Epson SED1278D, Product Manual

SED1278F/D

4

 Timing Chart

 DISPLAY COMMAND

    Read Cycle

RS

V

IH1

V

IH1

V

IH1

V

IH1

V

IH1

V

IL1

V

OH1

V

OL1

V

OH1

Significant

Data

V

OL1

V

IL1

V

IL1

V

IL1

V

IH1

V

IL1

R/W

E

DB0 to DB7

t

AS

t

cycE

t

RD

t

WEH

t

AH

t

AH

t

fE

t

fE

t

DHR

RS

V

IH1

V

IL1

V

IH1

V

IH1

V

IL1

V

IL1

V

IH1

V

IL1

V

IH1

Significant

Data

V

IL1

V

IL1

V

IL1

V

IL1

V

IH1

V

IL1

E

DB0 to DB7

t

AS

t

cycE

t

WEH

t

DS

t

AH

t

AH

t

fE

t

fE

t

DH

    Write Cycle

R/W

CLEAR DISPLAY
CURSOR HOME
ENTRY MODE SET

DISPLAY ON/OFF

CURSOR/DISPLAY SHIFT

SYSTEM SET

SET CGRAM ADDRESS
SET DDRAM ADDRESS

WRITE DATA
READ DATA

READ BUSY FLUG/

ADDRESS COUNTER

0
0
0

0

0

0

0
0

0

1
1

0
0
0

0

0

0

0
0

1

0
1

0
0
0

0

0

0

0
1

BF

0
0
0

0

0

0

0
0
0

0

0

1

0
0
0

0

1

DL

0
0
0

1

S/C

N

0
0
1

D

R/L

F

0
1

I/D

C

1
1

I/D

C

1

Parameter

Note

RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0

A

CG

A

DD

AC

Write Data
Read Data

DB1=1: Increment, DB1=0: Decrement
DB0=1:  The display is shifted. 
DB0=0: The display is not shifted.
DB2=1: Display on

DB2=0: Display off

DB1=1: Cursor on

DB1=0: Cursor off

DB0=1: Brinking on

DB0=0: Brinking off

DB3=1: Shifts display one character
DB2=1: Right shift, DB2=0: Left shift

DB4=1: 8 bits, DB4=0: 4 bits
DB3=1: 2 lines display (1/16 duty),
DB3=0: 1 line display

DB2=1: 5   10 dots, 1/11 duty
DB2=0: 5   7 dots, 1/8 duty

The address length that can be set is 64 addresses.
The address length that can be set is 80 addresses.

DB7=1: Busy (instruction not accepted)
DB7=0: Ready (instruction accepted)

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