User Manual

HD44780U

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

00001110* *

Sets to 8-bit operation and

selects 2-line display and 5 × 8

dot character font.

3 Display on/off control

0000001110

Turns on display and cursor.

All display is in space mode

because of initialization.

4 Entry mode set

0000000110

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

1001001000

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.

6·

7 Write data to CGRAM/DDRAM

1001001001

HITACHI_

Writes I.

8 Set DDRAM address

0011000000

HITACHI

Sets DDRAM address so that

the cursor is positioned at the

head of the second line.