Page 1
1
SED1278F/D
Dot Matrix LCD Controller Driver
SEIKO EPSON CORPORATION
PF282-07
1/8, 1/11 or 1/16 Duty Dot Matrix Drive
Built-in Character Generator ROM and RAM ( )
Maximum Simultaneous Display of 80 Characters
(With extension LCD driver)
DESCRIPTION
The SED1278F/D is a dot matrix LCD controller/driver which is dedicated to character display. It is capable of
displaying up to 80 characters under 4-bit/8-bit MPU control.
The built-in character generator ROM has an extended capacity of 240 different characters, each being generated
in a 5 10 dots font compatible with a 1/11 duty. In addition, the SED1278F/D contains 64 bytes of character
generator RAM in which the user can store 8 different characters, each consisting of 5 8 dots. These memory
features offer high flexibility in character display.
The guaranteed minimum LCD driving voltage is 3V, and this makes the SED1278F/D suitable for driving low
voltage LCDs.
FEATURES
Display RAM............................... 80 bytes (80 characters)
Character generator ROM.......... 240 characters (Able to 256 characters)
Character generator RAM .......... 8 characters
Built-in CR oscillator, Built-in power-on reset circuit
Maximim display dimension ....... 40 characters 2 lines, 80 characters 1 line
(When accompanied with SED1181FLA/DLA, SED1681FOA/DOA)
1/8, 1/11 or 1/16 duty matirx drive (fixed by command)
2 flame AC wave-form drive
High-speed bus interface with 4-bit/8-bit MPU
Powerful display control instructions
Character.................................... 5 7 dots+Cursor line (5 8 dots also possible)
5 10 dots+Cursor line
6 Kinds of character font
Single power supply ................... 5V±10% (Logic)
Low LCD driving voltage ............ VDD-V
5
>
=
3.0V
Package ..................................... SED1278F: QFP5-80pin (plastic)
SED1278D: Die form (Al pad)
BLOCK DIAGRAM
ROM 240 characters
RAM 8 characters
Instruction Decoder
MPX
MPX
MPX
Display Data RAM
DD RAM
80 Bytes
Character
Generator
RAM
(CG RAM)
64 Bytes
Character
Generator
RAM
(CG RAM)
5 10 240 Byts
Instruction Register
Refresh Address Counter
Address
Counter ACC
Parallel/Serial
Data Converter
Shift Register
40 Bits
Latch Circuit
40 Bits
Segment Driving
Output Circuit
Common Driving
Output Circuit
Shift Register 16 Bits
Timing Generator
Oscillation
Circuit
DB0
DB7
8
8
8
55
8
5
7
7
Cursor/
Brink Control
Data Register
I/O BufferI/O Control
~
E
R
/
W
RS
V
DD
V
SS
V1
V2
V3
V4
V5
OSC1 OSC2
XSCL
LP
FR
COM1
COM16
~~
SEG1
SEG40
D0
SED1278F/D
Page 2
SED1278F/D
2
PIN CONFIGURATION
PIN DESCRIPTION
ABSOLUTE MAXIMUM RATINGS
INDEX
1
510152025
30
35
404550556065
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
V1 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)
(VSS=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
>
=
VSS)
+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
11
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
Page 3
3
SED1278F/D
ELECTRICAL CHARACTERISTICS
DC Characteristics
Write Cycle
V
IH1
V
IL1
V
IH2
V
IL2
V
OH1
V
OL1
V
OH2
V
OL2
R
COM
R
SEG
I
IL
-I
P
I
OP
f
EXTCL
Duty
tr
EXTCL
tf
EXTCL
f
OSC
f
OSC
V
LCD
Symbol
I
OH
=-0.205mA
I
OL
=1.6mA
I
OH
=-0.04mA
I
OL
=0.04mA
|V
COM-Vn
|=0.5V
|V
SEG-Vn
|=0.5V
V
I
=0 to V
DD
VDD=5V
R
f
=91K ±2%
Ceramic filter
V
DD-V5
Condition
2.0
V
SS
VDD-1.0
V
SS
2.4
—
0.9V
DD
—
—
—
—
50
—
125
45
-
-
190
245
3.0
Min.
DB0~DB7
RS, R/W, E
OSC1
DB0~DB7
V
DD
COM1~16
SEG1~40
Applicable
Pin
—
—
—
—
—
—
—
—
2
2.5
—
125
250
50
—
—
270
250
—
0.5
Typ.
V
DD
0.8
V
DD
1.0
—
0.4
—
0.1V
DD
10
10
1
250
350
55
0.2
0.2
350
255
V
DD
0.8
Max.
V
V
V
V
V
V
V
V
k
k
A
A
mA
kHz
%
S
S
kHz
kHz
V
Unit
"H" level input voltage (1)
"L" level input voltage (1)
"H" level input voltage (2)
"L" level input voltage (2)
"H" level output voltage (1)
"L" level output voltage (1)
"H" level output voltage (2)
"L" level output voltage (2)
Driver-on resistor (COM)
Driver-on resistor (SEG)
I/O leakage current
Pull-up MOS current
Supply current
External clock operation
External clock operating frequency
External clock duty
External clock rise time
External clock fall time
Internal clock operation (Rf oscillation)
Oscillation frequency
Internal clock operation (Ceramic filter oscillation)
Oscillation frequency
LCD driving voltage
Characteristic
Rf oscillation, from
external clock
V
DD
=5V, fosc=fCP=270kHz
(V
DD
=5.0V±10%, VSS=0V, Ta=-20 to 75˚C)
XSCL
LP
DO
AC Characteristics
Read Cycle
t
cycE
t
WEH
trE, t
fE
t
AS
t
AH
t
RD
t
DHR
Symbol
500
220
—
40
10
—
20
Min.
—
—
—
—
—
—
—
Typ.
—
—
25
—
—
120
—
Max.
ns
ns
ns
ns
ns
ns
ns
Unit
CL=100pF
Condition
Enable cycle time
Enable "H" level pulse width
Enable rise/fall time
RS, R/W setup time
RS, R/W address hold time
Read data output delay
Read data hold time
Characteristic
(VDD=5.0V±10%, VSS=0V, Ta=-20 to 75˚C)
t
cycE
t
WEH
trE, t
fE
t
AS
t
AH
t
DS
t
DH
Symbol
500
220
—
40
10
60
10
Min.
—
—
—
—
—
—
—
Typ.
—
—
25
—
—
—
—
Max.
ns
ns
ns
ns
ns
ns
ns
UnitCondition
Enable cycle time
Enable "H" level pulse width
Enable rise/fall time
RS, R/W setup time
RS, R/W address hold time
Data setup time
Write data hold time
Characteristic
(VDD=5.0V±10%, VSS=0V, Ta=-20 to 75˚C)
Page 4
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 NoteRS 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)
( )
Don‘t care
Page 5
5
SED1278F/D
20
±0.1
25.6
±0.4
4164
14
±0.1
19.6
±0.4
25
40
INDEX
0.35
±0.1
241
80
65
2.7
±0.1
0.26
3.4
max
2.8
1.5
0°
12°
0.15
±0.05
0.8
Plastic QFP5-80pin
Unit: mm
PACKAGE DIMENSIONS
LCD PANEL INTERFACE EXAMPLE (2 lines 20 characters)
SED1278F/D
COM1
COM16
…
SEG1
SEG40
…
SEG0
SEG59
…
LCD
OPEN
DO DO1
D1
DO0
DO
LP
XSCL
FR
V
DD
V
SS
R
f
V2
V3
V5
LP
XSCLFRVDDVSSV2V3V
SSH
OSC1 OSC2
16
40 60
16 100 dots
SED1181F/D
LA
SED1278F/D is usually connected to 8-bit MPU via I/O ports.
Page 6
SED1278F/D
6
SED1278D
PAD LAYOUT
PAD COORDINATION
24
41
1
64
25
40
80
X
Y
65
(0, 0)
4,500
Monitor Pad
Pad size: 109 109
3,670
Unit: m
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
SEG22
SEG21
SEG20
SEG19
SEG18
SEG17
SEG16
SEG15
SEG14
SEG13
SEG12
SEG11
SEG10
SEG9
SEG8
SEG7
SEG6
SEG5
SEG4
SEG3
SEG2
SEG1
GND
OSC1
OSC2
V
1
V
2
2,087
1,905
1,723
1,541
1,359
1,177
995
814
633
452
272
91
-91
-272
-452
-633
-814
-995
-1,177
-1,359
-1,541
-1,723
-1,905
-2,087
1,671
1,365
1,183
1,001
Pad No. Pad Name X Y
Unit: m
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
COM9
COM10
COM11
COM12
COM13
COM14
COM15
COM16
SEG40
SEG39
SEG38
SEG37
SEG36
SEG35
SEG34
SEG33
SEG32
SEG31
SEG30
SEG29
SEG28
SEG27
SEG26
SEG25
SEG24
SEG23
452
633
814
995
1,177
1,359
1,541
1,723
1,905
2,087
-1,671
-1,365
-1,183
-1,001
-819
-637
-455
-273
-91
91
273
455
637
819
1,001
1,183
1,365
Pad No. Pad Name X Y
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
V
3
V
4
V
5
LP
XSCL
V
CC
FR
DO
RS
R/W
E
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
COM1
COM2
COM3
COM4
COM5
COM6
COM7
COM8
-2,087
-1,905
-1,723
-1,541
-1,359
-1,177
-995
-814
-633
-452
-272
-91
91
272
819
637
455
273
91
-91
-273
-455
-637
-819
-1,001
-1,183
-1,365
-1,671
Pad No. Pad Name X Y
Page 7
7
SED1278F/D
SED1278DOA CHARACTER FONT
Page 8
SED1278F/D
8
SED1278F
OB/DOB
CHARACTER FONT
Page 9
9
SED1278F/D
SED1278F
OC/DOC
CHARACTER FONT
Page 10
SED1278F/D
10
SED1278FOD/
DOE CHARACTER FONT
Page 11
11
SED1278F/D
SED1278F
OG/DOG
CHARACTER FONT
Page 12
SED1278F/D
12
SED1278F
OH/DOH
CHARACTER FONT
Page 13
13
SED1278F/D
ELECTRONIC DEVICES MARKETING DIVISION
IC Marketing & Engineering Group
ED International Marketing Department I (Europe & U.S.A.)
421-8, Hino, Hino-shi, Tokyo 191-8501, JAPAN
Phone: +81-(0)42-587-5812 Fax: +81-(0)42-587-5564
ED International Marketing Department II (Asia)
421-8, Hino, Hino-shi, Tokyo 191-8501, JAPAN
Phone: +81-(0)42-587-5814 Fax: +81-(0)42-587-5110
NOTICE
No part of this material may be reproduced or duplicated in any form or by any means without the written permission of Seiko
Epson. Seiko Epson reserves the right to make changes to this material without notice. Seiko Epson does not assume any liability
of any kind arising out of any inaccuracies contained in this material or due to its application or use in any product or circuit and,
further, there is no representation that this material is applicable to products requiring high level reliability, such as, medical
products. Moreover, no license to any intellectual property rights is granted by implication or otherwise, and there is no
representation or warranty that anything made in accordance with this material will be free from any patent or copyright
infringement of a third party. This material or portions thereof may contain technology or the subject relating to strategic products
under the control of the Foreign Exchange and Foreign Trade Control Law of Japan and may require an export license from the
Ministry of International Trade and Industry or other approval from another government agency.
All product names mentioned herein are trademarks and/or registered trademarks of their respective companies.
©Seiko Epson Corporation 1999 All rights reserved.
Loading...