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.
(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)
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
>
VSS)
=
5
+5V
0V (GND)
Used to connect resistor (typ. 91K-ohms) for oscillation;
OSC1 is for external clock input.
Unit: mm
1
1
RS
R/WEOperation
0
0
1
1
ABSOLUTE MAXIMUM RATINGS
Rating
Supply voltage (1)
Supply voltage (2)
Input voltage
Output voltage
Power dissipation
Operating temperature
Storage temperature
Soldering temperature and time
Note: The following condition must always hold true: V
"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
Symbol
V
IH1
V
IL1
V
IH2
V
IL2
V
OH1
V
OL1
V
OH2
V
OL2
R
COM
R
SEG
I
IL
-I
P
Rf oscillation, from
Supply current
I
OP
external clock
V
External clock operation
External clock operating frequency
External clock duty
External clock rise time
External clock fall time
f
EXTCL
Duty
tr
EXTCL
tf
EXTCL
Internal clock operation (Rf oscillation)
Oscillation frequency
f
OSC
Internal clock operation (Ceramic filter oscillation)
Oscillation frequency
LCD driving voltage
V
f
OSC
LCD
Condition
I
=-0.205mA
OH
I
=1.6mA
OL
I
=-0.04mA
OH
=0.04mA
I
OL
COM-Vn
SEG-Vn
V
=0 to V
I
|=0.5V
|=0.5V
DD
|V
|V
VDD=5V
=5V, fosc=fCP=270kHz
DD
R
=91K ±2%
f
Ceramic filter
V
DD-V5
Applicable
Pin
DB0~DB7
RS, R/W, E
OSC1
DB0~DB7
XSCL
LP
DO
COM1~16
SEG1~40
V
DD
SED1278F/D
=5.0V±10%, VSS=0V, Ta=-20 to 75˚C)
(V
DD
Min.
2.0
V
VDD-1.0
V
2.4
0.9V
125
190
245
3.0
—
—
—
—
—
50
—
45
SS
SS
-
-
DD
Typ.
—
—
—
—
—
—
—
—
2
2.5
—
125
0.5
250
50
—
—
270
250
—
Max.
V
0.8
V
1.0
0.4
0.1V
10
10
250
0.8
350
55
0.2
0.2
350
255
V
DD
DD
—
—
DD
1
DD
Unit
V
V
V
V
V
V
V
V
k
k
A
A
mA
kHz
%
S
S
kHz
kHz
V
AC Characteristics
Read Cycle
Characteristic
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
Write Cycle
Characteristic
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
Symbol
t
cycE
t
WEH
trE, t
fE
t
AS
t
AH
t
RD
t
DHR
Symbol
t
cycE
t
WEH
trE, t
fE
t
AS
t
AH
t
DS
t
DH
Condition
CL=100pF
(VDD=5.0V±10%, VSS=0V, Ta=-20 to 75˚C)
Min.
500
220
—
40
10
—
20
Typ.
—
—
—
—
—
—
—
Max.
—
—
25
—
—
120
—
(VDD=5.0V±10%, VSS=0V, Ta=-20 to 75˚C)
Min.
500
220
—
40
10
60
10
Typ.
—
—
—
—
—
—
—
Max.
—
—
25
—
—
—
—
Unit
ns
ns
ns
ns
ns
ns
ns
UnitCondition
ns
ns
ns
ns
ns
ns
ns
3
SED1278F/D
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
Timing Chart
DISPLAY COMMAND
CLEAR DISPLAY
CURSOR HOME
ENTRY MODE SET
DISPLAY ON/OFF
CURSOR/DISPLAY SHIFT
SYSTEM SET
SET CGRAM ADDRESS
SET DDRAM ADDRESS
READ BUSY FLUG/
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)
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
SED1278F/D is usually connected to 8-bit MPU via I/O ports.
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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,
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