PF282-07
SED1278F/D
Dot Matrix LCD Controller Driver
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1/8, 1/11 or 1/16 Duty Dot Matrix Drive
ROM 240 characters
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Built-in Character Generator ROM and RAM (
RAM 8 characters
)
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Maximum Simultaneous Display of 80 Characters
(With extension LCD driver)
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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 558 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.
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FEATURES
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Display RAM .............................. 80 bytes (80 characters)
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Character generator ROM .......... 240 characters (Able to 256 characters)
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Character generator RAM .......... 8 characters
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Built-in CR oscillator, Built-in power-on reset circuit
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Maximim display dimension ....... 40 characters52 lines, 80 characters51 line
(When accompanied with SED1181F
LA
/D
LA
, SED1681F
OA
/D
OA
)
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1/8, 1/11 or 1/16 duty matirx drive (fixed by command)
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2 flame AC wave-form drive
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High-speed bus interface with 4-bit/8-bit MPU
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Powerful display control instructions
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Character ................................... 5!7 dots+Cursor line (5!8 dots also possible)
5!10 dots+Cursor line
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6 Kinds of character font
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Single power supply ................... 5V±10% (Logic)
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Low LCD driving voltage ............ V
DD
—V
5
≥.0V
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Package ..................................... SED1278F: QFP5-80pin (plastic)
SED1278D: Die form (Al pad)
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BLOCK DIAGRAM
OSC1 OSC2
Instruction Decoder
I/O Buffer
Instruction Register
8
7
8
I/O Control
E
R/W
RS
Cursor/
Brink Control
Address
Counter ACC
Oscillation
Circuit
Refresh Address Counter
7
M P X
DB0
DB7
Data Register
Timing Generator
XSCL
LP
FR
Display Data RAM
DD RAM
80 Bytes
Shift Register 16 Bits
Common Driving
Output Circuit
COM1
M P X
8
COM16
SEG1
V
DD
V
SS
V1
V2
V3
V4
V5
8
Character
Generator
RAM
(CG•RAM)
64 Bytes
Character
Generator
RAM
(CG•RAM)
5!10!!240 Byts
SEG40
Segment Driving
Output Circuit
5
M P X
5
5
Latch Circuit
40 Bits
Parallel/Serial
Data Converter
Shift Register
40 Bits
D0
1
EPSON [ EPSON COMPANY ]
