FD2000

Rev1.0

10/37

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

2

3

4

5

6

7

8

9

10

11

12

ADRAM address(HEX)

0

1

2

3

4

5

6

7

8

9

A

B

However, when the display shift is performed by specifying ADATA, the ADRAM address shifts as shown below.

Display digit

1

2

3

4

5

6

7

8

9

10

11

12

ADRAM address(HEX)

1

2

3

4

5

6

7

8

9

A

B

0

(Left shift)

Display digit

1

2

3

4

5

6

7

8

9

10

11

12

ADRAM address(HEX)

B

0

1

2

3

4

5

6

7

8

9

A

(Right shift)

NOTE: The ADRAM addresses are expressed in hexadecimal.

LSB

MSB

ADRAM address

RA0

RA1

RA2

RA3

←

HEX

→

−

Example: When the ADRAM address is AH.

LSB

MSB

RA0

RA1

RA2

RA3

0

1

0

1

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