EM65571 ELAN Microelectronics Corp, EM65571 Datasheet - Page 96

• Manufacturer Part Number: EM65571
• Description: 130com / 128seg 65k Color Stn Lcd Driver
• Manufacturer: ELAN Microelectronics Corp

EM65571
130COM/128SEG 65K Color STN LCD Driver
90 x
The relationship between V0 and DV setting values (when Vref = 1.5V) is shown below:
The DV register can control the VBA voltage.
The DV register has 7 bits, so a 113 level voltage can be selected.
The output voltage at VBA is specified by equation (1).
where
The LCD driver voltage V0 is determined by the VBA level and the RM register value in
equation (2).
where
DV6
V0
0
0
1
1
Offset: CV1~CV4 setting
VREF: internal temperature compensation output voltage
VBA ranges from 1.5V to 2V at 25 qC
20
19
18
17
16
15
14
13
12
11
10
VBA
N : RM register setting
9
8
7
6
5
4
M: DV register value
0
V
DV5
0
0
0
1
1
ª
« ¬
1
16
VBA

M
DV4
0
0
1
1
u

32
381
N
Offset
V0 vs DV (Vref=1.5V)
DV3
1
1
0
1
j
j
48
º
» ¼
u
VREF
DV2
DV
64
0
0
1
0
(This specification is subject to change without further notice)
80
DV1
0
0
1
0
Product Specification (V1.0) 08.04.2005
96
DV0
0
1
1
0
112
Output Voltage
120 (Larger)
8 (Smaller)
(2)
(1)
j
j
j
j
RM=9.5
RM=8.9
RM=8.5
RM=8.0
RM=7.5
RM=6.0
RM=4.5
RM=3