ra8803 RAIO Technology Inc., ra8803 Datasheet - Page 36

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

Version 2.5
RAiO
7-3 Graphics Mode
7-4 Blinking and Inverse
TECHNOLOGY INC.
The RA8803/8822 graphics mode is use bit map to fill the data on the Display RAM. The Figure 7-5 is
an example to show how to set graphics mode.
The RA8803 support maximum resolution is 320x240 pixel, therefore it need 9.6Kbyte(320x240/8 =
9600) Display Data RAM(DDRAM) to store each pixel data. The RA8822 support maximum resolution is
240x160 pixel, therefore it need 4.8Kbyte Display Data RAM. Figure 7-6 is an example to show the
DDRAM data mapping to the LCD panel.
The RA8803/8822 provide an Auto-Write feature to fill a data to all of the DDRAM. At first, user write the
data to Register PNTR then initial the Auto-Write function(Register FNCR Bit3). RA8803/8822 will fill the
data to DDRAM in very short time. Normally this feature is used to clear screen or want to fill fixed
pattern or background on screen.
The RA8803/8822 provide whole screen blinking or inverse function. Please refer to the control register
- WLCR at chapter 5-2.
D7 D6 D5 D4 D3 D2 D1 D0
1 1
Display Data RAM
1 0 0 1 1
Figure 7-6: The Mapping of Display Data to LCD Panel
1. Setup REG. WLCR, CG = 0
2. Write bit map to Display Memory directly.
Figure 7-5: Graphics Mode
0
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Two Layers Character/Graphical LCD Controller
0
1
2
Display On LCD
Segment
3
4
5
RA8803/8822
6
7 …..
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