ra8803 RAIO Technology Inc., ra8803 Datasheet - Page 42

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

Version 2.5
RAiO
7-11 Extension Mode for Display
TECHNOLOGY INC.
the value of [page1, page2] could be [0,0], [1,0], [0,1] or [1,1]. Therefore if the display times are different
then you will see the different gray level. Of course you have to speed up the display frame rate and
system clock to get more good quality and to avoid screen flash.
RA8803/8822 support a special display mode – Extension mode. The dual page – page1 and page2 are
show on the bigger panel. This mode is set by the Bit[6:4] of register MAMR. Please refer to Figure 7-14
and 7-15.
If MAMR Bit[6:4]=110b, then RA8803 supports maximum resolution is 640x240 dots and RA8822 is
480x160. The left side of screen shows the Page1 of DDRAM, the right side shows the Page2. Please
refer to Figure 7-14.
If MAMR Bit[6:4]=111b, then RA8803 supports maximum resolution is 320x480 dots and RA8822 is
240x320. The up side of screen shows the Page1 of DDRAM, the down side shows the Page2. Please
refer to Figure 7-15.
Figure 7-14：Extension Mode(1) Register MAMR bit[6:4] = 110h
160
240
Page1
Page1
240
320
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RA8803
RA8822
Two Layers Character/Graphical LCD Controller
240
320
Page2
Page2
RA8803/8822
www.raio.com.tw