IEE SLB324-04XH User manual

APPLICATION REVISIONS
NEXT ASSY FINAL ASSY LTR DESCRIPTION DATE APPROVED
- PRODUCTION RELEASE/E.O. 32901 7/21/97 D. Goodale
AE.O. 34070
LIQUID CRYSTAL DISPLAY
2 X 6 CHINESE GB CHARACTER
SLB324-04XH
REV AAAAAAAAAAAAAAAA
SHEET 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48
REV AAAAAAAAAAAAAAAAAAAAAAAA
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 2 X 6 CHINESE GB CHARACTER
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 SLB324-04XH
WRITTEN PERMISSION OF I.E.E. INC. APPROVED SCALE SHEET 1OF 40

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04/26/04
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 User Defined Characters
4.5 Dedicated Hardware Lines
4.6 Serial Data and Self-test
4.7 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 ACCESSORIES
9.0 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) ,
6 characters wide. The characters are formed using a 16x16 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. It is ideal for point-of-sale terminals, office computers, and a wide range of business and
industrial equipment.
1.3 Special Features
Minimum depth 3 User defined character (16x16 dot)
Power and data on same connector 2 US-ASCII Character font (8x16 dot & 5x8 dot)
11-29 Volt Operation Chinese GB Character (16x16 dot)
Low cost EIA-232C data interface
Shielded I/O Connector standard EIA-422A data interface
Wide operating temperatures (-20 to +70°)Software self test
78 bytes receive buffer
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.
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 11-29 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.
Figure 3 depicts Chinese GB character set (16x16 dot) and Figure 4 depicts US-ASCII character (8x16 dot)
and Figure 5 depicts US-ASCII character (5x8 dot) 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 two 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 16 x 16 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 2 byte code for Chinese or 1 byte code for US ASCII. 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-L-C MOVE CURSOR TO LINE L COLUMN C
FOR 16x16 DOT CHARACTERS FOR 5x8 DOT CHARACTERS
L = 01-02 (HEX) L = 01-04 (HEX)
C = 01-06 (HEX) C= 01-14 (HEX)
04-L-C-D GRAPH MODE: DISPLAY 8 PIXEL DATA D ON LINE L COLUMN C
L = 01-24 (HEX)
C = 01-0F (HEX)
D=8 PIXEL DATA
example: 04-01-01-A3: turn on 1st, 3rd, 7th and 8th pixel from upper left corner
06 BEGIN BLINK FIELD AT CURRENT CURSOR LOCATION OR AT GRAPH MODE
07 END BLINK FIELD AT CURRENT CURSOR LOCATION OR AT GRAPH MODE
08 BACKSPACE CURSOR LOCATION ONE POSITION
(for 5x8 US-ASCII: cursor stays when at HOME location)
Wrap Around Mode When the cursor is at the top-left location, it is moved to the bottom-
right.
Vertical Scroll Mode When the cursor is at the top-left location, the characters on the top
line are scrolled to the bottom line and the top line is cleared. The
cursor is moved to the top-right location.
Horizontal Scroll Mode When the cursor is at the left end of either line, all characters on that
line are scrolled one character to the right. Cursor does not move.

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4.2.1 Instruction (Cont’d)
DATA (HEX) DESCRIPTION
09 ADVANCE CURSOR LOCATION ONE POSITION
(for 5x8 US-ASCII: cursor wraps around after bottom right character location)
Wrap Around Mode When the cursor is at the bottom-right location, it is moved to the
top-left.
Vertical Scroll Mode When the cursor is at the bottom-right location, the characters on the
bottom line are scrolled to the top line and the bottom line is cleared.
The cursor is moved to the bottom-left.
Horizontal Scroll Mode When the cursor is at the right end of either line, all characters on
that line are scrolled one character to the left. Cursor does not move.
0A *LINE FEED (cursor moves down one line in the same column)
The following is true for each display mode when the cursor is on the lower line.
Wrap Around Mode The cursor is moved to the top line on same column.
Vertical Scroll Mode The characters on the bottom line are scrolled to the top line and the
bottom line is cleared. Cursor does not move.
Horizontal Scroll Mode Cursor does not move.
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, UNDER BAR
(cursor is flashing block in 5x8 dot character)
<10> VERTICAL SCROLL MODE (vertical scroll from bottom line after line has been filled)
<11> +HORIZONTAL SCROLL MODE (from right to left on either line, after line has been
filled)
<12> WRAP AROUND DATA ENTRY:
(After bottom right character enters, cursor moves to home position)
14 RESET (goes to system default settings and clears all DOWN LOAD CHARACTERS)
15 +DISPLAY CLEAR AND CURSOR HOME
16 +CURSOR HOME (returns cursor to upper left-most position)

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4.2.1 Instruction (Cont’d)
DATA (HEX) DESCRIPTION
1B 1B-26-XX-YY-D1-D2....-D32 DEFINE DOWN LOAD CHARACTERS (16x16 DOT
CHARACTER ONLY)
XX-YY=UDC 2 byte code (A200 ~ FFFF)
EACH CHARACTER PATTERN IS 32 BYTES (See 4.3)
1B-3F-XX-YY DELETE DOWNLOAD CHARACTER LOCATION XX-YY (A200
to FFFF)
(16x16 DOT CHARACTER)
1B-40 TERMINATE SELF TEST (all configurations go to default
setting and clear all DOWN LOAD CHARACTERS)
1B-74-N SELECT CHARACTER SET (change character set will make
cursor home)
+ N=01, 16x16 DOT CHINESE CHARACTER & 8X16 DOT
US-ASCII CHARACTER
N=02, 5x8 DOT US-ASCII CHARACTER
1F 1F-40 EXECUTE SELF TEST (Use 1B-40 to terminate self test)
20-7F US-ASCII
A2B1 to A2FC CHINESE GB NUMBER CHARACTER
XX-YY 2 BYTE CHINESE GB CHARACTER XX = B0 to F7
YY = A1 to FE
+ Display automatically defaults to these conditions after power-up or reset.
< > These instructions are mutually exclusive

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4.3 Character Set Chart

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FIGURE 3 - CHINESE GB CHARACTER SET

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4.3 Character Set Chart (Cont’d)

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FIGURE 3 - CHINESE GB CHARACTER SET

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4.3 Character Set Chart (Cont’d)

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FIGURE 3 - CHINESE GB CHARACTER SET

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4.3 Character Set Chart (Cont’d)

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FIGURE 3 - CHINESE GB CHARACTER SET

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4.3 Character Set Chart (Cont’d)

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FIGURE 3 - CHINESE GB CHARACTER SET

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4.3 Character Set Chart (Cont’d)

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FIGURE 3 - CHINESE GB CHARACTER SET