MSM6562B Ver la hoja de datos (PDF) - Oki Electric Industry

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componentes Descripción

Fabricante

MSM6562B

DOT MATRIX LCD CONTROLLER DRIVER

Oki Electric Industry 

¡ Semiconductor

MSM6562B-xx

13. Description of Instructions

The instruction code is defined as the signal through which the MSM6562B-xx is accessed by

the CPU.

The MSM6562B-xx begins operation upon receipt of the instruction code input.

As the internal processing operation of MSM6562B-xx is started with a timing that does not affect

the LCD display, the busy status continues longer than the CPU cycle time.

Under the busy status (when the busy flag is set to "H"), the MSM6562B-xx does not execute any

instructions other than the busy flag read.

Therefore, it must be confirmed before an instruction code is input from the CPU that the busy

flag is set to "L".

(1) Display clear

When this instruction is executed, the LCD display is cleared.

The I/D value for the entry mode set instruction is set to 1 (increment). The S value for the

entry mode set instruction does not change.

When the cursor and blink are being displayed, the blinking and cursor position moves

to the left end of the LCD (the left end of the first line in the 2-line display mode).

Instruction code

RS1 RS0 R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0

1

0

0

0

0

0

0

0

0

0

1

(Note) All DD RAM data goes to "20" (hex.), while the address counter (ADC) goes to

"00" (hex.) of the DD RAM address. The execution time when the OSC

oscillation frequency is 250kHz is 1.64ms (max.).

(2) Cursor home

When this instruction is executed, the cursor and blinking position move to the left end

of the LCD (to the left end of the first line in the 2-line display mode) when the cursor and

blink are being displayed.

When the display is in shift, the display returns to its original position before shifting.

Instruction code

RS1 RS0 R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0

1

0

0

0

0

0

0

0

0

1

X

X : Don't Care

(Note) The address counter (ADC) goes to "00" (hex.) of the DD RAM address. The

execution time when the OSC oscillation frequency is 250kHz is 1.64ms (max.).

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