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Chapter 17
LCD
<1> In the case of generating the drive voltage outside the LSI
Supply each voltage described in Table:17.3.2 to VLC1, VLC2 and VLC3.
Figure:17.3.1 shows the connection with the external resistors, and each capacitor should be 0.1 µF.
Pin Name
VLC1
VLC2
VLC3
V
: LCD drive voltage, the maximum voltage supplied to LCD panel.
LCD
XVII - 20
Operation
Table:17.3.2 Voltage level of VLC1/VLC2/VLC3
Voltage Level
V
V
LC1
LCD
V
LC2
V
V
LC3
SS
(a)Static(V
= V
)
DD30
LCD
(b)1/2duty,1/2bias(V
DD30
(c)1/3duty to 1/8duty 1/3bias(V
Figure:17.3.1 Connection Examples of LCD Power Supply
(when using external voltage dividing resistor)
Static
+ V
V
+ V
SS
LCD
1/2V
LCD
VDD30
C
VLC1
VLC2
VLC3
VSS
= V
)
LCD
VDD30
VLC1
R
VLC2
VLC3
R
VSS
= V
)
DD30
LCD
VDD30
C
VLC1
R
C
VLC2
R
C
VLC3
R
VSS
1/2-bias
1/3-bias
V
+ V
SS
LCD
+ V
2/3V
SS
LCD
1/3V
LCD
V
input
DD30
V
input
DD30
C
C
V
input
DD30
SS
+ V
SS
+ V
SS
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