64COM/128SEG GRAPHIC DRIVER FOR DOT MATRIX LCD

S6B0708

19

DETAILED INSTRUCTION DESCRIPTIONS

Read Display Data

Reads 8-bit data in the display data RAM area specified by column address and page address. As the column

address is incremented by 1 automatically after each read operation, the microprocessor can continue to read

data of multiple words.

RS

RW

DB7

DB6

DB5

DB4

DB3

DB2

DB1

DB0

1

1

Read Data

W rite Display Data

Writes 8-bit data to the display data RAM

As the column address is incremented by 1 automatically after each write operation, the microprocessor can

continue to write data of multiple words.

RS

RW

DB7

DB6

DB5

DB4

DB3

DB2

DB1

DB0

1

0

Write Data

Read Status

Indicates the internal status conditions of the device to the microprocessor.

RS

RW

DB7

DB6

DB5

DB4

DB3

DB2

DB1

DB0

0

1

Busy

0

On/Off

RESET

0

0

0

0

Flag

Description

Busy

The device is busy due to internal operation or reset. Any instruction is rejected until

BUSY goes low.

On/Off

Indicates whether the display is on or off. When low, the display is on. When high,

the display is off. This is the opposite of Display ON/OFF instruction.

RESET

Indicates the initialization is in progress by RESETB signal. When low, the chip is in

active. When high, the chip is being reset.