ST7920
DDRAM data
(char. code)
CGRAM CGRAM data CGRAM data
Addr. (higher byte) (lower byte)
B B B B B B B B B B D D D D D D D D D D D D D D D D
B15~ B4 3 2 1 0 5 4 3 2 1 0 1 1 1 1 1 1 9 8 7 6 5 4 3 2 1 0
5 4 3 2 1 0
0 0 0 0 0 0 0 0 0 1 0 0 0 1 1 0 0 0 0 0
0 0 0 1 1 1 1 1 1 1 1 0 0 1 0 0 0 0 0 0
0 0 1 0 0 0 0 1 0 0 0 0 0 1 0 0 0 1 0 0
0 0 1 1 0 0 0 1 0 0 0 0 0 1 1 1 1 1 1 0
0 1 0 0 0 0 1 0 0 1 0 0 1 0 0 0 0 1 0 0
0 1 0 1 0 0 1 1 1 1 0 0 1 0 0 0 0 1 0 0
0 1 1 0 0 1 1 0 0 1 0 1 0 1 0 0 1 0 0 0
0 1 1 1 1 0 1 0 0 1 1 0 0 1 0 0 1 0 0 0
0
X 00 X 00
1 0 0 0 0 0 1 0 0 1 0 0 0 1 0 1 0 0 0 0
1 0 0 1 0 0 1 0 0 1 0 0 0 0 0 1 0 0 0 0
1 0 1 0 0 0 1 0 0 1 0 0 0 0 1 0 0 0 0 0
1 0 1 1 0 0 1 1 1 1 0 0 0 0 1 0 0 0 0 0
1 1 0 0 0 0 1 0 0 1 0 0 0 1 0 0 0 0 0 0
1 1 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0
1 1 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0
1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 1 1 0
0 0 0 1 0 0 0 1 1 0 1 0 0 0 0 0 0 1 0 0
0 0 1 0 0 0 1 0 0 0 0 1 0 0 1 1 0 1 0 0
0 0 1 1 0 1 0 1 1 1 0 1 1 0 1 0 0 1 0 0
0 1 0 0 1 0 0 0 0 0 0 0 1 0 1 0 0 1 0 0
0 1 0 1 0 1 1 1 1 1 1 1 0 0 1 0 0 1 0 0
0 1 1 0 0 1 0 0 0 0 0 1 0 0 1 0 0 1 0 0
0 1 1 1 0 1 1 1 1 1 1 1 0 0 1 0 0 1 0 0
1 0 0 0 0 1 0 0 0 0 0 1 0 0 1 0 0 1 0 0
1 0 0 1 0 1 1 1 1 1 1 1 0 0 1 0 0 1 0 0
1 0 1 0 0 1 0 0 0 0 0 0 0 0 1 0 0 1 0 0
1 0 1 1 0 1 1 1 1 1 1 1 1 0 0 0 1 0 0
1 1 0 0 1 0 1 0 0 0 0 0 1 0 1 0 0 1 0 0
1 1 0 1 1 0 1 1 1 1 1 1 1 0 0 1 1 1 0 0
1 1 1 0 1 0 1 0 0 0 0 0 1 0 0 0 1 0 0 0
1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0
X 01 X 01
Table 5: DDRAM data (character code) vs. CGRAM data/address map
Note:
1. DDRAM data (character code) bit1 and bit2 are identical with CGRAM address bit4 and bit5.
2. CGRAM address bit0 to bit3 specify total 16 rows. Row-16 is for cursor display. The data in Row-16 will be logically OR to the cursor.
3. CGRAM data for each address is 16 bits.
4. To select the CGRAM font, the bit4 through bit15 of DDRAM data must be “0” while bit0 and bit3 are “don’t care”.
V4.0
13/49
2008/08/18
SITRONIX [ SITRONIX TECHNOLOGY CO., LTD. ]
