ML9042 datasheet(33/58 Pages) OKI

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FEDL9042-01

OKI Semiconductor

ML9042-xx

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3) Entry Mode Setting

RS1

RS0

DB7

DB6

DB5

DB4

DB3

DB2

DB1

I/D

DB0

Instruction code:

(1)

When the I/D is set, the cursor or blink shifts to the right by 1 character position (ID= “1”; increment) or to

the left by 1 character position (I/D= “0”; decrement) after an 8-bit character code is written to or read

from the DDRAM. At the same time, the address counter (ADC) is also incremented by 1 (when I/D =

“1”; increment) or decremented by 1 (when I/D = “0”; decrement). After a character pattern is written to

or read from the CGRAM, the address counter (ADC) is incremented by 1 (when I/D = “1”; increment) or

decremented by 1 (when I/D = “0”; decrement).

Also after data is written to or read from the ABRAM, the address counter (ADC) is incremented by 1

(when I/D = “1”; increment) or decremented by 1 (when I/D = “0”; decrement).

(2)

When S = “1”, the cursor or blink stops and the entire display shifts to the left (I/D = “1”) or to the right

(I/D = “0”) by 1 character position after a character code is written to the DDRAM.

In the case of S = “1”, when a character code is read from the DDRAM, when a character pattern is

written to or read from the CGRAM or when data is written to or read from the ABRAM, normal

read/write is carried out without shifting of the entire display. (The entire display does not shift, but the

cursor or blink shifts to the right (I/D = “1”) or to the left (I/D = “0”) by 1 character position.)

When S = “0”, the display does not shift, but normal write/read is performed.

Note:

The execution time of this instruction is 37

µs (maximum) at an oscillation frequency of

270 kHz.

4) Display ON/OFF Control

RS1

RS0

DB7

DB6

DB5

DB4

DB3

DB2

DB1

DB0

Instruction code:

(1)

The “D” bit (DB2) of this instruction determines whether or not to display character patterns on the LCD.

When the “D” bit is “1”, character patterns are displayed on the LCD.

When the “D” bit is “0”, character patterns are not displayed on the LCD and the cursor/blinking also

disappear.

Note:

Unlike the Display Clear instruction, this instruction does not change the character code in the

DDRAM .

(2)

When the “C” bit (DB1) is “0”, the cursor turns off. When both the “C” and “D” bits are “1”, the cursor

turns on.

(3)

When the “B” bit (DB0) is “0”, blinking is canceled. When both the “B” and “D” bits are “1”, blinking is

performed.

In the Blinking mode, all dots including those of the cursor, the character pattern and the cursor are

alternately displayed.

Note:

The execution time of this instruction is 37

µs (maximum) at an oscillation frequency of

270 kHz.

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