HD66712 Datasheet, PDF (70/88 Pages) Hitachi Semiconductor – Dot-Matrix Liquid Crystal Display Controller/Driver

HD66712U
Horizontal Dot Scroll
Dot unit scrolls are performed by setting the horizontal dot scroll quantity resister (HDS) when the
extension register is enabled (RE = “1”). And the shifted line can be selected with the scroll enable
register (HDE). So, it can control dot unit shifts by each display line.
To scroll smoothly, HD66712 supports 6 dots-font width mode (FW = 1). The below figures are examples
of scroll display.
When 5-dots font width (FW = 0)
No shift performed
One dot shift to the left
Two dots shift to the left
Three dots shift to the left
Four dots shift to the left
When 6-dots font width (FW = 1)
No shift performed
One dot shift to the left
Two dots shift to the left
Three dots shift to the left
Four dots shift to the left
Five dots shift to the left
Example of 10 digits × 4 lines with 6-dots fonts width mode
ICON mark and 1st to 3rd line are fixed,
and only 4th line is sifted
HDS = 1000
(4th line scroll enable)
Figure 31 Example of Dot Scroll Display
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