5
Instruction
Table
Table 7: Parallel Instruction Table
Instruction
Instruction Code
Description
RS
R/W
DB7
DB6
DB5
DB4
DB3
DB2
DB1
DB0
Clear
Display
0
0
0
0
0
0
0
0
0
1
Write “20H” to all DDRAM locations, set
DDRAM address
to “00H”, return cursor
to its original position, and
set I/D to “1”.
Return
Home
0
0
0
0
0
0
0
0
1
－
Set DDRAM address
to “00H” and
return
cursor to its original position if shifted.
The contents of DDRAM are not changed.
Entry Mode
Set
0
0
0
0
0
0
0
1
I/D
SH
Assign cursor moving direction and
enable the shift of entire display. DDRAM
and CRAM addresses
are
incremented
and cursor moves right when I/D is set to
“1”, the opposite is true when reset to
“0”. Setting SH to “1” causes the entire
display to shift
affecting only DDRAM.
Display
ON/OFF
Control
0
0
0
0
0
0
1
D
C
B
Set display (D), cursor (C), and blinking of
cursor (B) on/off control bit.
Setting D, C,
or B to “1” will cause the display,
underline cursor, or blinking cursor to
turn on, the opposite is true for reset.
Cursor or
Display Shift
0
0
0
0
0
1
S/C
R/L
－
－
Set cursor moving and display shift
control bit, and the direction, without
changing of DDRAM data.
Setting S/L to
“1” will shift the screen horizontally while
the opposite will move the cursor
through all screen positions. Setting R/L
to “1” will shift right immediately. AC
and DDRAM are not altered.
Function Set
0
0
0
0
1
DL
N
F
－
－
Set interface data length, numbers of
display line and, display font type.
Setting DL to “1” specifies 8-bit mode, “0”
4-bit. Setting N to “1” permits a multi-
line display, “0” a single. Resetting F
to
“0” indicates a 5x8 dot character.
Set CGRAM
Address
0
0
0
1
AC5
AC4
AC3
AC2
AC1
AC0
Set CGRAM address in address counter.
Set DDRAM
Address
0
0
1
AC6
AC5
AC4
AC3
AC2
AC1
AC0
Set DDRAM address in address counter.
Read Busy
Flag and
Address
0
1
BF
AC6
AC5
AC4
AC3
AC2
AC1
AC0
Read the status of the display controller
through the BF
Bit. The contents of
address counter can also be read.
Write Data
to RAM
1
0
D7
D6
D5
D4
D3
D2
D1
D0
Write data into internal RAM
(DDRAM/CGRAM), location is determined
by the AC. AC and display shift are
adjusted as specified.
Read Data
from RAM
1
1
D7
D6
D5
D4
D3
D2
D1
D0
Read data from internal RAM
(DDRAM/CGRAM), location is determined
by the AC, set command is recommended
previous to this. Only AC is adjusted.
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