Epson SED1278D, Product Manual

SED1278F/D

2

 PIN CONFIGURATION

 PIN DESCRIPTION

ABSOLUTE MAXIMUM RATINGS

INDEX

1

5

10

15

20

25

30

35

40

45

50

55

60

65

80

75

70

SED1278F

SEG38
SEG37
SEG36
SEG35
SEG34
SEG33
SEG32
SEG31
SEG30
SEG29
SEG28
SEG27
SEG26
SEG25
SEG24
SEG23

DB1
DB0
E
R/W
RS
D0
FR
V

DD

XSCL
LP
V5
V4
V3
V2
V1
OSC2

SEG39

SEG40

COM16

COM15

COM14

COM13

COM12

COM11

COM10

COM9

COM8

COM7

COM6

COM5

COM4

COM3

COM2

COM1

DB7

DB6

DB5

DB4

DB3

DB2

SEG22

SEG21

SEG20

SEG19

SEG18

SEG17

SEG16

SEG15

SEG14

SEG13

SEG12

SEG11

SEG10

SEG9

SEG8

SEG7

SEG6

SEG5

SEG4

SEG3

SEG2

SEG1

V

SS

OSC1

QFP5-80pin

Unit: mm

Rating

Supply voltage (1)
Supply voltage (2)
Input voltage
Output voltage
Power dissipation
Operating temperature
Storage temperature
Soldering temperature and time

Symbol

V

DD

V

1

 to V

5

V

I

V

O

P

D

T

opr

T

stg

T

sol

Unit

V
V
V
V

mW

˚C
˚C
—

Value

-0.3 to 7.0

-0.3 to V

DD

+0.3

-0.3 to V

DD

+0.3

-0.3 to V

DD

+0.3

300

-20 to 75

-65 to 150

260˚C   10s (at lead)

(V

SS

=0V, Ta=25˚C)

Symbol

RS

R/W

E

DB0 to DB7

LP

XSCL

FR

DO

COM 1 to COM16

SEG1 to SEG40

V1 to V5

V

DD

V

SS

OSC1
OSC2

No. of signals

1
1
1
8
1
1
1
1

16

40

5
1
1

2

0

0

1
1

1

1

Function

Register select signal
Read/write select signal
Read/write execute signal
Data bus
Data latching pulse
Data transfer clock
LCD AC driving signal
Serial data
Common outputs
COM9 to COM16: non-select for 1/8 duty
COM12 to COM16: non-select for 1/11 duty
Segment outputs
LCD driving power (V

5

>

=

V

SS

)

+5V
0V (GND)
Used to connect resistor (typ. 91K-ohms) for oscillation;
OSC1 is for external clock input.

Instruction write cycle

DD RAM or CG RAM data write cycle
DD RAM or CG RAM data read cycle

Busy flag read cycle
Address counter read cycle

RS

0

1

1

1

0
1

R/W

E

Operation

Note: The following condition must always hold true: V

DD

>

=V

1

>

=V

2

>

=V

3

>

=V

4

>

=V

5