Keypad Switching & Scanning - LG KC780 Service Manual

LCD_PWM
DTX3
DTX1
DTX0
DIF_VSYNC
DIF_RD
DIF_WR
DIF_CD
DIF_CS
DIF_D(15)
DIF_D(14)
DIF_D(13)
DIF_D(12)
DIF_D(11)
DIF_D(10)
DIF_D(9)
DIF_D(8)
DIF_D(7)
DIF_D(6)
DIF_D(5)
DIF_D(4)
DIF_D(3)
DIF_D(2)
DIF_D(1)
DIF_D(0)
LCD_ID
DIF_RESET
MLED5
MLED4
MLED3
MLED2
MLED1
MLED
EVLC14S02050
3.9. Keypad Switching & Scanning
The keypad interface is a peripheral which can be used for scanning keypads up to 5 rows (outputs from
Port Control Logic) and 6 columns (inputs to PCL). The number of rows and columns depend on settings
of the PCL.
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
37PIN LCD Connector
VIO_2V62
R701
10K
EVLC14S02050
VA707 VA709
EVLC14S02050
Figure 13 37pin LCD connector circuit
VIO_2V62
VA710 EVLC14S02050
C702 C703
0.1u DNI
- 43 -
3. TECHNICAL BRIEF
CN701
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
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24
25
26
27
28
29
30
31
32
33
34
35
36
37
EVLC14S02050 EVLC14S02050
VA712
VA711
LGE Internal Use Only