TOPWAY LCD Module User Manual LMB204BBC
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www.topwaysz.com
Document Name: LMB204BBC-Manual-Rev0.1.DOC
Page: 10 of 11
Display Commands
Code
No. Instructions
RS
R/W
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
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=0, 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 S6A0069 datasheet.
