SƠ ĐỒ NGUYÊN LÝ ĐỒNG HỒ SỐ DÙNG LCD+DS1307+89S52

5
5
4
4
3
3
2
2
1
1
D D
C C
B B
A A
RS
RW
D0
D1
D2
D3
D4
D5
D6
D7
E
UPUP
RST
SCL
SDA
XTAL1
XTAL2

SDA
D0XTAL2
D1
XTAL1
D2
D3
D4
RST
D6
D5
D7
RS
RW
E
DNDN
OK
SCL
RST
VCC
MISO
SCK
MOSI
SCK
MISO
MOSI
SDA
0
0
5VCC
5VCC

5VCC
0
5VCC
0
0
0
5VCC
5VCC
5VCC
0
0
5VCC
0
0
0
5VCC
Title
Size Document Number Rev
Date: Sheet of
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<Title>
A4
1 1Thursday, April 24, 2014
Title
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<Title>

A4
1 1Thursday, April 24, 2014
Title
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Date: Sheet of
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<Title>
A4
1 1Thursday, April 24, 2014
Title
Size Document Number Rev
Date: Sheet of
<Doc>
<RevCode>
<Title>
A4
1 1Thursday, April 24, 2014
Title
Size Document Number Rev
Date: Sheet of
<Doc>
<RevCode>
<Title>
A4
1 1Thursday, April 24, 2014
Title
Size Document Number Rev
Date: Sheet of
<Doc>

<RevCode>
<Title>
A4
1 1Thursday, April 24, 2014
12
12
Y2
32.768H
Y2
32.768H
12
SW1SW1
12
R2
8.2k
R2
8.2k
12
R9
RESISTOR
R9
RESISTOR
12
J2
CON2
J2
CON2
1
2
LCD

U3
LCD
LCD
U3
LCD
VSS
1
VDD
2
VEE
3
RS
4
RW
5
E
6
D0
7
D1
8
D2
9
D3
10
D4
11
D5
12
D6

13
D7
14
A
15
K
16
BT1
3V
BT1
3V
12
SW2SW2
12
C1
CAP
C1
CAP
12
U2
DS1307
U2
DS1307
GND
4
SQW/OUT
7
SDA
5
X1

1
X2
2
SCL
6
VBAT
3
VCC
8
R7R7
12
SW3SW3
12
12
J1
CON6
J1
CON6
1
2
3
4
5
6
R3
RES
R3
RES
13
2

SW4SW4
12
C2
33P
C2
33P
12
R8R8
12
C3
33P
C3
33P
12
89S52
U1
89s52
89S52
U1
89s52
p1.0 (T2)
1
p1.1 (T2 EX)
2
p1.2
3
p1.3
4
p1.4
5

p1.5 ( MOSI)
6
p1.6 (MISO)
7
p1.7 (SCK)
8
RST
9
P3.0
10
P3.1
11
P3.2
12
P3.3
13
P3.4
14
P3.5
15
P3.6
16
P3.7
17
XTAL1
18
XTAL2
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
Y1
12M
Y1
12M
12