ST7565P datasheet(45/71 Pages) SITRONIX

45 / 71 page

ST7565P

Ver 2.1b

45/71

2009/09/14

LCD Bias Set

This command selects the voltage bias ratio required for the liquid crystal display.

Select Status

R/W

/RD

/WR

D0 1/65duty

1/49duty

1/33duty

1/55duty

1/53duty

1/9 bias

1/8 bias

1/6 bias

1/8 bias

1/7 bias

1/6 bias

1/5 bias

1/6 bias

Read/Modify/Write

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

does not change the column address, but only the display data write command increments (+1) the column address. This mode

is maintained until the END command is input. When the END command is input, the column address returns to the address it

was at when the read/modify/write command was entered. 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 when there is a blanking cursor.

R/W

/RD

/WR

D7 D6 D5 D4 D3 D2 D1 D0

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)

Figure 24 Command Sequence For read modify write

Figure 25

Column address

Read-modify-write mode set

N+1

N+2

N+3

N+m

End

Return

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