hd66712u Renesas Electronics Corporation., hd66712u Datasheet - Page 64

• Manufacturer Part Number: hd66712u
• Description: Dot-matrix Liquid Crystal Display Controller/driver - Hitachi Semiconductor
• Manufacturer: Renesas Electronics Corporation.

Table 18
Step
No.
1
2
3
4
5
6
7
8
RS
Power supply on (the HD66712 is initialized by the internal reset
circuit)
Function set
0
Display on/off control
0
Entry mode set
0
Write data to CGRAM/DDRAM
1
Write data to CGRAM/DDRAM
1
Set DDRAM address
0
R/
0
0
0
0
0
0
: :
8-Bit Operation, 24-Digit
DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 Display
0
0
0
0
0
1
0
0
0
1
1
1
1
0
0
0
0
0
Instruction
·
·
·
·
·
1
0
0
0
0
0
1
1
0
1
1
0
2-Line Display Example with Internal Reset
0
1
1
0
0
0
*
1
1
0
0
0
*
0
0
0
1
0
HITACHI_
HITACHI
H_
_
_
_
·
·
·
·
·
Operation
Initialized. No display.
Sets to 8-bit operation and
selects 2-line display.
Clear bit 2.
Turns on display and cursor. All
display is in space mode
because of initialization.
Sets mode to increment the
address by one and to shift the
cursor to the right at the time of
write to the RAM. Display is not
shifted.
Writes “H.” DDRAM has already
been selected by initialization at
power-on.
Writes I.
Sets DDRAM address so that
the cursor is positioned at the
head of the second line.
HD66712U
427