SED1278F Datasheet, PDF (1/13 Pages) Epson Company – Dot Matrix LCD Controller Driver

PF282-07
SED1278F/D
Dot Matrix LCD Controller Driver
q 1/8, 1/11 or 1/16 Duty Dot Matrix Drive
q
Built-in
Character
Generator
ROM
and
RAM
(^RROAMM
240
8
characters
characters
)
q Maximum Simultaneous Display of 80 Characters
(With extension LCD driver)
s 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.
s FEATURES
q Display RAM .............................. 80 bytes (80 characters)
q Character generator ROM .......... 240 characters (Able to 256 characters)
q Character generator RAM .......... 8 characters
q Built-in CR oscillator, Built-in power-on reset circuit
q Maximim display dimension ....... 40 characters52 lines, 80 characters51 line
(When accompanied with SED1181F_LA/D_LA, SED1681F_OA/D_OA)
q 1/8, 1/11 or 1/16 duty matirx drive (fixed by command)
q 2 flame AC wave-form drive
q High-speed bus interface with 4-bit/8-bit MPU
q Powerful display control instructions
q Character ................................... 5!7 dots+Cursor line (5!8 dots also possible)
5!10 dots+Cursor line
q 6 Kinds of character font
q Single power supply ................... 5V±10% (Logic)
q Low LCD driving voltage ............ V_DD—V₅≥.0V
q Package ..................................... SED1278F: QFP5-80pin (plastic)
SED1278D: Die form (Al pad)
s BLOCK DIAGRAM
DB0
DB7
E
R/W
RS
V_DD
V_SS
V1
V2
V3
V4
V5
Instruction Decoder
Instruction Register
8
Data Register
8
Cursor/
Brink Control
OSC1 OSC2
Address
Counter ACC
Refresh Address Counter
7
Oscillation
Circuit
7
MPX
Timing Generator
Display Data RAM
DD RAM
80 Bytes
Shift Register 16 Bits
MPX
Common Driving
Output Circuit
8
Character
Character
8
Generator
RAM
Generator
RAM
(CG•RAM)
(CG•RAM)
64 Bytes
5!10!!240 Byts
5
5
MPX
5
Parallel/Serial
Data Converter
Segment Driving
Output Circuit
Latch Circuit
40 Bits
Shift Register
40 Bits
XSCL
LP
FR
COM1
COM16
SEG1
SEG40
D0
1