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Table 3

Instructions (note 1)

Notes

control byte: Co, RS, R/W, 0, 0, 0, 0, 0; command byte: DB7 to DB0.

; 3 cycles = 20

µs; 165 cycles = 1.1 ms.

INSTRUCTION

RS

R/W

DB7

DB6

DB5

DB4

DB3

DB2

DB1

DB0

DESCRIPTION

REQUIRED

CLOCK

NOP

0000000000

no operation

0

Clear display

0000000001

clears entire display and sets DDRAM

address 00 in Address Counter (AC)

165

Return home

0000000010

sets DDRAM address 00 in the AC;

also returns shifted display to original

position; DDRAM contents remain

unchanged

3

Entry mode set

00000001

I/D

S

sets cursor move direction and specifies

shift of display; these operations are

performed during data write and read

3

Display control

0000001

D

C

B

sets entire display on/off (D), cursor

on/off (C) and blink of cursor position

character (B)

3

Cursor/display shift

000001

S/C

R/L

00

moves cursor and shifts display without

changing DDRAM contents

3

Function set

00001

DL

N

M

G

0

sets interface data length (DL), number

of display lines (N, M) and voltage

generator control (G); bit G is not used

3

Set CGRAM

address

0001

sets CGRAM address

3

Set DDRAM

address

001

sets DDRAM address

3

Read busy flag and

address

0

1

BF

reads BF indicating internal operation is

being performed and reads AC contents

0

Read data

1

1

read data

reads data from CGRAM or DDRAM

3

Write data

1

0

write data

writes data to CGRAM or DDRAM

3

T

cy

1

f

osc

--------

6.67

µs

==