LC75810E 데이터 시트보기 (PDF) - ON Semiconductor

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LC75810E

1/8 to 1/10 Duty Dot Matrix LCD Display Controllers/Drivers

ON Semiconductor 

Block Functions

LC75810E/T

• 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

DCRAM address

(hexadecimal)

First line

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11

61 62 63 64

3C 3D 3E 3F

However, when the display smooth scrolling is performed, the DCRAM address shifts as follows.

Display digit

DCRAM address

(hexadecimal)

First line

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12

61 62 63 64 Shift to the left

3D 3E 3F 00 by 1 character

digit

Display digit

DCRAM address

(hexadecimal)

First line

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

3F 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10

61 62 63 64 Shift to the right

3B 3C 3D 3E 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

DCRAM address

(hexadecimal)

First line 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11

Second line 20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30 31

29 30 31 32

1C 1D 1E 1F

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

DCRAM address

(hexadecimal)

First line 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12

Second line 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30 31 32

29 30 31 32 Shift to the left

1D 1E 1F 00 by 1 character

3D 3E 3F 20 digit

Display digit

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

DCRAM address

(hexadecimal)

First line 1F 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10

Second line 3F 20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30

29 30 31 32 Shift to the right

1B 1C 1D 1E by 1 character

3B 3C 3D 3E digit

Display digit

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

DCRAM address

(hexadecimal)

First line 20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 30 31

Second line 00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11

29 30 31 32 Shift to the up or

3C 3D 3E 3F down by 1

1C 1D 1E 1F 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.

No.7141-8/54

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