HD66727 Datasheet, PDF (35/97 Pages) Hitachi Semiconductor – Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver with Key Scan Function

RS R/W DB7
0001
DB0
0 SN2 CT3 CT2 CT1 CT0
Figure 15 Contrast Control Instruction
HD66727
V_CC
R
+
V2 ^R
–
+
R
–
V3 ^R
+
R
–
+
R
–
+
–
VR
V_EE
Figure 16 Contrast Adjuster
Table 16 CT Bits and Variable Resistor Value of Contrast Adjuster
CT3
CT2
CT1
CT0
Variable Resistor Value (VR)
0
0
0
0
6.4 x R
0
0
0
1
6.0 x R
0
0
1
0
5.6 x R
0
0
1
1
5.2 x R
0
1
0
0
4.8 x R
0
1
0
1
4.4 x R
0
1
1
0
4.0 x R
0
1
1
1
3.6 x R
1
0
0
0
3.2 x R
1
0
0
1
2.8 x R
1
0
1
0
2.4 x R
1
0
1
1
2.0 x R
1
1
0
0
1.6 x R
1
1
0
1
1.2 x R
1
1
1
0
0.8 x R
1
1
1
1
0.4 x R
HD66727
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