hd66740 Renesas Electronics Corporation., hd66740 Datasheet - Page 56

• Manufacturer Part Number: hd66740
• Description: 112 X 80-dot Graphics Lcd Controller/driver - Hitachi Semiconductor
• Manufacturer: Renesas Electronics Corporation.

HD66740
(BS2–0 = 101)
(BS2–0 = 000)
v) 1/6 bias
i) 1/ 10 bias
VR
2R
VR
6R
R
R
R
R
VLCD
GND
R
VLCD
R
R
R
GND
GND
GND
V1
V2
V3
V4
V5
V1
V2
V3
V4
V5
(BS2–0 = 001)
Figure 28
ii) 1/ 9.5 bias
(BS2–0 = 110)
v) 1/5 bias
5.5R
VR
VR
R
R
R
R
R
VLCD
R
R
R
GND
VLCD
R
GND
Liquid Crystal Display Drive Bias Circuit
GND
GND
V1
V2
V3
V4
V5
V1
V2
V3
V4
V5
(BS2–0 = 010)
(BS2–0 = 111)
iii) 1/ 9 bias
vi) 1/ 4 bias
VR
5R
VR
R
R
R
R
VLCD
GND
VLCD
R
R
R
R
GND
56
GND
V3,V4
GND
V1
V2
V3
V4
V5
V1
V2
V5
(BS2–0 = 011)
iv) 1/ 8 bias
VR
4R
VLCD
R
R
R
R
GND
Note: R = Reference resistor
GND
V1
V2
V3
V4
V5
(BS2–0 = 100)
v) 1/7 bias
VR
3R
R
R
R
R
VLCD
GND
GND
V1
V2
V3
V4
V5