Matrix Orbital LCD4041 User manual

LCD4041
User Manual
IMPORTANT: READ PAGE 2 BEFORE APPLYING POWER.

Connecting LCD4041
The LCD4041 serial interface has two types of communications: RS-232 and I2C.
Power is applied to the white or brown four pin SIP connector as follows:
Pin 1: +5Vdc
Pin 2: = SCL (I2C clock)
Pin 3: = SDA (I2C data)
Pin 4: Gnd
If the sole data source is via RS - 232, the data input is via the DB-9 connector. Pins 2 and 3 of the four pin SIP
connector are not used.
Wide Voltage Option (LCD4041-VPT)
Power is applied to the white or brown four pin SIP connector as follows:
Pin 1: +7 - 15Vdc
Pin 2: = SCL (I2C clock)
Pin 3: = SDA (I2C data)
Pin 4: Gnd
If the sole data source is via RS - 232, the data input is via the DB-9 connector. Pins 2 and 3 of the four pin SIP
connector are not used.
WARNING:
DONOT APPLYANY POWER WITH REVERSED POLARIZATION.
DONOT APPLYANY VOLTAGE OTHER THAN THE SPECIFIED VOLTAGE.
DONOT USE ANY CABLES OTHER THAN THE CABLES SUPPLIED BYMATRIX ORBITAL, UNLESSYOU ARE AWARE OF
THE MODIFICATIONS REQUIRED.
DONOT UNDER ANY CIRCUMSTANCES USE AN UNMODIFIED FLOPPYDRIVE POWER CABLE.
DB-9 Connector Pin Out
RS - 232 port: This connector is wired so that a standard “straight through” 9 pin D-sub cable may be used to connect
the modules on a standard serial port such as comm ports on PCs. Note that this device complies to the EIA232
standard in that it uses signal levels from +/- 3V to +/- 12V. It will not operate correctly at TTL (0 to +5V) levels.
Pin Number Description
2Data Out
3Data In
5Ground
9+5Vdc
Note: Signals are shown as interpreted by the Liquid Crystal Display module. 2

Pin 9
Jumper Point
Power may be provided to the module by pin 9 of the DB-9 connector instead of through the 4-pin SIP. If power is to
be applied using the DB-9, it must be a regulated +5Vdc supply. If the user intends to use pin 9 as the power source,
the user must solder the 5 volt jumper point beside the DB-9 connector. If you have any further questions or con-
cernsdon’thesitatetocontactMatrixOrbitalat[email protected].
WARNING:USE THIS METHOD OF POWER UP ATYOUR OWN RISK. APPLICATION OF AVOLTAGE TO PIN 9 GREATER THAN 5.5VOLTS
WILL CAUSE IMMEDIATE DESTRUCTION OF UNIT AND VOID THE WARRANTY.
Note: This applies to wide voltage units (V and VPT extensions) as well as standard 5 volt units.
General Purpose Output (GPO)
The GPO is meant to be used as a pair. The positive side of the GPO is connected to a power source of +5Vdc
supplied by the module at 20mA. The negative side of the GPO is able to find a path to ground through a 240 ohm
resistor. This resistor will limit the current flow through a GPO to approximately 20mA in the event of a short circuit.
If the device which is being driven by a GPO requires a relatively high current (such as a relay) and has an internal
resistance of it’s own greater than 250 ohms, then, the 240 ohm resistor may be shorted. You will find this resistor
directly below the negative pin of the general purpose output.
Note: This operation requires soldering. The GPO does not have any over current or over/under voltage protection
so care must be taken if the user decides to connect the negative side differently. For instance if the external device is
a relay it must be fully clamped to absorb any generated back electromotive force (EMF)
3

Command Set
WriteText
This section of the manual allows the user to send commands to the LCD to alter the appearance or behavior of the
display. To utilize a command, the user must send a command prefix followed by the command in the format de-
scribed in this portion of the manual. Any characters sent without a command prefix will be interpreted as text and
will be displayed on the module at the current cursor position. The current cursor position will be incremented for
each character received. Please note that unless line wrap is turned on, the text will follow the memory map of the
module.
The command set discusses in detail what the LCD's capabilities of and how to execute each command. The basic
format of all the commands
listed in this segment that do not require parameters is:
<commandprefix><command>
For commands that do require parameters however the format is as follows:
<commandprefix><command>[<parameter><parameter>.....]
Set I²C Address
ASCII '3', Hex 33, Decimal 51
Syntax0xFE0x33
To write the I²C address of the module, send a command prefix followed by the character '3', followed by a write
address. This command sets the I²C write address of the module. This value must be an even number and the read
address is one higher. For example if the I²C write address is set to 0x50, then the read address is 0x51. The change in
address is immediate. This address is 0x50 by default, and is reset temporarily back to that value when the "Manual
Over-ride" jumper is used on power up. Refer to the Appendix for more details.
Set Serial Number
ASCII '4', Hex 34, Decimal 52
Syntax 0xFE 0x34<serial number byte one><serial number byte two>
To set the serial number of the module, send a command prefix followed by the character '4', followed by two values
defining the first and second serial byte. This command sets the two byte serial number of the module. Upon the
execution of this command, the module will echo these two bytes back over the RS-232 interface. The serial number
may be set only once. Any future attempt to execute this command will result in no change and the module will return
to the originally set serial number.
ReadSerialNumber
ASCII '5', Hex 35, Decimal 53
Syntax0xFE0x35
To read the serial number, send a command prefix followed by the character ‘5’. This command will return, over the
RS-232 interface, the serial number of the module as it was previously stored.
Read Version Number
ASCII '6', Hex 36, Decimal 54
Syntax0xFE0x36
To read the version number send a command prefix followed by the character '6'. This command will return, over the
RS-232 interface, the firmware revision number of the module as it is stored.
4

Read Module Type Value
ASCII '7', Hex 37, Decimal 55
Syntax0xFE0x37
To read the module type value, send a command prefix followed by the character '7'. This command will return, over
the RS-232 interface, the model type value of the module. Values for various modules at the time of this publication
are as follows:
Set RS - 232 Port Speed
ASCII '9', Hex 39, Decimal 57
Syntax0xFE0x39<speed>
To set the RS-232 port speed, send a command prefix followed by the character '9', followed by a value defining the
desired<speed>. This command sets the LCD's RS-232 port to the specified<speed>. The change takes place
immediately. <speed> is a single byte specifying the desired port <speed> Valid speeds are shown in the table
below. The LCD can be manually reset to 19,200 baud in the event of an error during transmission (including trans-
mitting a value not listed below). Refer to the appendix for details.
Load New Start Up Screen
ASCII‘@’, Hex 40, Decimal 64
Syntax 0xFE 0x40<160 characters>
This command allows you to load a new start up screen. To execute this you must send a command prefix followed by
the character '@', followed by 160 characters to format the screen to your specifications. The characters on the
module should be formatted as shown in the diagram.
Set Contrast
ASCII 'P', Hex 50, Decimal 80
Syntax0xFE0x39<contrast>
To set the contrast of the display, send a command prefix followed by the character 'P', followed by a hex value
defining the contrast. This command sets the display's contrast to <contrast>, where <contrast> is a value between
0x00 and 0xFF (between 0 and 255). Lower values cause “on” elements in the display area to appear lighter, while
higher values cause “on” elements to appear darker. Lighting conditions will affect the actual value used for optimal
viewing. Individual LCD modules will also differ slightly from each other in appearance. In addition, values for
optimal viewing while the LCD backlight is on may differ from values used when backlight is off.
LCD0821 –0x01 LCD2021 –0x03 LCD1641 –0x04
LCD2041 –0x05 LCD4021 –0x06 LCD4041 –0x07
LK202-25 –0x08 LK204-25 –0x09 LK404-55 –0x0A
VFD2021 –0x0B VFD2041 –0x0C VFD4021 –0x0D
VK202-25 –0x0E VK204-25 –0x0F GLC12232 –0x10
GLC12864 –0x11 GLC128128 –0x12 GLC24064 –0x13
GLK12864-25 –0x14 GLK24064-25 –0x15 GLK128128-25 –0x21
GLK12232-25 –0x22 LK404-AT –0x31 VFD1621 –0x32
LK402-12 –0x33 LK162-12 –0x34 LK204-25PC -0x35
Hex Value Speed
FF Hex 1200 baud
81 Hex 2400 baud
20 Hex 9600 baud
0F Hex 19200 baud
Character 1
----------------------------------------------
Character 40
Character 41
----------------------------------------------
Character 80
Character 81
----------------------------------------------
Character 120
Character 121
----------------------------------------------
Character 160
5

Set Contrast and Save Value
Hex 91, Decimal 145
Syntax0xFE0x91
This command works in exactly the same way as the “Set Contrast” command. The only difference is it saves the
contrast value in the memory of the module, whereas, the previous command only changes the value for the duration
of use.
Auto Line Wrap On
ASCII 'C', Hex 43, Decimal 67
Syntax0xFE0x43
This command enables the automatic line wrap function. Transmitted characters which overrun the width of the
display will automatically wrap to the next line. The bottom line wraps to line 1 of the display. To carry out this
command the user must send a command prefix followed the character 'C'.
Auto Line Wrap Off
ASCII 'D', Hex 44, Decimal 68
Syntax0xFE0x44
This command disables the automatic line wrapping function. To turn off the auto line wrapping, send a command
prefix followed by the character 'D'.
Auto Scroll On
ASCII 'Q', Hex 51, Decimal 81
Syntax0xFE0x51
To turn the automatic line scrolling on, send a command prefix followed by the character 'Q'. In combination with the
“Auto Line Wrap” command the text will automatically wrap and scroll up.
Note: “Auto Line Wrap” must be enabled for “Auto Scroll” to work properly.
Auto Scroll Off
ASCII 'R', Hex 52, Decimal 82
Syntax0xFE0x82
To turn the automatic line scrolling off, send a command prefix followed by the character 'R'.
Backlight On
ASCII 'B', Hex 42, Decimal 66
Syntax0xFE0x42<number of minutes>
To turn the backlight on, send a command prefix followed by the character 'B' as well as the number of minutes for the
backlight to be activated. If <minutes> is sent as zero then the backlight will remain on indefinitely. The maximum
value for <minutes> is 100. Example:
<commandprefix> 0xFE
<command> 0x42
<minutes> 0 to 100
Backlight Off
ASCII 'F', Hex 46, Decimal 70
Syntax0xFE0x46
To turn the backlight off, send a command prefix followed by the character 'F'.
6

ClearDisplay
ASCII 'X', Hex 58, Decimal 88
Syntax0xFE0x58
This command clears any text and graphics off the display. To clear the display, send a command prefix followed the
character 'X'.
Cursor On
ASCII 'J', Hex 4A, Decimal 74
Syntax0xFE0x4A
To turn the cursor on at the current position, send a command prefix followed by the character 'J'. Note cursor is on by
default at power up.
Cursor Off
ASCII 'K', Hex 4B, Decimal 75
Syntax0xFE0x4B
To turn the cursor off at the current position , send a command prefix followed by the character 'K'.
Cursor Left
ASCII 'L', Hex 4C, Decimal 76
Syntax0xFE0x4C
To move the cursor one space to the left of current position, send a command prefix followed by the character 'L'.
Cursor Right
ASCII 'M', Hex 4D, Decimal 77
Syntax0xFE0x4D
To move the cursor one space to the right of the current position, send a command prefix followed by the character
'M'.
Cursor Blink On
ASCII 'S', Hex 53, Decimal 83
Syntax0xFE0x53
To turn on the blinking cursor at the current position, send a command prefix followed by the character 'S'. Please
note that the blinking cursor is on by default at power up.
Cursor Blink Off
ASCII 'T', Hex 54, Decimal 84
Syntax 0xFE 0x54
To turn off the blinking cursor at the current position send a command prefix followed by the character 'T'.
Create Custom Character
ASCII 'N', Hex 4E, Decimal 78
Syntax 0xFE 0x4E<character between 0x00 and 0x07><8 bytes>
This command creates a custom character. For the LCD4041 the user can have up to eight custom characters. To
execute this command, send a command prefix followed by the character 'N'. The display will now await the number
which identifies the custom character. This number must be between 0x00 and 0x07. When the module determines
what character it's working on, then the user must send 8 bytes. This defines the display character. See the diagram
below for and explanation of the display character structure.
7

MSB LSB
* * * 12345Data Byte 1
* * * 678910 Data Byte 2
* * * 11 12 13 14 15 Data Byte 3
* * * 16 17 18 19 20 Data Byte 4
* * * 21 22 23 24 25 Data Byte 5
* * * 26 27 28 29 30 Data Byte 6
* * * 31 32 33 34 35 Data Byte 7
* * * 36 37 38 39 40 Data Byte 8
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
Cursor Line
Pixel Layout of Display Characters
General Purpose Output On
ASCII 'W', Hex 57, Decimal 87
Syntax0xFE0x57
To turn the general output purpose on, send a command prefix followed by the character ‘V’.
Note: The output is a current sink (Max 20mA)
General Purpose Output Off
ASCII 'V', Hex 56, Decimal 86
Syntax0xFE0x56
To turn the general output purpose off, send a command prefix followed by the character 'W'.
Go To Position
ASCII 'G', Hex 47, Decimal 71
Syntax 0xFE 0x47<column number><row number>
Set the current position. Send a command prefix followed by the character 'G' and two numbers defining in order, the
column to move to and the row to move to. The format for column 20 and row 3 would be:
<commandprefix> 0xFE
<command> 0x47
<column number> 0x14
<row number> 0x03
Go To Top Left
ASCII 'H', Hex 48, Decimal 72
Syntax0xFE0x48
To reset the current position to top left, send a command prefix followed by the character 'H'. In the following
example the format is displayed for this command. 8
DiagramA

Initialize Large Digits
ASCII 'n', Hex 6E, Decimal 110
Syntax0xFE0x6E
Before any large digits may be created, this command must be executed. It only needs to be sent once to initialize the
custom characters for large digits. Due to the fact large digits use pre-determined custom characters, no user custom
characters may be displayed or created while digits are in use.
Place Large Digit
ASCII '#', Hex 23, Decimal 35
Syntax0xFE0x35<column number><digit number>
This command allows the creation of large digits on the LCD screen. To execute this command the user must send a
command prefix followed by the character '#' and the column number where the digit is to be placed. Then the user
must enter the number of the large digit which is required in hexadecimal. Numbers of almost full display height may
be placed along side regular text on four row displays. The column number has a maximum value which is less than the
display width because the digits are all three columns wide. The module must be initialized for large digit creation
before large digits may be placed. If regular text and large digits are mixed on one screen, the user should always set
the display cursor position before placing regular text because the creation of a large digit will leave the cursor
position to the bottom right of the large digit and not at the last regular text write position. The format for this
command is as follows:
<commandprefix> 0xFE
<command> 0x23
<column number> 0x01 to 0x26 (1 to 38 for a 40 column display)
<digitnumber> 0x00 to 0x09 (numbers 0 to 9)
Initialize Horizontal Bar Graph
ASCII 'h', Hex 68, Decimal 104
Syntax0xFE0x68
Before any horizontal bar graphs may be created, this command must be executed. It only needs to be sent once to
initialize the custom characters for bar graph creation. Due to the fact bar graphs use custom characters, no user
custom characters may be displayed or created while bar graphs are in use.
MakeHorizontal Bar Graph
ASCII '|', Hex 7C, Decimal 124
Syntax0xFE0x7C<columnnumber><rownumber><direction><barlength>
This command places a horizontal bar graph at the specified column and row with the specified width. The format of
the command is as follows:
<command prefix > 0xFE
<command> 0x7C
<column number> 0x01 to 0x28 for a forty column display
<row number> 0x01 to 0x04 for a four line display
<direction> 0 for left to right, 1 for right to left
<bar length> 0x00 to 0xC8 (0 to 200) for a forty column display
Bar length is in pixel widths. On a forty column display the maximum bar graph width is two hundred pixels (if the bar
graph starts at the edge). This is due to the fact that each of the forty columns on the display are five pixels wide. The
width of the space between columns is not taken into account.
9

Initialize Thick Vertical Bar Graph
ASCII 'v', Hex 76, Decimal 118
Syntax0xFE0x76
Before any thick vertical bar graphs may be created, this command must be executed. It only needs to be sent once to
initialize the custom characters required for bar graph creation. Due to the fact bar graphs use custom characters, no
user custom characters may be displayed or created while bar graphs are in use.
Initialize Thin Bar Vertical Graph
ASCII 's', Hex 73, Decimal 115
Syntax0xFE0x73
Before any thin vertical bar graphs may be created, this command must be executed. It only needs to be sent once to
initialize the custom characters required for bar graph creation. Due to the fact bar graphs user custom characters, no
user custom characters may be displayed or created while bar graphs are in use.
MakeVertical Bar Graph
ASCII '=', Hex 3D, Decimal 61
Syntax 0xFE 0x3D<column number><bar length>
This command places a bar graph at the specified column with the specified height. The style of the vertical bar graph
whether it be thick or thin is selected by the initialize vertical bar graph command. If thick bar graphs are preferred,
the 'v' command should be sent to initialize the bar graph. If a thin vertical bar graph is desired, the 's' command
should be sent to initialize the bar graph. The format for the command is as follows:
<commandprefix> 0xFE
<command> 0x3D
<column number> 0x01 to 0x28 for a forty column display
<bar length> 0x00 to 0x20 (1 to 32) for a four line display.
Bar height is in pixel widths. On a four line display the maximum bar graph height is thirty-two, this is because each of
the lines in the display are eight pixels high. The width of the space between the lines is not taken into account.
Note: Vertical bar graphs may not be used with horizontal bar graphs, and thick bar graphs may not be used with
thin bar graphs. This is because all these functions make use of the same “custom character” spaces. As a result,
custom characters are also unavailable while any of these functions are in use.
10

LCD Character Font Chart
11

Specification Sheets
EnvironmentalSpecifications
ElectricalSpecification
OpticalSpecifications
Standard Temp. Extended Temp.
Operating Temperature 0º to +50º C -20º to +70º C
Storage Temperature -20º to +70º C -40º to +85º C
Operating Relative Humidity 90% max non-condensing
Supply Voltage 4.75 -5.25 Vdc (optional 7 -15Vdc)
Supply Current 25mA typical
Backlight Supply Current 150mA typical
Number of characters 160 (40 Characters x 4 Lines)
Matrix format 5 x 7 with underline
Display area 140.45 x 23.16mm (XxY)
Character size 2.78 x 4.89mm (XxY), not including underline
Character pitch 3.53mm
Line pitch 6.09mm
Dot size 0.50 x 0.55mm (XxY)
Dot pitch 0.57 x 0.62mm (XxY)
LED Backlight life 100,000 hours typical
Color of illumination Yellow green
12

LCD4041
13

Appendix
Hexadecimal
Hex numbers are specified in C language convention as 0xUL - where U is the upper nibble and L is the lower nibble.
Eg: 0xFE is 1111 1110 in binary. This is equivalent to ULH or ULh as in the binary number
1111 1110
upper lower
nibble nibble
.....whichwouldbeFEHorFEh
ManualOver-ride
Manual override should only be required in one instance. If for some reason the module is set at a baud rate which
cannot be produced by the host system and all communication to the display is lost, then the user should follow this
simple procedure:
1) Turn off the display
2) Place a jumper on the two pin strip header indicated on the diagram as the Manual Over-ride Jumper.
3) Power up the display.
4) Remove the jumper and change the RS-232 port settings to a baud rate recognized by the host
system using the “Set RS-232 Port Speed” command.
5) Turn off the display.
6) Power up the display.
Refer to the “Set RS-232 Port Speed” command for acceptable baud rates.
14

EUROPE
AUSTRIA
MEGATONGes.m.b.H.
Franz-Schubert-Gasse 12, A-2372 GIESSHÜBL
Telephone : [phone]
Facsimile : [phone]
Email:[email protected]
FINLAND
SymmetricOy
Maria Jotunin Tie 11
Helinski,Finland00400
Telephone: + 358 9 5885 322
Facsimile: + 358 9 5885 578
Email: [email protected]
WWW: http://www.symmetric.fi/
GERMANY
Elektronikladen Mikrocomputer Gmbh
Offices throughout Germany
Telephone : [phone]
Facsimile : [phone]
Email:[email protected]
WWW:http://www.elektronikladen.de/
THE NETHERLANDS
AntratekElectronics
Kanaalweg 33,
NL-2903LR Capelle aan den Ijssel, The Netherlands
Telephone :[phone]
Facsimile : [phone]
Email:[email protected]
WWW:http://www.antratek.nl
ITALY
QuadriviumNET
ViaCirconvalazione Sud, 76
33033Codriopo,Udine,Italy
Telephone : [phone]
Facsimile : [phone]
Email:[email protected]
WWW:http://www.qnet.it/
15
NORTHAMERICA
CANADA
HVW Technologies
Suite 473, 300 - 8120 Beddington Blvd. N.W.
Calgary, Alberta T3K 2A8 Canada
Telephone: [phone]
Facsimile: [phone]
Email:[email protected]
WWW:http://www.hvwtech.com/
Tri-M Systems Inc.
6-1301 Ketch Court
Coquitlam, BC V3K 6X7 Canada
Toll Free Telephone: [phone]
Alternate Telephone: [phone]
Facsimile: [phone]
Email: [email protected]
WWW: http://www.tri-m.com/
UNITED STATES
EMJ Embedded Systems
Suite 100-1434 Farrington Road
Apex, North Carolina 27502 USA
Toll Free Telephone: [phone]
Facsimile: [phone]
Email:[email protected]
WWW:http://www.emjembedded.com/
Jameco Electronic Components
1355 Shoreway Road
Belmont, California 94002-4100 US
Toll Free Telephone: [phone]
Toll Free Facsimile: 1 800 237 6948
Email:[email protected]
WWW:http://www.jameco.com/
Note: Currently only carries LCD2041, LK204-25
Linux Central
Suite T2 37060 Garfield
ClintonTownship, Michigan 48036 USA
Telephone: [phone]
Toll Free Telephone: 1 877 LINUX CD (546 8923)
Facsimile: [phone]
Email:[email protected]
WWW:http://linuxcentral.com/

SCANDINAVIA
Lawicel
Klubbgatan 3
SE-282 32 Tyringe, Sweden
Telephone: [phone]
Facsimile: [phone]
Email: [email protected]
WWW: http://www.lawicel.com
LillaFabriken
Box 1003
SE-172 21 Sundbyberg, Sweden
Telephone: [phone]
Facsimile: [phone]
Email: [email protected]
WWW:http://www.lillfab.se
SWITZERLAND
BernhardElektronik
Aarauer Str. 20,
CH-5734 Reinach AG
Telephone : [phone]
Facsimile : [phone]
Email:[email protected]
MIDDLE EAST
ISRAEL
Alpha Terminals & Printers Ltd.
7 Ha'Mifalm St.
Petach - Tikva, Israel 49250
Telephone: [phone]
Facsimile: [phone]
Email: [email protected]
AUSTRALIA
AUSTRALIA
Alfa-Tek
Unit 7, 42 - 50 Stud Road
Bayswater,Victoria, Australia, 3111
Telephone: + 61 39 720 5344
Facsimile: + 61 39 720 5268
Email:[email protected]
WWW:http://www.alfatek.com.au/
ASIA
INDIA
ALSystems
105, 3rd Street,
Tatabad, Coimbatore - 641012
TamilNadu,India
Telephone: [phone], 493960
Facsimile: [phone], 213849
Email:[email protected]
WWW: http://business.vsnl.com/al_systems
AFRICA
EGYPT
AmGroup 13
SheratonHeliopolis
Zone 8, Cairo EGYPT
Email:[email protected]
16

Contact Information
To request information or purchase any of Matrix Orbital Corporation's products contact one of our Authorized
Distributors. For technical questions and support please contact us.
Sales/Accounts Chantelle Jenkins
[email protected]
Technical Support Aman Sidhu
[email protected]
Lead Project Engineer Rob Hansen
[email protected]
Tel: [phone] Fax: [phone]
Or visit us at our website: http://www.matrix-orbital.com
Matrix Orbital 2000. The information contained here in is subject to change without notice. Matrix Orbital Corporation assumes no responsibility for the use of circuitry embodied
in a Matrix Orbital product. Matrix Orbital does not authorize it’s products for use as critical components in life-support systems where a malfunction or failure may reasonably be
expected to result in significant injury to the user. The inclusion of Matrix Orbital products in life support system applications implies that the manufacturer assumes all risk of such
use and in doing so indemnifies Marix Orbital of any charges.