hd66717 Renesas Electronics Corporation., hd66717 Datasheet - Page 32

• Manufacturer Part Number: hd66717
• Description: Low-power Dot-matrix Liquid Crystal Display Controller/driver -
• Manufacturer: Renesas Electronics Corporation.

HD66717
Contrast Control
The contrast control instruction (Figure 14) includes the SN and CT bits.
SN2: Combined with the SN1 and SN0 bits described in the Scroll Control section to select the first line
to be scrolled (display-start line).
CT3–CT0: Controls the LCD drive voltage (potential difference between V
(Figure 15 and Table 12). Refer to the Contrast Adjuster section.
484
Figure 14 Contrast Control Instruction
RS R/W DB7
0
Figure 15 Contrast Adjuster
0
0
V
V
V1
V2
V3
V4
V5
CC
EE
1
VR
R
R
R
R
R
R
R
0 SN2 CT3 CT2 CT1 CT0
HD66717
+
–
+
–
+
–
+
–
+
–
DB0
CC
and V5) to adjust contrast