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

5VCC
0
5VCC
0
0
0
5VCC
5VCC
5VCC
0
0
5VCC
0
0
0
5VCC
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>

<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

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

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

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