ra8803 RAIO Technology Inc., ra8803 Datasheet - Page 17

• Manufacturer Part Number: ra8803
• Description: Two Layers Character/graphic Lcd Controller Specification
• Manufacturer: RAIO Technology Inc.

Version 2.5
RAiO
REG [20h] Active Window Right Register (AWRR)
Note: REG [20h, 30h, 40h, 50h] are used for the function of change the line and page. Users can use these
four Registers to set a block as an active window. When data goes beyond the right boundary of active
window (The value is set by REG [20h, 30h, 40h, 50h]), then the cursor will automatically change the line
and write in data continuously. It means the cursor will move to the left boundary of active window, which is
set by REG [40h]. When the data comes to the bottom line of the right side (set by REG [20h and 30h]),
then the cursor will be moved to the first line of the left side automatically and continue to put in data. (set by
REG [40h, 50h]).
REG [30h] Active Window Bottom Register (AWBR)
REG [40h] Active Window Left Register (AWLR)
REG [50h] Active Window Top Register (AWTR)
REG [21h] Display Window Right Register (DWRR)
Note: REG[21h, 31h, 41h, 51h] are used to set Display Window Resolution. Users can set the viewing
scope of Display RAM. Column Address of RA8803 can be set between 0~27h, and Row Address can be
set between 0~EFh. Column Address of RA8822 can be set between 0~1Dh, and Row Address can be set
between 0~9Fh. Users can set start and end address first, and then by adding shift function to present the
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7-6
5-0
7-0
7-6
5-0
7-0
7-6
5-0
Bit
Bit
Bit
Bit
Bit
Active Window Top Position
Set Display Window Right Position
RA8803: If LCD panel resolution is 320*240, the value of the register
is:
Reserved
Active Window Right Position
Active Window Bottom Position
Reserved
Active Window Left Position
Reserved
RA8822: If LCD panel resolution is 240*160, the value of the register
is:
Segment-Right = (Segment Number / 8) – 1
( 320 / 8 ) - 1 = 39 = 27h
( 240 / 8 ) - 1 = 29 = 1Dh
Description
Description
Description
Description
Description
Common-Top
Segment-Left
Segment-Right
Common-Bottom
17/48
Segment-Right
Two Layers Character/Graphical LCD Controller
RA8803/8822
Default
Default
Default
Default
Default
EFh
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27h
27h
0h
0h
0h
0h
0h
Access
Access
Access
Access
Access
R/W
R/W
R/W
R/W
R/W
R/W
R
R