EM78R911 Ver la hoja de datos (PDF) - ELAN Microelectronics
Número de pieza
componentes Descripción
Fabricante
EM78R911 Datasheet PDF : 37 Pages
| |||
EM78911
8-bit micro-controller
VII.11.4 LCD Bias control
IOCE (Bias Control Register)
7
6
5
4
3
2
1
0
Bias3 Bias2 Bias1
* Bit 2~4 (Bias1~Bias3) Control bits used to choose LCD operation voltage . The circuit can refer ti figure15.
LCD operate voltage Vop (VDD 5V)
VDD=5V
000
0.60VDD
3.0V
001
0.66VDD
3.3V
010
0.74VDD
3.7V
011
0.82VDD
4.0V
100
0.87VDD
4.4V
101
0.93VDD
4.7V
110
0.96VDD
4.8V
111
1.00VDD
5.0V
* Bit 5~7 unused
78810/78910
Vdd
R
V1
R
8.2R
Vop
V2
R
V3
R
Vlcd
000
001
0.4R
010
0.4R
Vop=Vdd-Vlcd
R=1K
Bias3~1 MUX
:
:
011
0.3R
100
0.3R
101
0.2R
110
0.1R
Vss
111
0.1R
Fig.18 LCD bias circuit
27
Share Link: 