ra8806 RAIO Technology Inc., ra8806 Datasheet - Page 70

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

Preliminary Version 1.2
RAiO
6-10 Display Function
TECHNOLOGY INC.
6-10-1 Character/Graphic Mode
6-10-1-1 Graphic Display
There are two modes for MPU to write data to RA8806, i.e., character mode and graphic mode. In
graphic mode, data is written directly to DDRAM in bit-map format. In character mode, data is
written in code format, the font bit-map in the CGROM will be written to DDRAM by this way.
RA8806 stores two different sizes of characters in its font ROM - 1) half size font(8x16 pixels), 2) full
size font(16x16). Figure 6-40 shows the examples.
The RA8806 graphics mode is use bit map to fill the data on the DDRAM. The Figure 6-41 is an
example to show how to set graphics mode.
The RA8806 support maximum resolution is 320x240 pixels, therefore it need 9.6Kbyte(320x240/8 =
9600) Display Data RAM(DDRAM) to store each pixel data. Figure 6-42 is an example to show the
DDRAM data mapping to the LCD panel.
Figure 6-40 : Full Size and Half Size Font
16X16 font
16X16 font
1. Setup Register WLCR, TEXT_MD = 0
2. Write bit map to Display Data Memory directly.
Figure 6-41 : Graphics Mode
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Two Layers Character/Graphic LCD Controller
8X16 font
8X16 font
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RA8806