TOPWAY

LCD Module User Manual

LMB202DFC

www.topwaysz.com

Document Name: LMB202DFC-Manual-Rev0.1

Page: 10 of 11

4.5

Display Commands

Code

No.

Instructions

Function

1

Clear

Display

0

0

0

0

0

0

0

0

0

1

Write “20h” to DDRAM and

set DDRAM address (AC) to “00h”

2

Return

Home

0

0

0

0

0

0

0

0

1

x

Set DDRAM address (AC) to “00h” and

return cursor to its original position if shifted

(DDRAM contents are not change)

3

Entry Mode

Set

0

0

0

0

0

0

0

1

I/D

S

Set cursor moving direction and specify display

shift, during data read and write of DDRAM and

CGRAM.

S=1, screen shifting;

S=0, no screen shifting

I/D=1, AC=AC+1 and if S=1, screen shift left

I/D=0, AC=AC-1 and if S=1, screen shift right

4

Display

ON/OFF

0

0

0

0

0

0

1

D

C

B

D=1, display on;

D=0, display off

C=1, cursor on;

C=0, cursor off

B=1, cursor blinking on; B=0, cursor blinking off

5

Cursor or

Display Shift

0

0

0

0

0

1 S/C R/L

x

x

Move the cursor or shift the display, where

DDRAM contents.

S/C=1, shift screen;

S/C=0, shift cursor

R/L=1, to right-side;

R/L=0, to left side

(if S/C=1, AC will not be changed)

6

Function

Set

0

0

0

0

1

DL

N

F

x

x

DL=1, 8-bit interface;

DL=0, 4-bit interface

N=1, 2-line display;

N=0, 1-line display

F=1, 5x11 dots font;

F=0, 5x8 dots font

7

Set CGRAM

address

0

0

0

1 AC5 AC4 AC3 AC2 AC1 AC0

Set CGRAM address in address counter

8

Set DDRAM

address

0

0

1 AC6 AC5 AC4 AC3 AC2 AC1 AC0

Set DDRAM address in address counter

9

Read Busy flag

& address

0

1

BF AC6 AC5 AC4 AC3 AC2 AC1 AC0

Check the system status and get the address

counter content (AC6~AC0).

BF=1, busy;

BF=0, ready

10

Write data

to RAM

1

0

D7 D6 D5 D4 D3 D2 D1 D0

Write the data into internal RAM, where the

address counter pointing at.

11

Read data

from RAM

1

1

D7 D6 D5 D4 D3 D2 D1 D0

Read the data from internal RAM, where the

address counter pointing at.

Note:

*1. Do not use any other command not listed, or the system malfunction may result.

*2. For the details of the Display Commands, please refer to ST7066U datasheet.