LC75817E Datasheet, PDF (8/43 Pages) Sanyo Semicon Device – 1/8 to 1/10 Duty Dot Matrix LCD Display Controller/Driver with Key Input Function

LC75817E, 75817W
Block Functions
• AC (address counter)
AC is a counter that provides the addresses used for DCRAM and ADRAM.
The address is automatically modified internally, and the LCD display state is retained.
• DCRAM (data control RAM)
DCRAM is RAM that is used to store display data expressed as 8-bit character codes. (These character codes are
converted to 5 × 7, 5 × 8, or 5 × 9 dot matrix character patterns using CGROM or CGRAM.) DCRAM has a capacity of
48 × 8 bits, and can hold 48 characters. The table below lists the correspondence between the 6-bit DCRAM address
loaded into AC and the display position on the LCD panel.
• _{When the DCRAM address loaded into AC is 00H.}
Display digit
DCRAM address (hexadecimal)
1
2
3
4
5
6
7
8
9 10 11 12
00 01 02 03 04 05 06 07 08 09 0A 0B
However, when the display shift is performed by specifying MDATA, the DCRAM address shifts as shown below.
Display digit
DCRAM address (hexadecimal)
1
2
3
4
5
6
7
8
9 10 11 12
01 02 03 04 05 06 07 08 09 0A 0B 0C _{(Left shift)}
Display digit
DCRAM address (hexadecimal)
1
2
3
4
5
6
7
8
9 10 11 12
2F 00 01 02 03 04 05 06 07 08 09 0A _{(Right shift)}
Note: *3. The DCRAM addresses are expressed in hexadecimal.
Least significant bit
↓
LSB
DCRAM address DA0
DA1
DA2
Hexadecimal
DA3
Most significant bit
↓
MSB
DA4
DA5
Hexadecimal
Example: When the DCRAM address is 2E_H.
DA0
DA1
DA2
DA3
DA4
DA5
0
1
1
1
0
1
Note: *4. 5 × 7 dots ... 12-digit display
5 × 8 dots ... 12-digit display
5 × 9 dots ... 12-digit display
5 × 7 dots
5 × 8 dots
4 × 9 dots
No. 6144-8/43