MSM6222 데이터 시트보기 (PDF) - Oki Electric Industry

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MSM6222

DOT MATRIX LCD CONTROLLER WITH 16-DOT COMMON DRIVER AND 40-DOT SEGMENT DRIVER

Oki Electric Industry 

¡ Semiconductor

MSM6222B-xx

(5) Cursor and display shift

R/W RS DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0

Instruction code L L L L L H D/C R/L X X

X : Don't Care

When D/C = "L" and R/L = "L", the cursor and blink positions are shifted to the left by

1 character position (ADC is decremented by 1).

When D/C = L and R/L = "H", the cursor and blink positions are shifted to the right by

1 character position (ADC is incremented by 1).

When D/C = "H" and R/L = "L", the entire display is shifted to the left by 1 character

position. The cursor and blink positions are also shifted with the display (ADC remains

unchanged).

When D/C = "H" and R/L = "H", the entire display is shifted to the right by 1 character

position. The cursor and blink positions are also shifted with the display (ADC remains

unchanged).

In the 2-line display mode, the cursor and blink positions are shifted from the first to

the second line when the cursor is shifted to the right next to the fortieth digit (27; hex.)

in the first line. No such shifting is made in other cases.

When shifting the entire display, the display pattern, cursor, and blink positions are in

no case shifted between lines (from the first to the second line or vice versa).

The execution time, when the OSC oscillation frequency is 250 kHz, is 40 ms.

(6) Initial setting

Instruction code

R/W RS DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0

L L L L H 8B/4B N F X X

X : Don't Care

1 When 8B/4B = "H", the data input/output to and from the CPU is carried out

simultaneously by means of 8 bits DB7 to DB0.

When 8B/4B = "L", the data input/output to and from the CPU is carried out in two

steps through 4 bits of DB7 to DB4.

2 The 2-line display mode of the LCD is selected when N = "H", while the 1-line

display mode is selected when N = "L".

3 The 5 x 7 dots character font is selected when F = "L", while the 5 x 10 dots character

font is selected when F = "H" and N = "L".

This initial setting has to be accessed prior to other instructions except for the busy

flag read after the power is supplied to the MSM6222B-xx.

N

Number of Character

F display lines

font

Duty Number

Number of

ratio of biases COMMOM signals

L

L

1 - line

5 x 7 dots

1/8

4

8

L

H

1 - line

5 x 10 dots

1/11

4

11

H

L

2 - line

5 x 7 dots

1/16

5

16

HH

2 - line

5 x 7 dots

1/16

5

16

30/45

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