hd66717 Renesas Electronics Corporation., hd66717 Datasheet - Page 33

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

Scroll Control
The scroll control instruction (Figure 16) includes the SN and SL bits.
SN1, SN0: Combined with the SN2 bit described in the Contrast Control section to select the top line to
be displayed (display-start line) through the data output from the COM1 pin (Table 13). After first five
lines are displayed from the top line, the cycle is repeated and scrolling continues.
Table 12
CT3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
CT2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
CT Bits and Variable Resistor Value of Contrast Adjuster
CT1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
CT0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Figure 16 Scroll Control Instruction
RS R/W DB7
Variable Resistor Value (VR)
6.4 x R
6.0 x R
5.6 x R
5.2 x R
4.8 x R
4.4 x R
4.0 x R
3.6 x R
3.2 x R
2.8 x R
2.4 x R
2.0 x R
1.6 x R
1.2 x R
0.8 x R
0.4 x R
0
0
0
1
1 SN1 SN0 SL2 SL1 SL0
DB0
HD66717
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