ST7567 datasheet(25/49 Pages) SITRONIX

25 / 49 page

ST7567

Ver 1.4b

25/49

2009/02/04

Read-modify-Write

This command is used paired with the “END” instruction. Once this command has been input, the display data read

operation will not change the column address, but only the display data write operation will increase the column address

(X[7:0]+1). This mode is maintained until the END command is input. This function makes it possible to reduce the load on

the MPU when there are repeating data changes in a specified display region, such as a blanking cursor.

R/W(RWR)

In Read-modify-Write mode, other instructions aside from display data read/write commands can also be used.

Yes

Read-Modify-Write

Done

Page Address Set

Column Address Set

Finished?

Dummy Read

Read-Modify-Write Cycle

Data Read

Modify Data

Data Write (at same Address)

END

When the END command is input, the Read-modify-Write mode is released and the column address returns to the address

it was when the Read-modify-Write instruction was entered.

R/W(RWR)

RESET

This instruction resets Start Line (S[5:0]), Column Address (X[7:0]), Page Address (Y[3:0]) and COM Direction (MY) to their

default setting. Please note this instruction is not complete same as hardware reset (RSTB=L) and cannot initialize the

built-in power circuit which is initialized by the RSTB pin. The detailed information is in “Section RESET CIRCUIT”.

R/W(RWR)

ST7567 Datasheet(PDF) 25 Page - Sitronix Technology Co., Ltd.