ra8806 RAIO Technology Inc., ra8806 Datasheet - Page 18

• Manufacturer Part Number: ra8806
• Description: Two Layers Character/graphic Lcd Controller
• Manufacturer: RAIO Technology Inc.

Preliminary Version 1.2
RAiO
REG [20h] Active Window Right Register (AWRR)
Note:
REG[20h, 30h, 40h, and 50h] are used to dominate an active window for line/row changing when writing
data. Users can use these four registers to set the left/right/top/bottom boundary of active window. When
data goes beyond the right boundary of it, the cursor will automatically change the next line to write data. It
will move to the left boundary of new line in active window. When the data comes to the right-bottom corner,
the next write will cause the cursor to move to the left-top corner.
REG [21h] Display Window Width Register (DWWR)
Note:
REG[21h, 31h] are used to set Display Window Resolution. Users can set the viewing scope of Display
Data RAM. Column width (DWWR) of RA8806 can be set between 0h ~ 27h, and Row height (DWHR) can
be set between 0h ~ EFh.
REG [30h] Active Window Bottom Register (AWBR)
REG [31h] Display Window Height Register (DWHR)
TECHNOLOGY INC.
7-6
5-0
7-6
5-0
7-0
Bit
Bit
Bit
Bit
7-0
Reserved
Active Window Right Position
Note: AWRR must be equal or larger then AWLR, and less or equal
then the value 27h (40 in decimal).
Reserved
Set Display Window Width Position
If LCD panel resolution is 320x240, the value of the register is:
Active Window Bottom Position
Note: AWBR must be equal or larger then AWTR, and less or equal
then the value EFh(239 in decimal)
Display Window Height Position
If LCD panel resolution is 320x240, the value of the register is:
Segment-Right = (Segment Number / 8) – 1
( 320 / 8 ) - 1 = 39 = 27h
Common_ Height = LCD Common Number –1
240 – 1 = 239 = EFh
Description
Description
Description
Description
Segment-Right
Common-Bottom
Common- Height
18/184
Segment-Width
Two Layers Character/Graphic LCD Controller
www.raio.com.tw
Default
Default
Default
Default
EFh
27h
27h
EFh
00
00
RA8806
Access
Access
Access
Access
R/W
R/W
R/W
R/W
R
R