NEC mPD780973 Series Preliminary User's Manual page 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
LIPS
(= 1)
V
LC0
V
LC1
V
LCD
V
LC2
V
SS
(b) To supply LCD drive voltage from external source
LIPS
(= 0)
V
LC0
V
LC1
V
LCD
V
LC2
V
SS
3R • r
V =
LCD
3R • r + 3R • r
2
V
DD
P-ch
Open V pin
LCD
R
R
R
V
SS
V = V
LCD DD
V
DD
P-ch
V
LCD
R
R
R
V
SS
2
× V
DD
• r
+ r
1 1 2
DD
V
DD
r
1
r
2
V
SS
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