External Resistance Division Method - NEC Renesas mPD71312 User Manual

3.9.2 External resistance division method

It is also possible to use external voltage divider resistors for generating LCD drive power supplies, without using
internal resistors. Figure 3-26 shows examples of LCD drive voltage connection, corresponding to each bias method.
Figure 3-26. Examples of LCD Drive Power Connections (External Resistance Division Method)
(a) Static display mode
(
V = V
LCD
V
LC0
V
LC1
V
LC2
LV
SS
(c) 1/2 bias method
V
LC0
V
LC1
V
LC2
LV
SS
Remark Both (a) and (b) connection can be used in the static display mode.
48
CHAPTER 3 LCD CONTROLLER/DRIVER
)
= V = V
LC0 LC1 LC2
V
LCD
V
LCD
R
R
User's Manual U18438EJ2V0UD
(b) Static display mode
(
V = V = LV = GND
LC1 LC2 SS
V
LC0
V
LC1
V
LC2
LV
SS
(d) 1/3 bias method
V
LC0
V
LC1
V
LC2
LV
SS
)
V
LCD
V
LCD
R
R
R