HD66750 Datasheet, PDF (22/96 Pages) Hitachi Semiconductor – 128 x 128-dot Graphics LCD Controller/Driver with Four-grayscale Functions

HD66750/1
Driver Output Control
CMS: Selects the output shift direction of a common driver. When CMS = 0, COM1/128 shifts to COM1,
and COM128/1 to COM128. When CMS = 1, COM1/128 shifts to COM128, and COM128/1 to COM1.
Output position of a common driver shifts depending on the CN bit setting.
SGS: Selects the output shift direction of a segment driver. When SGS = 0, SEG1/128 shifts to SEG1, and
SEG128/1 to SEG128. When SGS = 1, SEG1/128 shifts to SEG128, and SEG128/1 to SEG1.
CN: When CN = 1, the display position is shifted down by 32 raster-rows and display starts from COM33.
When the liquid crystal is driven at a low duty ratio in the system wait state, it can be partially displayed at
the center of the screen. For details, see the Partial-display-on Function section.
NL3-0: Specify the LCD drive duty ratio. The duty ratio can be adjusted for every eight raster-rows.
CGRAM address mapping does not depend on the setting value of the drive duty ratio.
R/W RS DB15 DB14 DB13 DB12 DB11 DB10 DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 1 * * * * * * CMS SGS * CN * * NL3 NL2 NL1 NL0
Figure 4 Driver Output Control Instruction
Table 6 NL Bits and Drive Duty
NL3 NL2 NL1 NL0 Display Size
0
0
0
0
128 x 8 dots
0
0
0
1
128 x 16 dots
0
0
1
0
128 x 24 dots
0
0
1
1
128 x 32 dots
0
1
0
0
128 x 40 dots
0
1
0
1
128 x 48 dots
0
1
1
0
128 x 56 dots
0
1
1
1
128 x 64 dots
1
0
0
0
128 x 72 dots
1
0
0
1
128 x 80 dots
1
0
1
0
128 x 88 dots
1
0
1
1
128 x 96 dots
1
1
0
0
128 x 104 dots
1
1
0
1
128 x 112 dots
1
1
1
0
128 x 120 dots
1
1
1
1
128 x 128 dots
LCD Drive Duty
1/8 Duty
1/16 Duty
1/24 Duty
1/32 Duty
1/40 Duty
1/48 Duty
1/56 Duty
1/64 Duty
1/72 Duty
1/80 Duty
1/88 Duty
1/96 Duty
1/104 Duty
1/112 Duty
1/120 Duty
1/128 Duty
Common Driver Used
COM1ÐCOM8
COM1ÐCOM16
COM1ÐCOM24
COM1ÐCOM32
COM1ÐCOM40
COM1ÐCOM48
COM1ÐCOM56
COM1ÐCOM64
COM1ÐCOM72
COM1ÐCOM80
COM1ÐCOM88
COM1ÐCOM96
COM1ÐCOM104
COM1ÐCOM112
COM1ÐCOM120
COM1ÐCOM128
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