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SC802A
VER2.1
Akihabara Inc. www.akiba-tech.com
Page 8 of 8
RAM's address and the LCD's position shown bellows.
Display Character address code:
Display position
1
2
3
4
5
6
7
8
00
01
02
03
04
05
06
07
DDRAM Address
40
41
42
43
44
45
46
47
Relationship between Character Code (DDRAM) and character Pattern (CGRAM)
Character code DD RAM Data
CG RAM Address
Character Pattern CG RAM Data
B7
B6
B5
B4
B3
B2
B1
B0
B5
B4
B3
B2
B1
B0
B7
B6
B5
B4
B3
B2
B1
B0
000
1
1
1
1
1
0
0
1
0
0
1
00
0
1
0
0
0
1
00
0
1
1
0
0
1
00
1
0
0
0
0
1
00
1
0
1
0
0
1
00
1
1
0
0
0
1
00
0
0
0
0
x
0
0
0
0
0
0
111
x
x
x
0
0
0
0
0
000
0
1
1
1
0
0
0
1
0
0
1
00
0
1
0
0
0
1
00
0
1
1
0
0
1
00
1
0
0
0
0
1
00
1
0
1
0
0
1
00
110
0
1
1
1
0
0
0
0
0
x
0
0
1
0
0
1
111
x
x
x
0
0
0
0
0
1.
▆ It means that the bit0~2 of the character code correspond to the bit3~5 of the CG RAM address.
2.
▆ these areas are not used for display, but can be used for the general data RAM.
3. When all of the bit4-7 of the character code is 0, CG RAM character patterns are selected.
4. " 1 ": Selected," 0 ": No selected," X": Do not care (0 or 1).
5. for example (1), to set character code (b2 = b1 = b0 = 0, b3 = 0 or 1, b7-b4 = 0) is to display" T". That
means character code (00)16, and (08)16 can display" T” character.
6. The bits 0-2 of the character code RAM is character pattern line position. The 8th line is the cursor
position and display is formed by logical OR with the cursor
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