HD66760 Datasheet, PDF (25/105 Pages) Hitachi Semiconductor – 104 X 80-dot Graphics LCD Controller/Driver for 256 Colors

HD66760
Table 17 G Bits and Variable Registor Value of Contrast Adjuster
CT Set Value
CT5
CT4
CT3
CT2
CT1
CT0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
0
1
0
0
0
0
0
1
1
0
0
0
1
0
0
•
•
1
1
1
1
0
1
1
1
1
1
1
0
1
1
1
1
1
1
Variable Resistor (VR)
CT6 = 0
CT6 = 1
6.20 × R
3.20 × R
6.15 × R
3.15 × R
6.10 × R
3.10 × R
6.05 × R
3.05 × R
6.00 × R
3.00 × R
•
•
•
•
3.15 × R
0.15 × R
3.10 × R
0.10 × R
3.05 × R
0.05 × R
VR2–0: These bits adjust the output voltage (V1REF) in the LCD drive reference generator in the range of
four- to 11-times of Vreg (1/2Vci or VREG pin input voltage).
Table 18 VR Bits and V1REF Voltage
VR2
VR1
VR0
V1REF Voltage Setting
0
0
0
Vreg × 4-times
0
0
1
Vreg × 5-times
0
1
0
Vreg × 6-times
0
1
1
Vreg × 7-times
1
0
0
Vreg × 8-times
1
0
1
Vreg × 9-times
1
1
0
Vreg × 10-times
1
1
1
Vreg × 11-times