LG GT350 - Keypad Switching & Scanning

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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 37/115 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
0R401
R402 0
PP2106M2
EUSY0300004
U401
41 31 21
11 0
1
9
8
157
166
175
184
193
202
211
2
2
32
42
52
6
2
72 82
92
DNGP
2DNG
BTESER
IX
OX
LES_KLC
DDV
0
1P
TEST P40
SEL_28P P41
P57 P42
P56 P43
P55 P44
P17 P45
P15 P46
1DNG
45P 35P 2
5P
15P 05P 7
4P
p
7
2
0
2
4C
27pC421
p72224C
p72324C
470R407
p
7
2
4
24
C
074804R
27pC425
4.7K
R409
470R410
p72624C
470R411
p72724C
07
4
2
1
4R
p
728
2
4C
470R413
470R414
100n
C429
27pC430
0
7
4514R
074614R
470R418
p
7
2
1
3
4C
27pC432
27pC433
470R419
470R420
470R421
p72434C
100n
C435
0
R422
074324R
p
726
3
4C
120K
R424
470R425
4.7K
R426
2LOC_
Y
EK
KEY_ROW2
KEY_ROW0
3
LOC_YE
K
KEY_ROW3
KEY_ROW1
OIV
_
2
6V
2
2V62_VIO
2V62_VIO
2V62_VIO
1LOC_YEK
KEY_ROW6
0LOC_YEK
KEY_ROW5
KEY_I2C_SCL
4LOC_YEK
KEY_COL5
KEY_COL6
KEY_COL7
KEY_ROW4
A
DS
_
C2
I_
Y
EK
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 KB410KB411
KB412
KB413
KB414
KB415 KB416
KB417
KB418
KB419
KB420
KB421
KB422
KB423
KB424 KB425
KB426
KB427
KB428KB429 KB430KB431
KB432
KB433
KB434KB435KB436
KB437
KB438 KB439
KB440KB441
KB442KB443KB444
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
MULTISEND
Vol_DOWN
Vol_UPCAM
KEY_ROW6
POWER&LOC
K
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
YR
H
E
F