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Copyright © 2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
3. TECHNICAL BRIEF
LG Electronics
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LGE Property
3.8 Keypad Switching & Scanning
The keypad is controlled by a Key coder IC (PP2106M3). It can be used for scanning keypads up to 8 rows and
8 columns (max 64 keys). PMB8877 control PP2106M3 by KEY_I2C_SCL, KEY_I2C_SDA and KEY_INT.
Figure 10 Key pad part key matrix
0
R401
R402
0
PP2106M2
EUSY0300004
U401
41
31
21
11
01
9
8
15
7
16
6
17
5
18
4
19
3
20
2
21
1
22
32
42
52
62
72
82
92
D
N
G
P
2
D
N
G
BT
E
S
E
R
I
X
O
X
L
E
S_
KL
C
D
D
V
01
P
TEST
P40
SEL_28P
P41
P57
P42
P56
P43
P55
P44
P17
P45
P15
P46
1
D
N
G
45
P
35
P
25
P
15
P
05
P
74
P
p7
2
02
4
C
27p
C421
p7
2
22
4
C
p7
2
32
4
C
470
R407
p7
2
42
4
C
07
4
80
4
R
27p
C425
4.7K
R409
470
R410
p7
2
62
4
C
470
R411
p7
2
72
4
C
07
4
21
4
R
p7
2
82
4
C
470
R413
470
R414
100n
C429
27p
C430
07
4
51
4
R
07
4
61
4
R
470
R418
p7
2
13
4
C
27p
C432
27p
C433
470
R419
470
R420
470
R421
p7
2
43
4
C
100n
C435
0
R422
07
4
32
4
R
p7
2
63
4
C
120K
R424
470
R425
4.7K
R426
2
L
O
C
_
Y
E
K
KEY_ROW2
KEY_ROW0
3
L
O
C
_
Y
E
K
KEY_ROW3
KEY_ROW1
O
I
V
_
2
6
V
2
2V62_VIO
2V62_VIO
2V62_VIO
1
L
O
C
_
Y
E
K
KEY_ROW6
0
L
O
C
_
Y
E
K
KEY_ROW5
KEY_I2C_SCL
4
L
O
C
_
Y
E
K
KEY_COL5
KEY_COL6
KEY_COL7
KEY_ROW4
A
D
S
_
C
2
I
_
Y
E
K
KEY_INT
(1%)
QWERTY KEY
KB401
27p
C406
27p
C407
27p
C410
27p
C411
27p
C412
27p
C413
KB402
KB403
KB404
KB405
KB406
KB407
KB408
KB409
KB410
KB411
KB412
KB413
KB414
KB415
KB416
KB417
KB418
KB419
KB420
KB421
KB422
KB423
KB424
KB425
KB426
KB427
KB428
KB429
KB430
KB431
KB432
KB433
KB434
KB435
KB436
KB437
KB438
KB439
KB440
KB441
KB442
KB443
KB444
KB445
KB446
KB447
KEY_COL2
KEY_ROW2
KEY_ROW0
KEY_COL3
KEY_ROW3
KEY_ROW1
KEY_COL1
KEY_COL0
KEY_ROW5
KEY_COL4
KEY_COL5
KEY_COL6
KEY_COL7
KEY_ROW4
Shift
Fn2
END
MULTI
SEND
Vol_DOWN
Vol_UP
CAM
KEY_ROW6
POWER&LOCK
Enter
CLR
Down
M
.
L
Up
Left
Right
O
N
V
X
Sym
J
W
S
I
G
U
K
A
@
C
Space
P
B
Q
SNS
Push @
Fn1
T
IM
MSG
Browser
`
D
Z
Y
R
H
E
F
Содержание GT350
Страница 1: ...Service Manual Model GT350 Internal Use Only Service Manual GT350 Date May 2010 Issue 1 0 ...
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