hd66740 Renesas Electronics Corporation., hd66740 Datasheet - Page 20

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

HD66740
Table 6
CT Set Value
CT5
0
0
0
0
0
0
1
1
1
1
1
1
BT1-0: When SW = 1, they switch the output of V5OUT between triple, quadruple, and five-times boost.
The liquid crystal display drive voltage level can be selected according to its drive duty ratio and bias.
A lower amplification of the booster consumes less current.
BS2-0: When SW = 1, they set the crystal display drive bias value within the range of 1/4 to 1/10 bias.
The liquid crystal display drive bias value can be selected according to its drive duty ratio and voltage.
For details, see the Liquid Crystal Display Drive Bias Selector section.
Table 7
BT1
0
0
1
1
CT4
0
0
0
0
0
1
0
0
0
1
1
1
CT Bits and Variable Resistor Value of Contrast Adjuster
BT Bits and Output Level
BT0
0
1
0
1
CT3
0
0
0
0
0
1
0
0
0
1
1
1
CT2
0
0
0
0
1
•
•
1
0
0
0
•
•
1
1
1
V5OUT Output Level
Triple boost
Quadruple boost
Five-times boost
Setting inhibited
CT1
0
0
1
1
0
1
0
0
1
0
1
1
20
CT0
0
1
0
1
0
1
0
1
0
1
0
1
Variable Resistor (VR)
3.20 x R
3.15 x R
3.10 x R
3.05 x R
3.00 x R
1.65 x R
1.60 x R
1.55 x R
1.50 x R
0.15 x R
0.10 x R
0.05 x R
•
•
•
•