HD66710 Datasheet, PDF (53/73 Pages) Hitachi Semiconductor – (Dot Matrix Liquid Crystal Display Controller/Driver)

HD66710
Table 15 4-Bit Operation, 16-Digit × 1-Line Display Example with Internal Reset
Step
Instruction
: No. RS R/ D7 D6 D5 D4 D3 D2 D1 D0 Display
Operation
1 Power supply on (the HD66710 is initialized by the internal reset
circuit)
Initialized. No display.
2 Function set
0 0 0 0 1 0 ————
——————————
Sets to 4-bit operation.
Clear bit 2. In this case,
operation is handled as 8 bits by
initialization. *
3 Function set
0 0 0 0 1 0 ————
0 0 0 1 0 0 ————
Sets 4-bit operation and
selects1-line display. Clear BE,
LP bits. 4-bit operation starts
from this step.
4 Function set
0 0 0 0 1 0 ————
0 0 0 0 * * ————
Sets 4-bit operation and
selects1-line display. Clear RE
bit.
5 Return home
0 0 0 0 0 0 ————
0 0 0 0 1 0 ————
Returns both display and cursor
to the original position (address
0).
6 Display on/off control
_
0 0 0 0 0 0 ————
0 0 1 1 1 0 ————
Turns on display and cursor.
Entire display is in space mode
because of initialization.
7 Entry mode set
_
0 0 0 0 0 0 ————
0 0 0 1 1 0 ————
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.
8 Write data to CGRAM/DDRAM
H_
1 0 0 1 0 0 ————
1 0 1 0 0 0 ————
Writes H.
DDRAM has already been
selected by initialization.
Note: 1. The control is the same as for 8-bit operation beyond step #8.
2. When DB3 to DB0 pins are open in 4-bit mode, the RE, BE, LP bits are set to “1” at step #2.
So, these bits are clear to “0” at step #3.
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