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LC7581E Datasheet(PDF) 8 Page - ON Semiconductor

No. de pieza LC7581E
Descripción Electrónicos  1/8 to 1/10 Duty Dot Matrix LCD Display Controllers/Drivers
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Fabricante Electrónico  ONSEMI [ON Semiconductor]
Página de inicio  http://www.onsemi.com
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LC7581E Datasheet(HTML) 8 Page - ON Semiconductor

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LC75810E/T
No.7141-8/54
Block Functions
AC (Address counter)
AC is a counter that provides the DCRAM address.
The address is automatically modified internally, and the LCD display state is retained.
DCRAM (Data control RAM)
DCRAM is the 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 64
× 8 bits, and can hold 64 characters. The table below lists the correspondence between the
6-bit DCRAM address loaded into AC and the display position on the LCD panel.
For a 64 digits
× 1 line display structure (For a “set display technique” instruction with 0Z1 = 0 and 0Z2 = 0)
When the DCRAM address loaded into AC is 00H
Display digit
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18
61 62 63 64
DCRAM address
(hexadecimal)
First line
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11
3C 3D 3E 3F
However, when the display smooth scrolling is performed, the DCRAM address shifts as follows.
Display digit
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18
61 62 63 64
DCRAM address
(hexadecimal)
First line
01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12
3D 3E 3F 00
Shift to the left
by 1 character
digit
Display digit
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18
61 62 63 64
DCRAM address
(hexadecimal)
First line
3F 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10
3B 3C 3D 3E
Shift to the right
by 1 character
digit
Note that the display area on the LCD is display digits 1 to 16 on the first line when a display technique is 5
× 7, 5 × 8,
or 5
× 9 dots, and it is display digits 1 to 13 on the first line when a display technique is 6 × 7, 6 × 8, or 6 × 9 dots.
For a 32 digits
× 2 lines display structure (For a “set display technique” instruction with 0Z1 = 1 and 0Z2 = 0)
When the DCRAM address loaded into AC is 00H
Display digit
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18
29 30 31 32
First line
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11
1C 1D 1E 1F
DCRAM address
(hexadecimal)
Second line 20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30 31
3C 3D 3E 3F
However, when the display smooth scrolling is performed, the DCRAM address shifts as follows.
Display digit
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18
29 30 31 32
First line
01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12
1D 1E 1F 00
DCRAM address
(hexadecimal)
Second line 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30 31 32
3D 3E 3F 20
Shift to the left
by 1 character
digit
Display digit
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18
29 30 31 32
First line
1F 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10
1B 1C 1D 1E
DCRAM address
(hexadecimal)
Second line 3F 20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30
3B 3C 3D 3E
Shift to the right
by 1 character
digit
Display digit
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18
29 30 31 32
First line
20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30 31
3C 3D 3E 3F
DCRAM address
(hexadecimal)
Second line 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11
1C 1D 1E 1F
Shift to the up or
down by 1
character digit
Note that the display area on the LCD is display digits 1 to 16 on the first line when a display technique is 5
× 7, 5 × 8,
or 5
× 9 dots, and it is display digits 1 to 13 on the first line when a display technique is 6 × 7, 6 × 8, or 6 × 9 dots.


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