ST7577 datasheet(24/48 Pages) SITRONIX

24 / 48 page

ST7577

Ver 1.0a

24/48

2008/02/14

10. INSTRUCTION DESCRIPTION

Function Set

R/W(/WR)

Flag

Description

Set COM scan direction:

MY=0: Normal direction (COM0->COM38, duty is determined by the

“Display Duty” setting);

MY=1: Reverse direction (COM38->COM0, duty is determined by the

“Display Duty” setting).

Set DDRAM write direction.

XD=1: Write from X=0 to X=131 (Normal direction);

XD=0: Write from X=131 to X=0 (Reverse direction).

Set the power mode:

PD=0: Chip is active;

PD=1: Chip is in power save mode.

In power save mode, all LCD outputs at VSS, built-in power circuits (Booster, Regulator and Follower) are

turned OFF, Oscillator OFF (external clock is possible), RAM contents is not cleared; RAM data can be

written.

Select Vertical or Horizontal addressing mode.

V=0: Horizontal addressing mode;

V=1: Vertical addressing mode.

H is used to select the extended instruction set.

Please refer to the instruction table.

Read Status

R/W(/WR)

MLB

Flag

Description

PD=0: Chip is active;

PD=1: Chip is in power down mode.

D, E

Display Mode

Display Blank (DDRAM Data is masked out)

All Segments ON

Normal mode

Inverse Display mode

XD, MY

Display Mode

Only horizontal direction is mirrored.

Both horizontal and vertical direction is mirrored.

Normal direction.

Only vertical direction is mirrored.

Select Vertical or Horizontal addressing mode.

V=0: Horizontal addressing mode;

V=1: Vertical addressing mode.

MLB

Data Format. MLB=0: LSB on top; MLB=1: MSB on top.

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