ra8803 RAIO Technology Inc., ra8803 Datasheet - Page 24

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

Version 2.5
RAiO
5-3 Registers for Display Resolution
REG [F1h] Font Size Control Register (FVHT)
TECHNOLOGY INC.
Normally the REG[40h], REG[50h], REG[41h] and REG[51h] set to ”00h”. And the content of REG[20h],
REG[30h], REG[21h] and REG[31h] are depend on the resolution of LCD module. The following are
reference table of different LCD module.
5-4
1-0
7-6
5-4
3-0
Bit
3
2
Set Character Horizon Size
0 0 : One Time
0 1 : Two Times
1 0 : Three Times
1 1 : Four Times
Set Character Vertical Size
0 0 : One Time
0 1 : Two Times
1 0 : Three Times
1 1 : Four Times
0 : Select upper part of 256KB ROM
Select Font ROM Type
0 0 : Select GB font ROM (256KB, Mode0)
0 1 : Select BIG5 font ROM (512KB, Mode1)
1 0 : Support GB font ROM (512KB, Mode2)
Fill PNTR Data to DDRAM
1 : Fill Data to DDRAM Enable
0 : No Action
When this bit is “1”, RA8803/8822 will automatically read
PNTR data, and fill it to DDRAM (Range:[AWLR, AWTR] ~
[AWRR, AWBR]), and then this bit will be cleaned to “0”.
ASCII Code Selection
1 : All input data will be decoded as ASCII (00~FFh)
0 : The RA8803/8822 will check the first byte data first. If the
first byte is 00~9Fh then regarded as ASCII (Half-size). If first
byte is A0~FFh then regarded as GB/BIG5 (Full-size).
ASCII Blocks Select
0 0 : Map to ASCII block 0, Latin_1
0 1 : Map to ASCII block 1, Latin_2
1 0 : Map to ASCII block 2, Latin_3
1 1 : Map to ASCII block 3, Latin_4
Reserved
Description
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Two Layers Character/Graphical LCD Controller
Graph
Text
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RA8803/8822
Default
www.raio.com.tw
0h
0h
Fh
1h
0h
0h
2h
(Auto Clear)
Access
R/W
R/W
R/W
R/W
R/W
R/W
R/W