HD66717 Datasheet, PDF (29/90 Pages) Hitachi Semiconductor – (Low-Power Dot-Matrix Liquid Crystal Display Controller/Driver)

HD66717
Display On/Off Control
The display on/off control instruction (Figure 11) includes DC, DS, and LC bits.
DC: The character display is on when DC is 1 and off when DC is 0. When off, the display data remains
in DDRAM, and can be displayed instantly by setting DC to 1.
DS: When DS = 1, segment display for icons and marks that is controlled by the multiplexing drive
method is turned on and when DS = 0, it is turned off.
When both DC and DS = 0, multiplexing drive is halted, setting the outputs from SEG1 to SEG60, COM1
to COM32, and COMS1 and COMS2 to V_CC level to turn off the display. This can suppress current for
LCD charging or discharging due to LCD driving operations.
LC: When LC = 1, a cursor attribute is assigned to the line that contains the address counter (AC) value.
Cursor mode can be selected with the B/W, C, and B bits. Refer to the Line-Cursor Display section.
Alternating display
(every 32 frames)
i) White-black inverting display example
ii) 8th raster-row
cursor display
Alternating
display
ii) Blink display example
Figure 10 Cursor Control Examples
RS R/W DB7
DB0
0 0 0 0 0 1 0 DC DS LC
Figure 11 Display On/Off Instruction
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