LG KF750 Service Manual page 41
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Also See for KF750:
- User manual (266 pages) ,
- Quick reference manual (226 pages) ,
- Brochure & specs (12 pages)
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3. TECHNICAL BRIEF
3.1.13 KeyPad, Touch button and Touch screen
There are 21 buttons and 5 side keys and touch button in Figure 2-1-13/14. Shows the Keypad circuit.
'END' Key is connected ONSWAn for Veronica.
When Touch button and Touch screen is touched, Interrupt is given to Asta than, she read the status
register what button is touched by I2C. I2C is realize by Asta GPIO.
KEYOUT0
KEYOUT1
KEYOUT2
KEYOUT3
KEYOUT4
V
D
D
E
_
1
V
8
R
1
K
E
Y
O
U
T
1
K
E
Y
O
U
T
2
K
E
Y
O
U
T
3
K
E
Y
N I
0
K
E
Y
O
U
T
4
K
E
Y
N I
1
K
E
Y
N I
2
K
E
Y
N I
3
S
E
N
D
K
E
Y
O
U
T
1
C
L
R
K
E
Y
O
U
T
2
K
E
Y
N I
4
K
E
Y
N I
5
V
D
D
E
_
1
V
8
1
0
K
R
9
0
0
1
0
K
R
9
0
1
LGE Internal Use Only
KEYIN0
KEYIN1
VOLUME1
VOLUME2
1
2
4
5
7
8
*
0
Table 3-1-8. Key Matrix Mapping Table
N
U
M
B
E
R
_
K
E
Y
A
1
0
1
1
0
1
1
0
2
1
0
3
0
K
1
2
3
1
0
4
1
0
5
1
0
6
4
5
6
1
0
7
1
0
8
1
0
9
7
8
9
H
O
T
1
0
1
1
1
0
H
O
T
1
0
2
H
O
T
4
0
H
O
T
5
O
K
O
N
S
W
D
9
0
0
O
N
S
W
A
_
n
R
B
5
2
1
S
3 -
0
Figure 3-1-14. KEY CIRCUIT
KEYIN2
KEYIN3
3
MULTI
6
CAMAF
9
CAMSHOT
#
HOME
K
E
Y
O
U
T
2
K
E
Y
O
U
T
3
K
E
Y
N I
3
K
E
Y
O
U
T
1
K
E
Y
O
U
T
4
K
E
Y
N I
3
E
N
D
A
_
n
V
A
9
0
0
C I
V
S
0
5
1
4
X
3
5
0
F
R
O
N
_
S
W
K
E
Y
Copyright © 2008 LG Electronics. Inc. All right reserved.
- 42 -
KEYIN4
KEYIN5
SEND
OK
CLR
4
1
S
W
1
1
0
1
3
2
M
U
L
I T
H
O
M
E
C
N
7
0
3
1
K
E
Y
O
U
T
0
2
K
E
Y
N I
0
3
K
E
Y
N I
1
4
Only for training and service purposes
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