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199
CHAPTER 16 LCD CONTROLLER/DRIVER
Figure 16-8. Example of Connection of LCD Drive Power Supply
(a) To supply LCD drive voltage from V
DD
V
DD
V
SS
V
LCD
= V
DD
P-ch
LIPS
(= 1)
R
R
R
V
SS
V
LC2
V
LC1
V
LC0
V
LCD
Open V
LCD
pin
(b) To supply LCD drive voltage from external source
V
DD
V
LCD
V
DD
r
1
r
2
V
SS
V
SS
V
LCD
=
×
V
DD
P-ch
LIPS
(= 0)
R
R
R
V
SS
V
LC2
V
LC1
V
LC0
V
LCD
3R
•
r
2
3R
•
r
2
+ 3R
•
r
1
+ r
1
•
r
2
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