ra8806 RAIO Technology Inc., ra8806 Datasheet - Page 102
ra8806
Manufacturer Part Number
ra8806
Description
Two Layers Character/graphic Lcd Controller
Manufacturer
RAIO Technology Inc.
Datasheet
1.RA8806.pdf
(184 pages)
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Preliminary Version 1.2
RAiO
TECHNOLOGY INC.
Note that the extension mode is only display the combination of the DDRAM1 and DDRAM2 data. The
cursor movement or characters display is not continuous across them. So user must set two pages
separately on the screen. The RA8806 will combine the DDRAM1 and DDRAM2 data as a single display
in extension mode. So, there is some limitation on Extension Mode. For example, if RA8806 set to
Extension Mode(1) as Figure 6-68 for 640x240 dots panel. The data have to write into DDRAM1 and
DDRAM2. But the cursor moving of Common is not from 0 to 639. The users have to separate the
screen into 2 blocks and write data into DDRAM1 and DDRAM2 to create a complete 640x240 dots
picture. The Figure 6-70 shows the description.
Of course, if use Horizontal Scrolling, then the screen is like the following Figure 6-71.
Figure 6-69 : Extension Mode(2) Register MAMR Bit[6:4] = 111h
Figure 6-70:Extension Mode(1) Cursor Moving
240
240
DDRAM1
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:
DDRAM1
DDRAM2
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Data
Data
320
Two Layers Character/Graphic LCD Controller
DDRAM2
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www.raio.com.tw
RA8806
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