Specifications

EPSON 9–1
SED1278
SED1278
FEATURES
• Interface for 4- and 8-bit MPUs
• Display RAM – 80 bytes (80 characters)
• Character generator ROM – 240 characters
–5×8 pixel font
• Character genrator RAM – 64 bytes
–5×8 pixel font, 8 characters.
–5×10 pixel font, 4 characters.
• Number of characters used
• Powerful display control instructions
• LCD driver outputs
– 40 segment driver outputs
– 16 common driver outputs
• Low LCD drive voltage – 3 V minimum (V
DD–V5)
• Dual-frame AC drive
• On-chip power-on reset
• On-chip RC oscillator
• Single 5 V operation
• Chip (SED1278D) and 80-pin QFP (SED1278F)
packages
(Compatible with HD 44780 and HD 66780 by Hitachi
Limited)
The SED1278 is equivalent to the HD 44780 and HD
66780 by Hitachi Limited. Before use, make sure that
there is no problem for practical use. It should be
noted that this is not intended to guarantee enforcement
of industrial property and other rights, or to grant
license for the use of this product.
OVERVIEW
The SED1278 is a dedicated character display controller/
driver which, when used with the SED1181F or the
SED1681 segment drivres, is able to display up to 80
characters under 4- or 8-bit MPU control.
The internal character generator (CG) ROM has an
extended 240, 5×10 pixel, character set, plus CGRAM
space for an additional eight user definable 5×8 pixel
characters. These memory features combined with the
rich set of control instructions offer the potential for a
highly flexible character display system.
The SED1278 features a guaranteed minimum LCD
drive voltage of 3 V making it suitable for use with low
voltage LCD panels.
Duty SED1278F SED1181FLA
No. of
characters used
One-line 1/8, 1 0 8 columns
display 1/11 × 1 line
6 80 columns
× 1 line
Two-line 1/16 1 0 8 columns
display × 2 lines
3 40 columns
× 2 lines