O G PSEN
ALE 14 P 3 .7 1 7 VCC 1 18 P 3 .6 1 5 13
P 2 .0 P 2 .1 P 2 .2 P 2 .3 P 2 .4 P 2 .5 P 2 .6 P 2 .7
MODE 10 UP 11 DOW N 12 SET 13 14 1 5 P 3 .5 16 17
NGUON1 1 2 CON2
J1
30 29
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
AT89C 51
20
R5
C5 30p
VCC
19 18
P 0 .0 /A D P 0 .1 /A D P 0 .2 /A D P 0 .3 /A D P 0 .4 /A D P 0 .5 /A D P 0 .6 /A D P 0 .7 /A D
VCC
D D D D D D D D
21 22 23 24 25 26 27 28
GND
9
+ IN -IN
39 38 37 36 35 34 33 32
AGND
OUT
GND
74LS47
B I/R B O
13 12 11 10 9 15 14
U3 18 17 16 15 14 13 12 11
8
VCC
LT RBI
A B C D E F G
GND
U1
0 1 2 3
6 7
10
3 5
D D D D
GND
7 1 2 6
3
8
P 1 .0 P 1 .1 P 1 .2 P 1 .3 VCC
U6
G I-N H V C C 1 VS+ 1 2 Lm 35 3 4 D1 R1 5 5v 10k 6 7 CON7
2
16
U2
40
VCC
R6 100 SW 2 R ST_A1
SW 5
R9
UP
R 13
SW 7 DOW N
R 14
SET
C7 10u R 10 8 .2 K
SW 8
H EAD ER 19
VCC R 15
R 16
R 17
R 18
R 19
R 20
R 21
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