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Sharp Electrionic Components
Sharp Electrionic Components

LM20A21 Datasheet

Dot Matrix LCD Unit


LM20A21 Datasheet Preview


PREPARED BY:
DATE
APPROVED BY:
DATE
,
SHARP
ELE~ONIC COMPONENTS CROUP
SHARP CORPORA~ON
SPECIFICATION
SPEC No.
F I L E NO.
LC63709
ISSUE
Jul. 11,1988
PAGE 14 Paqes
REPRESENTATIVE DIVISION
fJ IC D[V.
O SEMICONDUCTOR APPLICATION
= LCD DIV.
DIV.
Cl ELECTRONIC COMPONENTS DIV.
a
< DEVICE SPECIFICATION FOR
Dot Matrix LCD Unit
(20-character/2-line Display
STHC gray type)
,MODEL No.
LM20A21
*
CICUSTOMER’S APPROVAL
DATE
BY
PRESENTED
BY~
% cc- ,>,’ M&
H. NakajiinaV
Department General Manager
Engineering Department
LCD Division
ELECOM Group
SHAW COWOWTION
Page 1

..
MODEL No.
PAGE
LM20A21
1
Lf120A21
1. Overview
T h e LM20A21, d o t - m a t r i x L C D u n i t c o n s i s t s o f a 5 x 7 - d o t 2 0 - c h a r a c t e r 2 - l i n e
dot-matrix LCD panel, LCD driver and controller LSI fabricated on a single PCB.
I n c o r p o r a t i n g m a s k ROtl-based c h a r a c t e r g e n e r a t o r a n d d i s p l a y d a t a RAM in the
controller LSI, the unit can efficiently display the desired characters under
microprocessor control.
(Features)
(1) The LCD of the unit is STHC(Super T w i s t e d H i g h C o n t r a s t ) g r a y t y p e .
(2) Low power consumption with the dot-matrix LCD panel and CMOS L S I .
(3) T h i n , l i g h t w e i g h t d e s i g n p e r m i t s e a s y i n s t a l l a t i o n i n a varie~y o f
equipment.
(4) Allowing for being connected at general-purpose CMOS signal level, the unit
can be easily interfaced to a microprocessor with common 4-bit and 8-bit
parallel inputs and outputs.
(5) Built-in character generator ROM and RAM, and display data RAM:
C h a r a c t e r .generator ROM
160 different 5 x 7 dot-matrix character patterns
(Alphanumeric and symbols)
C h a r a c t e r g e n e r a t o r RAM
8 different user programmed 5 x 7 dot-matrix patterns
D i s p l a y d a t a RAM
80 x 8 bits
(6) Numerous instructions
Display clear, Cursor home, Display ON/OFF, Cursor ON/OFF, Blink
character, Cursor shift, Display shift
(7) Built-in reset circuit is triggered at power ON.
(For the operating conditions, r e f e r t o t h e s e p a r a t e u s e r ’ s manual
“Dot-Matrix LCD Units with built-in controllers”.)
(8) The unit operates from a single 5V power supply.
* As to the packing,refer t o t h e s e p a r a t e
“COMMON PACKING SPECIFICATION FOR LM20255 series”.
Page 2

MODEL No.
LM20A21
PAGE
2
2. Construction and Outline
Construction :
5 x 7 dots + cursor, 20-character 2-line dot-matrix display
unit
Outline :
See Fig. 7.
Interface signals : See Table 5.
Character pattern details :
See Fig. 7.
Character codes :
See Table 8.
There shall be no scratches, stains, chips, distortions and other externa
drawbatks t h a t m a y a f f e c t t h e d i s p l a y f u n c t i o n .
R e j e c t i o n c r i t e r i a s h a l l b e n o t e d i n I n s p e c t i o n S t a n d a r d ( s-u- 009 ).
3. Mechanical Specifications
Table 1
Parameter
Outline dimensions
Effective display area
Display format
Chiracter f o r m a t
Character size
Dot size
Dot spacing
Character color *
Background color*
Weight
Specification
I15(W) X 36(H) X11 HAX(D)
83(W) X 18.6(H)
20 characters X 2 lines
5 X 7 dots with cursor
3.2(W) X 4.85(H)(5 X 7 dots)
0.6(W) X 0.65(H)
0.05
Dark blue
Gray
Approx. 40
Unit
mm
mm
mm
mm
mm
g
* Due to the characteristics of the LC Material, the colors vary with
environmental temperature.
Page 3
Part Number LM20A21
Manufactur Sharp Electrionic Components
Description Dot Matrix LCD Unit
Total Page 15 Pages
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