ra8806 RAIO Technology Inc., ra8806 Datasheet - Page 72

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

Preliminary Version 1.2
RAiO
TECHNOLOGY INC.
6-10-1-3 Full Size Font
There are three types of CGROM in RA8806, i.e. RA8806-S, RA8806-T and RA8806-J. RA8806-S
contains the Simplified Chinese characters with the coding of GB standard. RA8806-T contains the
Traditional Chinese characters with the coding of BIG5 standard. RA8806-J contains the JIS
Japanese Kanji Level 1 & 2 font characters. About the detail, please refer the Appendix D, Appendix
E, and Japanese Kanji font code table (RA8806_DS_V12_Font_JIS.pdf).
The RA8806 displays the Chinese characters in text mode. Key in the Chinese code (GB or BIG5
code) directly , then it will display the Chinese characters in cursor position. If display Chinese ,
RA8806-S accepts the GB code, RA8806-T accepts the BIG-5 code. The Chinese character
occupies two Byes, hence the MPU should write the Chinese code (High Byte & Low Byte) separate
into RA8806 in case the MPU interface is 8-Bit. The English code or numeric code occupies only
one Byte, hence it will write the code into the RA8806 at a time. i.e. for RA8806-T, the BIG-5 code of
character ”世” is “A540”, MPU will send the “A5” and “40” in proper order to RA8806-T, then it will
display the Chinese character of ”世”.
If use the Japanese Kanji font version of RA8806, that is RA8806-J, it should transfer the JIS code
for a start , then the MPU send the code to RA8806-J. Firstly, add 80h to the Hi-Byte of JIS code,
then to judge the Low-Byte, if it is larger or equal to 60h, then adds 40h, otherwise adds 20h. Then it
will display the Japanese Kanji font if the new code sends to RA8806-J by MPU. i.e. the JIS code of
character ”粟” is “3040”, to transfer to the new code is “B060”, to send the “B0” and “60” in proper
order, then it will display the Japanese Kanji font of ”粟”.
The Font ROM of RA8806-J mainly refer to the coding of JIS code, if the user use Shift-JIS code
(called for short S-JIS), then it should be transfered by another procedure, firstly, transfer S-JIS
code to JIS code. It is in common use of S-JIS coding for Japanese computer system, because it
contains the full font and half font of Latin character, Hiragana, Katakana, notation and the
Japanese Kanji font. It is named by Shift_JIS, for put in full font, to avoid put in the 0xA1~0xDF of
the Half-width Katakana.
The Figure 6-43 is the flow chart for the S-JIS code transfers to JIS code and JIS code transfers to
RA8806-J, furthermore the attachment is the program for the user to refer. i.e. the S-JIS code of
character ”粟” is “88BE”, transfers to JIS code is “3040”, as the description above, JIS transfers new
code to “B060”, then send “B0” and “60” in proper order to RA8806-J, it will display the Japanese
Kanji font of ”粟”. i.e. the character ” 甌” of J-JIS code is “E14D”, transfers to JIS code is “612E”, as
the mention above, the JIS transfer new code to “E14E”, then send “E1” and “4E” in proper order to
RA8806-J, in the meantime display the Japanese Kanji font of ” 甌”.
WLCR
Reg.
Bit_Num
Bit 3
Text Mode Selection
Table 6-24
Description
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Two Layers Character/Graphic LCD Controller
Reference
REG[00h]
www.raio.com.tw
RA8806