IEE SLB324-14XI User manual

APPLICATION REVISIONS
NEXT ASSY FINAL ASSY LTR DESCRIPTION DATE APPROVED
- PRODUCTION RELEASE/E.O. 32901 7-21-97 D. Goodale
AE.O. 33241 10-14-97 B. Lo
BE.O. 33304 11-4-97 D. Goodale
CE.O. 37192 8-13-02 B. Lo
DE.O.
LIQUID CRYSTAL DISPLAY
SPECIAL THAI CHARACTERS
MODEL LB324-04XI
MODEL LB324-14XI
REV DBDB B DDDDDDDDDDDDD
SHEET 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
REVISION STATUS
PROJ. NO. 368 CONTRACT INDUSTRIAL ELECTRONIC ENGINEERS, INC.
VAN NUYS, CALIFORNIA
DRAWN R. January LIQUID CRYSTAL DISPLAY
CHECK D. Summers 8-18-97 SPECIAL
NOTICE IS HEREBY GIVEN THAT THIS DRAWING IS PART
OF A PROPRIETARY ITEM OWNED BY INDUSTRIAL APPROVED SIZE CODE IDENT NO.
ELECTRONIC ENGINEERS, INC. AND SHALL NOT BE
REPRODUCED, OR COPIED OR USED AS THE BASIS FOR
MANUFACTURE OR SALE OF APPARATUS WITHOUT
D. Goodale 7-21-97 A05464 SLB324-X4XI
WRITTEN PERMISSION OF I.E.E. INC. APPROVED SCALE SHEET 1OF 18

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TABLE OF CONTENTS
PARAGRAPH NUMBER & TITLE
1.0 GENERAL DESCRIPTION
1.1 Introduction
1.2 Application
1.3 Special Features
1.4 Description
2.0 BLOCK DIAGRAM
3.0 THEORY OF OPERATION
4.0 OPERATION
4.1 Loading ASCII Character Data
4.2 Control Codes
4.3 Character Chart
4.4 Overlay Character Codes
4.5 User Defined Characters
4.6 Dedicated Hardware Lines
4.7 Serial Data and Self-test
4.8 Connector Pin Assignments
5.0 ELECTRICAL CHARACTERISTICS
5.1 Power ON / OFF Sequence
5.2 Interface Signals
5.3 Absolute Maximum Ratings
5.4 Normal Operating Ratings
6.0 OPTICAL CHARACTERISTICS
7.0 ENVIRONMENTAL CHARACTERISTICS
8.0 FIBER OPTIC BACKLIGHT
9.0 ACCESSORIES
10.0 OUTLINE & INSTALLATION DRAWING

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1.0 GENERAL DESCRIPTION
1.1 Introduction
This specification describes the interface requirements and features of a 2 line Liquid Crystal Display (LCD) ,
15 characters wide. The characters are formed using a 8x18 dot matrix.
1.2 Application
This unit may be used as a console display which provides alphanumeric information that is easily readable in
high ambient light or with the backlight in low light conditions. It is ideal for point-of-sale terminals, office
computers, and a wide range of business and industrial equipment.
1.3 Special Features
Thai character set Wide operating temperatures (-20 to +70°)
Power and data on same connector EIA-232C data interface
12-29 Volt Operation EIA-422A data interface
Low cost Software self test
Shielded I/O Connector standard Minimum depth
4 canned messages, 500 bytes each
1.4 Description
This LCD is a self-contained multiplexed unit which provides a simple interface to a microprocessor system.
The display is available with one I/O connector and a choice of either EIA-232C or EIA-422A interfacing.
EIA-232C = Model LB324-04XI
EIA-422A = Model LB324-14XI
This unit consists of a liquid crystal display cell and a minimal amount of electronic hardware. All display
characters and control codes can be accessed in a 8-bit format. Primary complexity is contained within the
microprocessor software, which controls all display functions.
A single 12-29 volt power supply is required for operation. At +12VDC, total power is approximately .72 watts
and current is about 60mA.
Data is entered serially at 9600 Baud at rates determined by execution times.
The large characters are easily readable, even in direct sunlight and provide comfortable short or long-term
viewing.
Figures 3, 4, and 5 depict the character sets used in this module.

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2.0 BLOCK DIAGRAM
LEVEL CONVERTERS
LCD CELL
ROW DRIVER
SHIFT REGISTER
SHIFT REGISTER
DEDICATED
ON-BOARD
MICROPROCESSOR
CONTROLLER
ON-BOARD
DC-TO-DC
VOLTAGE
CONVERTER
FOR LIQUID CRYSTAL
DISPLAY CELL
DRIVE VOLTAGES
DTR
CTS
TX
RX
EIA-232
RETURN
RX -
RX +
TX +
TX -
OR
EIA-422
+12VDC
LEVEL CONVERTERS
COLUMN
FIGURE 1

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3.0 THEORY OF OPERATION
Liquid Crystal Displays utilize ambient light falling on the display to reflect the image to the observer. The
LCD cell is constructed by sandwiching a liquid crystal mixture between two glass plates that are coated with
a polarizer, and lined with transparent electrodes. A selectively applied electric field aligns the nematic
molecules (crystals) so that they either transmit or block the polarized light from being reflected back out of
the cell to the viewer.
This display consists of two display areas, each comprising a matrix of 18 x 120 dots, to display four lines of
characters. A matrix addressing technique provides individual control of the electric field applied to each dot
used to create the character. A standard character is generated within a 8 x 18 dot matrix. A unselected dot
passes the light which reflects back appearing as a yellow-green background. Selected dots block the light
to create the lines of the dark blue characters. The 18 high dot columns allow for creation of special
characters and fonts. Liquid crystal displays have several advantages over other display technologies. LCDs
operate from low voltage and power, are viewable in direct sunlight, have long life, and are more economical to
manufacture.
FIGURE 2

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4.0 OPERATION
4.1 Loading ASCII Character Data
All printing characters are located in standard ASCII code locations from 20 (HEX) to FF (HEX). Control
character assignments are as follows.
4.2 Control Codes
NOTE: CARE SHOULD BE TAKEN NOT TO SEND UNDEFINED CONTROL OR COMMAND CODES TO
THE DISPLAY MODULE AS THIS MAY CAUSE A SOFTWARE MALFUNCTION OF THE MODULE.
4.2.1 Instruction
DATA (HEX) DESCRIPTION
01 READING THE CHARACTER CAPACITY OF THE DISPLAY (DISPLAY RESPONDS
SENDING 1E (HEX))
02 DISPLAY SOFTWARE CHECKSUM AND SOFTWARE NUMBER
03 READ CURSOR LOCATION VALUE (DISPLAY RESPONDS WITH 1 BYTE)
FOR 8 x 18 DOT CHARACTERS FOR 5 x 8 DOT CHARACTERS
01-0F (HEX) FOR LINE 1 01-14 (HEX) FOR LINE 1
21-2F (HEX) FOR LINE 2 21-34 (HEX) FOR LINE 2
41-54 (HEX) FOR LINE 3
61-74 (HEX) FOR LINE 4
04 READ DATA AT PRESENT CURSOR LOCATION
05-H1-H2-3A-MI-M2-CR: Enable the display of the internal clock and the changing of the internal
clock contents.
“H1-H2-3A-M1-M2” is an optional parameter that to replace the original
internal clock data.
H1=30 hex to 32 hex (HOUR)
H2=30 hex to 39 hex (HOUR)
3A=”:”
M1=30 hex to 35 hex (MINUTE)
M2=30 hex to 39 hex (MINUTE)
CR=0D hex
06 BEGIN BLINK FIELD AT CURRENT CURSOR LOCATION
07 END BLINK FIELD AT CURRENT CURSOR LOCATION
08 BACKSPACE CURSOR LOCATION ONE POSITION (cursor stays when at HOME location)
09 ADVANCE CURSOR LOCATION ONE POSITION (cursor wraps around after bottom right
character location)
0ALINE FEED (vertical scroll from bottom line; cursor position does not change)
0C CLEAR THE DISPLAY (cursor stays)

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4.2.1 Instruction (Cont’d)
DATA (HEX) DESCRIPTION
0D CARRIAGE RETURN (returns cursor to left-most character position of the same line;
does not clear display)
0E MAKE CURSOR INDICATOR INVISIBLE (the cursor location counter continues to function
but there is no visible indicator of next character location)
0F + MAKE CURSOR INDICATOR VISIBLE, FLASHING BLOCK
<10> BOTTOM LINE DATA ENTRY WITH AUTOMATIC CARRIAGE RETURN & LINE FEED
(puts cursor a left side bottom row and data enters beginning at the left-most character
position of the bottom row, vertical scroll from bottom line after line has been filled)
<11> + NORMAL DATA ENTRY WITH AUTOMATIC CARRIAGE RETURN AND LINE FEED
(data enters beginning at the home position, vertical scroll from bottom line after line
has been filled)
<12> OVERWRITE OF RIGHT-MOST CHARACTER ON THE PRESENT LINE/AUTOMATIC
CARRIAGE RETURN OFF
<13> HORIZONTAL SCROLL MODE (from right to left on bottom line only, after line has been
filled)
14 RESET (goes to system default settings and clears all DOWN LOAD CHARACTERS)
15 + DISPLAY CLEAR (puts cursor at left side bottom row in Mode 10 HEX, & home in Modes
11 HEX, 12 HEX, 13 HEX and 1A HEX)
16 + CURSOR HOME (returns cursor to upper left-most position)
17 BACKLIGHT ON
18 + BACKLIGHT OFF (Blinks ON momentarily during power-up)
19-NN DISPLAY AND EXECUTE MESSAGE
NN=01 TO 04 MESSAGE NUMBER
<1A> WRAP AROUND DATA ENTRY:
(After bottom right character enters, cursor moves to home position)
0B-NN-XX-XX- . . . . XX-CR STORE MESSAGES COMAND.
NN=01 TO 04 MESSAGE NUMBER
XX . . . . XX = MESSAGE. (MAX. = 500 BYTES)
CR = CARRIAGE RETURN = 0D HEX
1B 1B-05-49 IEE SPECIFIC RESPONSE CODE
(Sent without regard for flow control)
D,2,IEE,36368,-03 (CR) (18 BYTES)
1B-26-01-M-N DEFINE DOWN LOAD CHARACTERS (5x8 DOT CHARACTER ONLY)
M=BYTE LOCATION TO BEGIN DOWNLOAD (20 to FF)
N=NUMBER OF CHARACTERS TO BE DOWNLOADED (01 to 08)
EACH CHARACTER PATTERN IS 5 BYTES (See 4.5)

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4.2.1 Instruction (Cont’d)
DATA (HEX) DESCRIPTION
1B-3D-N N=01 The display is not selected. All the data from the host is not
processed in the display.
+N=02 The display is selected. All the data from the host is processed in
the display.
1B-3F-N DELETE DOWNLOAD CHARACTER LOCATION N (N=20-FF)
1B-40 TERMINATE SELF TEST (all configurations go to default setting
and clear all DOWN LOAD CHARACTERS)
1B-52-N SELECT OVERLAY CHARACTER SET COUNTRY
+N=00H USA
N=01H FRANCE
N=02H GERMANY
N=03H GREAT BRITAIN
N=04H DENMARK 1
N=05H SWEDEN
N=06H ITALY
N=07H SPAIN
N=08H JAPAN
N=09H NORWAY
N=0AH DENMARK 2
1B-74-N SELECT CHARACTER SET (change character set will set cursor home)
N=01 ASCII AND GENERAL EUROPEAN (5x8 DOT)
+N=02 THAI (8x18 DOT)
1B-74-N SELECT CHARACTER SET (change character set will set cursor home)
N=01 ASCII AND GENERAL EUROPEAN (5x8 DOT)
+N=02 THAI (8x18 DOT)
<1C>-XX-XX-. . . . XX-0D DISPLAY TOP ROW MESSAGE CONTINUOUSLY SCROLLING
LEFT UP TO 80 ASCII CODES (Any further input data will stop the
scrolling and clear the row)
1D-TT DELAY SECONDS
TT=01-0A DELAY 1 TO 10 SECONDS
<1E>-XX-XX-. . . . XX-0D DISPLAY BOTTOM ROW MESSAGE CONTINUOUSLY SCROLLING
LEFT UP TO 80 ASCII CODES (Any further input data will stop the
scrolling and clear the row)
1F 1F-24-C-L MOVE CURSOR TO COLUMN C LINE L
FOR 8x18 THAI CHARACTERS: C=01-0F (HEX)
L=01-02 (HEX)
FOR 5x8 CHARACTERS: C=01-14 (HEX)
L=01-04 (HEX)

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4.2.1 Instruction (Cont’d)
DATA (HEX) DESCRIPTION
1F-40 EXECUTE SELF TEST (Use 1B-40 to terminate self test)
1F-45-T SET ALL DISPLAY BLINK FIELDS AT INTERVAL T
Tx50msec, 50% DUTY CYCLE
Tmax = 3F (HEX)
20 to 7F MAIN CHARACTER SET
80 to F7 ALTERNATE CHARACTER SET
+ Display automatically defaults to these conditions after power-up or reset.
< > These instructions are mutually exclusive

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4.3 Character Set Charts
4.3.1 8 x 18 Dot Matrix Characters
The LB324-X41Ioffer’s a Thai character set in a 8x18 dot matrix font (it displays 2 rows of 15 characters), and
a 5x8 ASCII character set in 4 rows of 20 characters.
FIGURE 3 - 8 x 18 THAI CHARACTER SET

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4.3.1 8 x 18 Dot Matrix Characters (Cont’d)
Thai vowel (80-98, D1, D4-D9, E7) and tone (E8-EC) should follow Thai consonant (A1-CF).
FIGURE 4 - 8 x 18 THAI CHARACTER SET

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4.3.2 5 x 8 Dot Matrix Characters
FIGURE 5 - 5 x 8 U.S. ASCII CHARACTER SET

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4.4 Overlay Character Codes

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4.5 User Defined Character Loading (5 x 8 Dot Matrix)
A maximum of eight characters may be created temporarily (until power-off or reset) by a user-defined down-
loaded character pattern. To do so, enter the following sequence of commands and data:
BYTE DESCRIPTION
1-3 Start load 1B-26-01 (HEX)
4 Location to begin download (20-FF hex)
5 Number of characters to download (01-08)
6-10 *Character dot data
*Repeat bytes 6-10 for the number of characters to be downloaded.
CHARACTER DOT DATA
BYTE # 7 6 5 4 3 2 1 0
6
7
8
9
10
36 31 26 21 16 11 6 1
37 32 27 22 17 12 7 2
38 33 28 23 18 13 8 3
39 34 29 24 19 14 9 4
40 35 30 25 20 15 10 5
CHARACTER MATRIX
1 2 3 4 5
6 7 8 9 10
11 12 13 14 15
16 17 18 19 20
21 22 23 24 25
26 27 28 29 30
31 32 33 34 35
36 37 38 39 40
Example: To download 1 Greek letter Psi for character F8.
1Bh BYTE 1, start load
26h BYTE 2, start load
01h BYTE 3, start load
F8h BYTE 4, location to begin download
01h BYTE 5, download 1 character
0Ch BYTE 6, Dots 16, 11 ON
91h BYTE 7, Dots 37, 22, 2 ON
FFh BYTE 8, Dots 38, 33, 28, 23, 18, 13, 8, 3 ON
91h BYTE 9, Dots 39, 24, 4 ON
0Ch BYTE 10, Dots 20, 15 ON

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4.6 Dedicated Hardware Lines
Not available.
4.7 Serial Data and Self-test
Serial characters are received with data formatted as a 10-bit word. The command set is structured to allow
transmission of 8 data bits. The data rate is fixed at 9600 baud. The level is EIA-232C.
(EIA-232) (LSB) (MSB)
+15 TO +3V
-15 TO -3V b0 b1 b2 b3 b4 b5 b6 b7
1 START BIT 8 DATA BITS 1 STOP BITS
Self-test is a very useful feature and can be activated by sending 1F-40 (HEX). The test may be terminated by
sending 1B-40 (HEX). Characters from 20 (HEX) to FB (HEX) will be displayed advancing through the
characters at approximately 2.0 characters per second. This self-test capability can be used to speed up
both in-field fault isolation and incoming receiving inspection.
4.8 Connector Pin Assignment
EIA-232C
J1 (RJ-45)*
PIN NO. FUNCTION
1SIGNAL GROUND
2,7 11-29 VOLTS
3TRANSMIT DATA (OUTPUT)
4DATA SET READY (INPUT)
5DATA TERMINAL READY (OUTPUT)
6RECEIVE DATA (INPUT)
8POWER RETURN
* Shielded connector is standard.
EIA-422A
J1 (RJ-45)*
PIN NO. FUNCTION
1SIGNAL GROUND
2,7 11-29 VOLTS
3TRANSMIT DATA (A+)
4TRANSMIT DATA (A-)
5RECEIVE DATA (A-)
6RECEIVE DATA (A+)
8POWER RETURN
* Shielded connector is standard.

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5.0 ELECTRICAL CHARACTERISTICS
5.1 Power ON / OFF Sequence
There are no deleterious effects associated with power ON and OFF of this display; however, rapid ON/OFF
sequencing is not recommended. Neither data nor power connectors should be connected/disconnected
while power is applied.
Because of the power-up cycle within the microprocessor, rise time of the power supply should be less than
100mS. The display module is not ready to accept data for 850mS (typ) - 1.2 sec (max).
5.2 Interface Signals
All logic signals abide by the following convention: logic "1" is a high, logic "0" is a low.
5.3 Absolute Maximum Ratings
EIA-232C: +15VDC to -15VDC
EIA-422A: +15VDC to -10VDC
5.4 Normal Operating Ratings
Primary voltage: 12-29 VOLTS DC
Power dissipation: 0.72 WATTS at 12.0 VDC

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6.0 OPTICAL CHARACTERISTICS
Format: 2 lines of 15 characters
Character height: .91 in. (23mm)
Character width: .35 in. (9mm)
Character spacing: .41 in. (10.4mm) center-to-center
Character design: 8 x 18 dot matrix and 5 x 8 dot matrix
Type of cursor indicator: FLASHING BLOCK
Character set: ASCII, Thai
Color: Dark blue characters on yellow-green background
Viewing angle: 100 degrees vertically, 90 degrees horizontally
6.1 Display Viewing/Contrast
This display has built-in temperature compensation circuitry and therefore should not require readjustment of
the contrast once it is set at the factory. Potentiometer R4 (when used) is adjusted to obtain 10.70 VDC at
22°C when measured from +5V to TP1.
7.0 ENVIRONMENTAL CHARACTERISTICS
Operating temperature: -20 to +70 (°C) -4 to 158 (°F)
Storage temperature: -40 to +70 (°C) -40 to +158 (°F)
Relative humidity: (≤40°C) 0 to 95% (non-condensing)
(≥40°C) Absolute humidity must be lower than the humidity of 95%
RH at 40°C
Vibration: 10G, 10-400Hz (3 axis)
Shock: 10G, 18ms
8.0 ACCESSORIES
IEE has a large selection of cable lengths and connector combinations available. The display enclosure is
available in several standard colors with multiple mounting methods and pole lengths. Contact IEE for
specifics.

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10.0 OUTLINE AND INSTALLATION DRAWING
FIGURE 6
TOLERANCE:
.XX = ±.03 (0.8)
.XXX = ±.010(0.25)
Dim. in inches (mm)