IEE SL330-X4X0 Manual de usuario
APPLICATION REVISIONS
NEXT ASSY FINAL ASSY LTR DESCRIPTION DATE APPROVED
- PRODUCTION RELEASE/E.O. 32324 11-12-96 D. Goodale
AE.O. 33085 9-19-97 D. Goodale
BE.O. 33754 5-27-98 D. Goodale
LIQUID CRYSTAL DISPLAY
4 X 40 CHARACTER
5x8 DOT MATRIX
SL330-X4X0
REV B----B--------------A
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
LIQUID CRYSTAL DISPLAY
DRAWN R. January 02/06/96 4 X 40 CHARACTER
CHECK C. Rudolph 11/12/96 5x8 DOT MATRIX
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 11-12-96 A05464 SL330-X4X0
WRITTEN PERMISSION OF I.E.E. INC. APPROVED SCALE SHEET 1OF 21
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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 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 4 line Liquid Crystal Display (LCD) ,
40 characters wide. The characters are formed using a 5x8 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 4 User defined characters
Power and data on same connector ASCII + 7 additional character sets
11-29 Volt Operation EIA-232C data interface
Low cost EIA-422A data interface
Shielded I/O Connector standard Software selectable blink
Wide operating temperatures (-20 to +70°)Software self test
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 EIA-232C/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.
Figures 3 through 10 depict 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 240 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 5 x 8 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 A0 (HEX))
02 DISPLAY SOFTWARE CHECKSUM AND SOFTWARE NUMBER
03 READ CURSOR LOCATION VALUE (DISPLAY RESPONDS WITH 1 BYTE)
FOR 5 x 8 DOT CHARACTERS FOR 10 x 14 DOT CHARACTERS
01-28 (HEX) FOR LINE 1 01-14 (HEX) FOR LINE 1
41-68 (HEX) FOR LINE 2 21-34 (HEX) FOR LINE 2
81-A8 (HEX) FOR LINE 3
C1-E8 (HEX) FOR LINE 4
04 READ DATA AT PRESENT CURSOR LOCATION
05 05-C-L-D GRAPH MODE: DISPLAY 8 PIXEL DATA D ON LINE L COLUMN C
C = 01-1E (HEX) (30 columns, each 8 pixels wide = 240 pixels)
L = 01-24 (HEX) (36 pixel lines)
D = 8 PIXEL DATA
example: 05-01-01-A3: turn on 1st, 3rd, 7th and 8th pixel from upper left corner
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)
0A LINE FEED (vertical scroll from bottom line; cursor position does not change)
0C CLEAR THE DISPLAY (cursor stays)
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
<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)
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4.2.1 Instruction (Cont’d)
DATA (HEX) DESCRIPTION
<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)
19 SET BIT 7 HIGH FOR NEXT BYTE ONLY:
19-00 TO 19-7F: Same as ASCII 80-FF
<1A> WRAP AROUND DATA ENTRY:
(After bottom right character enters, cursor moves to home position)
1B 1B-05-49 IEE SPECIFIC RESPONSE CODE
(Sent without regard for flow control)
D,2,IEE,36039,-01 (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
EACH CHARACTER PATTERN IS 5 BYTES (See 4.4)
1B-3F-N DELETE DOWNLOAD CHARACTER LOCATION N (N=20-FF)
(5x8 DOT CHARACTER ONLY)
1B-40 TERMINATE SELF TEST (all configurations go to default setting
and clear all DOWN LOAD CHARACTERS)
1B-74-N SELECT CHARACTER SET
+ N=01, ASCII AND GENERAL EUROPEAN (fig. 3 & 4)
N=02, ASCII AND KATAKANA (fig. 6)
N=03, ASCII AND CYRILLIC (fig. 5)
N=04, ASCII AND HEBREW (fig. 7)
N=05, ASCII AND GREEK (fig. 8)
N=06, ASCII AND POLISH (fig. 9)
N=07, BOLD FONT (fig. 10)
1D-05 EPSON SPECIFIC RESPONSE CODE DISPLAY RESPONDS
SENDING 05 TO HOST.
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4.2.1 Instruction (Cont’d)
DATA (HEX) DESCRIPTION
1F 1F-24-C-L MOVE CURSOR TO COLUMN C LINE L
FOR 5x8 DOT CHARACTERS: C=01-28 (HEX)
L=01-04 (HEX)
FOR 10x14 DOT CHARACTER: C=01-14 (HEX)
L=01-02 (HEX)
1F-40 EXECUTE SELF TEST (Use 1B-40 to terminate self test)
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
* These instructions are only for 10x14 DOT CHARACTER SET.
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4.3 Character Set Charts
4.3.1 5x8 Dot Matrix Characters
The L330-X4X0 module offers six independently-selectable Character sets. Each consists of the ASCII set
shown below in Fig 3 occupying hex 20 through hex 7F, plus either General European (fig 4), Cyrillic (fig 5),
Katakana (fig 6), Hebrew (fig 7), Greek (fig. 8), or Polish (fig. 9). These “special” portions of the character field
occupy all or portions of hex 80 through hex F2 as shown.
FIGURE 3 - ASCII CHARACTER SET
Note: N/A = Non-Applicable
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4.3.1 5x8 Dot Matrix Characters (Continued)
FIGURE 4 - GENERAL EUROPEAN CHARACTER SET
(Default Setting)
Note: N/A = Non-Applicable
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