Block Diagram - LG LAC5800(R) Service Manual

7-2. BLOCK DIAGRAM

V DD1
V DD2
/INH
OS C
V DD
VSS
7-3. PIN DESCRIPTION
Pin Name I/O
SG1/P1 ~ SG12/P12 O
SG13 ~ SG51 O
COM1 ~ COM4 O
VDD -
VDD1 -
VDD2 -
VSS -
OSC I/O
/INH I
CE I
CLK I
DI I
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
COM1 COM2 COM3 COM4
COMMON
DRIVE R
CLOCK
GEN ERATOR
Segment Driver Output/General Purpose Output Ports
Segment Driver Output Pins
Common Driver Output Pins
Power Supply
Power Supply
This pin is used to apply a 2/3 LCD Drive Bias Voltage.
If the 1/2 Bias Drive Technique is used, this pin must be short to VDD2.
Power Supply
This pin is used to apply a 1/3 LCD Drive Bias Voltage.
If the 1/2 Bias Drive Technique is used, this pin must be short to VDD1.
Ground
Oscillation Input / Output Pin
Display OFF Control Pin
If this pin is set to "LOW" (VSS), the display is forced to turn OFF. Output
driver pins -- SG1/P1 to SG12/P12, SG13 to SG51, COM1 to COM4 are
set to "LOW". If this pin is set to "HIGH" (VDD), the display is turned ON.
(see Note)
Chip Enable Pin
Clock Input Pin
Data Input Pin
S G51 S G50 S G13 S G12/P12
SE GME NT DR IV ER & LATCH
S HIFT REGIST ER
ADD RESS
DETECTOR
D I CLK CE
Pin Description
2-27
SG2/P2 SG1/P1
Pin No.
1 ~ 12
13 ~ 51
52 ~55
56
57
58
59
60
61
62
63
64
LGE Internal Use Only