FD2000
Rev1.0
6.3. ADRAM (ADDITIONAL DATA RAM)
ADRAM is RAM used to store the ADATA display data. ADRAM has a capacity of 12 x 5 bits, and the stored
display data is displayed directly without the use of CGROM or CGRAM. The table below lists the correspondence
between the 4-bit ADRAM address loaded into AC and the display position on the LCD panel.
− When the ADRAM address loaded into AC is 0H. (Number of digit displayed: 12)
Display digit
1
0
2
1
3
2
4
3
5
4
6
5
7
6
8
7
9
8
10
9
11
A
12
B
ADRAM address(HEX)
However, when the display shift is performed by specifying ADATA, the ADRAM address shifts as shown below.
Display digit
1
1
2
2
3
3
4
4
5
5
6
6
7
7
8
8
9
9
10
A
11
B
12
0
ADRAM address(HEX)
(Left shift)
Display digit
1
2
0
3
1
4
2
5
3
6
4
7
5
8
6
9
7
10
8
11
9
12
A
ADRAM address(HEX)
B
(Right shift)
NOTE: The ADRAM addresses are expressed in hexadecimal.
LSB
RA0
←
MSB
RA3
→
ADRAM address
RA1
RA2
HEX
− Example: When the ADRAM address is AH.
LSB
RA0
0
MSB
RA3
1
RA1
1
RA2
0
NOTE: 5 x 7 dots ... 12-digit display 5 dots
5 x 8 dots ... 12-digit display 4 dots
5 x 9 dots ... 12-digit display 3 dots
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