LCD CONTROLLER/DRIVER S3C8245/P8245/C8249/P8249

14-12

LCD VOLTAGE DRIVING METHODBy Voltage BoosterFor run the voltage boosterMake enable the watch timer for fboosterSet LCON.2 to "0" and LCON.1 to "1" for make enable voltage boosterRecommendable capacitance value is 0.1 uF (CAB, C0, C1, C2)By Voltage Dividing Resistors (Externally)For make external voltage dividing resistorsMake enable the watch timerSet LCON.2 to "1" and LCON.1 to "0" for make disable voltage boosterMake floating the CA and CB pinRecommendable R = 100 k
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