NT7502 데이터 시트보기 (PDF) - Novatek Microelectronics

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NT7502

65 X 132 RAM-Map LCD Controller / Driver

Novatek Microelectronics 

NT7502

10. Entire Display ON

Forcibly turns the entire display on regardless of the contents of the display data RAM. At this time, the contents of the

display data RAM are held.

This command has priority over the Normal/Reverse Display command. When D is low, the normal display status is

provided.

A0 E R / W D7 D6 D5 D4 D3 D2 D1 D0

RD WR

01 0 1010010D

When D is high, the entire display ON status is provided. If the Entire Display ON command is executed in the display OFF

status, the LCD panel enters Power Save mode. Refer to the Power Save section for details.

11. Set LCD Bias

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

A0 E R / W D7 D6 D5 D4 D3 D2 D1 D0

RD WR

01 0 1 0 1 0 0 0 1 0

1

1/33

1/6 bias

1/5 bias

Duty

1/49

1/55

1/8 bias

1/8 bias

1/6 bias

1/6 bias

1/65

1/9 bias

1/7 bias

12. Read-Modify-Write

A pair of Read-Modify-Write and End commands must always be used. Once Read-Modify-Write is issued, column address

is not incremental by Read Display Data command but incremental by Write Display Data command only. It continues until

End command is issued. When the End is issued, column address returns to the address when Read-Modify-Write is

issued. This can reduce the microprocessor load when data of a specific display area is repeatedly changed during cursor

blinking or other events.

A0 E R / W D7 D6 D5 D4 D3 D2 D1 D0

RD WR

01 0 11100000

Note: Any command except Read/Write Display Data and Set Column Address can be issued during Read-Modify-Write

mode.

Cursor display sequence

Set Page Address

Set Column Address

Read-Modify-Write

Dummy Read

Read Data

No

Data process

Write Data

Completed?

Yes

End

26

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