I
SHARP
LH1554M
l
Handle
document carefully
for it contains
material
protected
by international
Any reproduction,
full or in part, of this material
is prohibited
copyright
law.
without the express written
permission
of the company.
this
@When using the products covered herein,
please observe the conditions
written
herein
and the precautions
outlined
in the following
paragraphs.
In no event shall the
company be liable
for any damages resulting
from failure
to strictly
adhere to these
conditions
and precautions.
(1) The products. covered herein are designed and manufactured
for the following
application
areas.
When using the products covered herein for the equipment
listed
in Paragraph
(‘21, even for the following
application
areas, be sure
Never use the products
to observe the precautions
given in Paragraph
(2).
for the equipment
listed
in Paragraph
(3).
*Office electronics
*Instrumentation
and measuring equipment
*Machine tools
*Audiovisual
equipment
*Home appliances
*Communication
equipment other than for trunk lines
(2) Those contemplating
using the products covered herein for the following
equipment which demands high reliability,
should first
contact a sales
representative
of the company and then accept responsibility
for incorporating
into the design fail-safe
operation,
redundancy,
and other appropriate
measures for ensuring
reliability
and safety of the equipment
and the overall
sys ten.
*Control
and safety devices for airplanes,
trains,
automobiles,
and other
transportation
equipment
*Mainframe
computers
-Traffic
control
systems
*Gas leak detectors
and automatic
cutoff
devices
*Rescue and security
equipment
*Other safety devices and safety equipment,etc.
(3) Do not use the products covered herein for the following
equipment which
demands extremely
high performance
in terms of functionality,
reliability,
accuracy.
*Aerospace equipment
*Communications
equipment
for trunk lines
-Control
equipment
for the nuclear power industry
*Medical equipment
related
to life
support,
etc.
(4) Please direct
all queries and comments regarding
above three Paragraphs to a sales representative
*Please
direct
representative
all queries regarding
of the company.
the products
covered
the interpretation
of the company.
herein
to a sales
of the
or
L
SHARP
LHl554M
Contents
Page
1. Summary
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ..*.......
2
2
3
4
2. Features
3. Block
4. Pin
5. Pin
................................................
diagram
...........................................
.........................................
description
..................................................... 7
6. Functional
description
..................................
g
7. Command functions
8. Precaution
9. Absolute
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
24
25
25
25
31
32
..............................................
maximum
ratings
................................
10.
Recommended
11.
12.
operating
characteristics
output
timing
conditions
........................
Electrical
LCD driver
..............................
................................
13.
Typical
14.
applications
and Packing
....................................
Package
Specification
•=~~~~~~=~~*~~==.~~=~~~
35
~.-._.
SHARP
LH1554M
2
1. Summary
The LH1554H is a dot matrix
LC panel system segment driver
containing
80
outputs
and display.RAM.
The driver
stores the a-bit
parallel
display
data from the microcomputer
into the internal
display
RAM and then outputs
this RAM data as the LC
drive
signals.
Since each of the display
RAM data bits represents
1 dot on the LC panel,
various
display
patterns
data can be easily
generated
with minimum limits.
Low power consumption
and wide operating
voltage
enables
the chip to be
used as interface
to LC panel system on battery-powered
portable
informa-
tion equipment.
A dot matrix
LC display
system can be easily
configured
by using this chip
together
with the common driver
LH1531M (64 output
common driver).
2. Features
Display
modes : 2
Non-inverting
mode : RAM data “0” + dot off:RAM data “1” + dot on
Inverting
mode
: RAM data .l” + dot off;RAM data “0” --;, dot on
Display
RAM capacity
: 1024 bits(80
x 128)
. Internal
display
RAM address counter
Automatic
preset
of the display
start
address and automatic
address
increment
a-bit
parallel
interface
for direct
connection
to the bus of a a-bit
general
purpose microcomputer
(80 or 68 family)
Internal
LC drive circuits
: 80 outputs
Various
command capabilities
Display
duty ratio
settings
: selectable
3 types
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l/32.
l
l/64.
l/128
LC AC converting
signal
frequency
settings
: selectable
3 types
Frame frequency,
61 line
frequency,
13 line frequency
. Display
start
line
setting
: in unit of line
Display
on/off
control
Inverting
display/non-inverting
display
control
Display
RAM read/write
Display
RAM address
increment
control
Forward/reverse
output
control
of display
drive signal
.Status read
Automatic
80-bit
display
data transfer
from display
RAM to display
latch
Power supply
Logic circuit
:
2.5
V to +5.5 V
LC drive
: +lO v to +30 v
Package : 112PIN QFP
CMOS silicon
gate process(P-silicon
substrate)
. Not designed
or rated as radiation
hardened
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data
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MCU
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