hd66740 Renesas Electronics Corporation., hd66740 Datasheet - Page 28

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

HD66740
Table 12
SL2
0
0
0
0
1
1
1
1
PS1–0: Specify PS1 to PS0 bits when SW = 1.
in vertical smooth scrolling, and the other display lines are smooth-scrolled. When PS1–0 = 10, the first
and second lines are fixed-displayed.
For details, see the Partial Smooth Scroll Display Function section.
LCD-Driving-Pattern Control
B/C: When SW=1 and B/C=0, a B-pattern waveform is generated and alternates in every frame for LCD
drivin. When B/C=1, a C-pattern wavefrom is generated and alternates (n-raster-row reversed AC
drive) in each raster-row specified by bits EOR and NW4-NW0 in the LCD-driving-waveform control
register. For details,
DCC: When SW=1 and DCC=0, a booster operates with the 64-divided clock of the operating frequency.
When DCC=1, the booster operates with the 32-divided clock. When the booster operates with the
64-divided clock, current consumptionin the booster is low, but boosting ability is weak.
LCD-Driving-Waveform Control
EOR: When the C-pattern waveform is set (B/C = 1) and SW = 1 and EOR = 1, the odd/even frame-select
signals and the n-raster-row reversed signals are EORed for alternating drive. EOR is used when the
LCD is not alternated by combining the set values of the LCD drive duty ratio and n raster-row.
details, see the n-raster-row Reversed AC Drive section.
NW4–0: Specify the number of raster-rows n that will alternate at the C-pattern waveform setting (B/C =
1).
selected.
can be set.
NW4–NW0 alternate in every set value + 1 raster-row, and the first to the 32nd raster-rows can be
When SW = 0, bits NW2, NW1, and NW0 can be set.
SL1
0
0
1
1
0
0
1
1
SL Bits and Display-start Raster-row
R/W RS DB7
Figure 10a
0
see the n-raster-row Reversed AC Drive section.
SL0
0
1
0
1
0
1
0
1
0
0
LCD-Driving-Waveform Control Instruction
DB6 DB5 DB4 DB3 DB2 DB1
Display-start Raster-row
1st raster-row
2nd raster-row
3rd raster-row
4th raster-row
5th raster-row
6th raster-row
7th raster-row
8th raster-row
1
When PS1–0 = 11, the first to third lines are fixed-displayed.
1
1
When PS1–0 = 01, only the first line is fixed-displayed
28
0
0
DCC B/C
When SW = 1, bits NW4 and NW3
DB0
(SW = 1)
For