ra8803 RAIO Technology Inc., ra8803 Datasheet - Page 38

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

Version 2.5
RAiO
7-6 Display Window and Active Window
TECHNOLOGY INC.
The RA8803/8822 provides two windows for real application -- Display Window and Active Window. The
Display Window is the actual resolution of LCD panel. Active is a sub-window in Display Window. The
boundary of cursor shift depends on the active window.
For RA8803, if LCD panel resolution is 320x240 pixel then the display window size is 320x240. We can
create an active window in the display window like Figure 7-9. This figure show the display size is
320x240, and a 160x160 active window is on the upper-middle.
In text mode, RA8803/8822 provide two widths for selection. If Register WCCR bit0 -- CSD = 0, the
cursor width fixed to one byte(8 pixel). If CSD =1, the cursor width is depend on the previous
character. If user sends a full size Chinese character, then the cursor width will become 2byte
width(16 pixel). If user shows a half size character then the cursor width will change to one byte(8
pixel).
159
160
239
Figure 7-9: RA8803 Display Window and Active Window
0
1
2
:
:
:
:
:
:
:
:
:
:
0 1 2 …………79 80……………………………...239 240.………319
1 Pixel
80
2 Pixel
Figure 7-8: Cursor Height
Active Window
80
160 x 160
320
38/48
3 Pixel
Two Layers Character/Graphical LCD Controller
Display Window
320 x 240
80
16 Pixel
240
RA8803/8822
www.raio.com.tw