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Command Table
Instruction
RS
Instruction code
Description
Execution
time (fosc=
270 KHZ
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 DDRA and
set
DDRAM address to “00H”
from AC
1.53ms
Return
Home
0 0 0 0 0 0 0 0 1 -
Set DDRAM address to
“00H”
From AC and return cursor
to
Its original position if
shifted.
The contents of DDRAM
are not changed.
1.53ms
Entry mode
Set
0 0 0 0 0 0 0 1 I/D SH
direction
And blinking of entire
Assign cursor moving
display
39us
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.
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.
39us
Function
set
0 0 0 0 1 DL N F - -
Set interface data length
(DL: 8-
Bit/4-bit), numbers of
display
Line (N: =2-line/1-line) and,
Display font type (F:
5x11/5x8)
39us
Set
CGRAM
Address
0 0 0 1 AC5
AC4 AC3
AC2
AC1
AC0
Set CGRAM address in
address counter.
39us
Set
DDRAM
Address
0 0 1 AC6
AC5
AC4
AC3
AC2
AC1
AC0
Set DDRAM address in
address counter.
39us
Read busy
Flag and
Address
0 1 BF AC6
AC5
AC4
AC3
AC2 AC1
AC0
Whether during internal
Operation or not can be
known
By reading BF. The
contents of
Address counter can also
be read.
0us
Write data
To Address
1 0 D7 D6 D5 D4 D3 D2 D1 D0
Write data into internal
RAM
(DDRAM/CGRAM).
43us
Read data
From RAM
1 1 D7 D6 D5 D4 D3 D2 D1 D0
Read data from internal
RAM
(DDRAM/CGRAM).
43us
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