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Epson SED1278F/D Product Manual

Epson dot matrix lcd controller driver product manual.
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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 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
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
6 Kinds of character font
Single power supply ................... 5V 10% (Logic)
Low LCD driving voltage ............ V
Package ..................................... SED1278F: QFP5-80pin (plastic)
BLOCK DIAGRAM
DB0
DB7
E
R/W
RS
V
DD
V
SS
V1
V2
V3
V4
V5
Dot Matrix LCD Controller Driver
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)
2 lines, 80 characters
(When accompanied with SED1181F
7 dots+Cursor line (5
5
10 dots+Cursor line
> = 3.0V
-V
DD
5
SED1278D: Die form (Al pad)
Cursor/
Instruction Decoder
Brink Control
Address
Instruction Register
Counter ACC
8
7
Data Register
8
Display Data RAM
M P X
Character
Generator
8
RAM
(CG RAM)
64 Bytes
5 10
5
M P X
5
Parallel/Serial
Data Converter
SEIKO EPSON CORPORATION
SED1278F/D
1 line
/D
, SED1681F
LA
LA
8 dots also possible)
OSC1 OSC2
Oscillation
Refresh Address Counter
Circuit
7
M P X
Timing Generator
DD RAM
Shift Register 16 Bits
80 Bytes
Common Driving
Output Circuit
8
Character
Generator
Segment Driving
RAM
Output Circuit
(CG RAM)
240 Byts
5
Latch Circuit
40 Bits
Shift Register
40 Bits
PF282-07
SED1278F/D
ROM 240 characters
)
RAM
8 characters
/D
)
OA
OA
XSCL
LP
FR
COM1
COM16
SEG1
SEG40
D0
1

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   Summary of Contents for Epson SED1278F/D

  • Page 1

    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.

  • Page 2: Pin Configuration

    SED1278F/D PIN CONFIGURATION QFP5-80pin SEG38 SEG37 SEG36 SEG35 SEG34 SEG33 SEG32 SEG31 SEG30 SEG29 SEG28 SEG27 SEG26 SEG25 SEG24 SEG23 PIN DESCRIPTION Symbol No. of signals DB0 to DB7 XSCL COM 1 to COM16 SEG1 to SEG40 V1 to V5...

  • Page 3: Electrical Characteristics

    =0 to V Rf oscillation, from external clock =5V, fosc=f =270kHz =91K Ceramic filter Condition Min. — =100pF — Condition Min. — SED1278F/D =5.0V 10%, V =0V, Ta=-20 to 75˚C) Min. Typ. Max. Unit — — -1.0 — — — — —...

  • Page 4

    SED1278F/D Timing Chart Read Cycle DB0 to DB7 Write Cycle DB0 to DB7 DISPLAY COMMAND Parameter RS R/W DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0 CLEAR DISPLAY CURSOR HOME ENTRY MODE SET DISPLAY ON/OFF CURSOR/DISPLAY SHIFT SYSTEM SET SET CGRAM ADDRESS...

  • Page 5

    PACKAGE DIMENSIONS Plastic QFP5-80pin LCD PANEL INTERFACE EXAMPLE (2 lines SED1278F/D COM1 COM16 SEG1 SEG40 XSCL OSC1 OSC2 SED1278F/D is usually connected to 8-bit MPU via I/O ports. 25.6 INDEX 0.35 0.15 0.05 20 characters) 100 dots OPEN … SED1181F/D...

  • Page 6

    SED1278F/D SED1278D PAD LAYOUT PAD COORDINATION Pad No. Pad Name SEG22 2,087 1,671 SEG21 1,905 SEG20 1,723 SEG19 1,541 SEG18 1,359 SEG17 1,177 SEG16 SEG15 SEG14 SEG13 SEG12 SEG11 SEG10 SEG9 -272 SEG8 -452 SEG7 -633 SEG6 -814 SEG5 -995...

  • Page 7

    SED1278F/D SED1278D CHARACTER FONT...

  • Page 8

    SED1278F/D SED1278F CHARACTER FONT...

  • Page 9

    SED1278F/D SED1278F CHARACTER FONT...

  • Page 10

    SED1278F/D SED1278F CHARACTER FONT...

  • Page 11

    SED1278F/D SED1278F CHARACTER FONT...

  • Page 12

    SED1278F/D SED1278F CHARACTER FONT...

  • Page 13

    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...

This manual also for:

Sed1278f, Sed1278d

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