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HD44780 Datasheet(PDF) 43 Page - Hitachi Semiconductor

Part No. HD44780
Description  Dot Matrix Liquid Crystal Display Controller/Driver
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Maker  HITACHI [Hitachi Semiconductor]
Homepage  http://www.renesas.com/eng
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 43 page
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HD44780U
43
Table 13
8-Bit Operation, 8-Digit
× 2-Line Display Example with Internal Reset
Step
Instruction
No.
RS
R/
W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 Display
Operation
1
Power supply on (the HD44780U is initialized by the internal
reset circuit)
Initialized. No display.
2
Function set
00
001
110
*
*
Sets to 8-bit operation and
selects 2-line display and 5
× 8
dot character font.
3
Display on/off control
00
000
011
10
_
Turns on display and cursor.
All display is in space mode
because of initialization.
4
Entry mode set
00
000
001
10
_
Sets mode to increment the
address by one and to shift the
cursor to the right at the time of
write to the DD/CGRAM.
Display is not shifted.
5
Write data to CGRAM/DDRAM
10
010
010
00
H_
Writes H. DDRAM has already
been selected by initialization
when the power was turned on.
The cursor is incremented by
one and shifted to the right.
·
·
·
·
·
·
·
·
·
7
Write data to CGRAM/DDRAM
10
010
010
01
HITACHI_
Writes I.
8
Set DDRAM address
00
110
000
00
HITACHI
_
Sets DDRAM address so that
the cursor is positioned at the
head of the second line.




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