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LCD CONTROLLER/DRIVER S3C8245/P8245/C8249/P8249
14-12
LCD VOLTAGE DRIVING METHOD
By Voltage Booster
For run the voltage booster
— Make enable the watch timer for f
booster
— Set LCON.2 to "0" and LCON.1 to "1" for make enable voltage booster
— Recommendable capacitance value is 0.1 uF (CAB, C0, C1, C2)
By Voltage Dividing Resistors (Externally)
For make external voltage dividing resistors
— Make enable the watch timer
— Set LCON.2 to "1" and LCON.1 to "0" for make disable voltage booster
— Make floating the CA and CB pin
— Recommendable R = 100 kΩ
V
DD
V
LC2
V
LC1
V
LC0
V
SS
2 x R
R
R
R
V
DD
V
LC2
V
LC1
V
LC0
V
SS
R
R
R
Static and 1/3 Bias (V
LCD
= 3 V at V
DD
= 5 V) 1/2 Bias (V
LCD
= 3.3 V at V
DD
= 5 V)
V
DD
V
LC2
V
LC1
V
LC0
V
SS
R
R
R
Static and 1/3 Bias (V
LCD
= 5 V at V
DD
= 5 V)
NOTE:
3.0 V
≤
V
LCD
≤
5.5 V
Figure 14-10. Voltage Dividing Resistor Circuit Diagram