Boosting The Lcd Drive Power Supply - Renesas H8/38024 Hardware Manual

13.3.4

Boosting the LCD Drive Power Supply

When a large panel is driven, the on-chip power supply capacity may be insufficient. If the power
supply capacity is insufficient when V
must be reduced. This can be done by connecting bypass capacitors of around 0.1 to 0.3 µF to
pins V to V , as shown in figure 13.9, or by adding a split-resistance externally.
1 3
V
CC
This LSI
V
SS
Rev. 6.00, 08/04, page 422 of 628
is used as the power supply, the power supply impedance
CC
V
1
V
2
V
3
Figure 13.9 Connection of External Split-Resistance
R
R = several kΩ to
R
several MΩ
R
R
C = 0.1 to 0.3 µF