LCD0821

LCD0821 Technical Manual Revision: 2.1 Contents Contents 1 ii Getting Started 1.1 Display Options Available 1.2 Accessories . . . . . . . . 1.3 Features . . . . . . . . . . 1.4 Connecting to a PC . . . . 1.5 Installing the Software . . 1.5.1 uProject . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1 2 3 4 5 5 Hardware Information 2.1 Power/Data Connector . 2.2 RS-232 Header . . . . . 2.3 Manual Override . . . . 2.4 General Purpose Output . 2.5 Protocol Select Jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 6 7 7 8 9 3 Troubleshooting 3.1 The display does not turn on when power is applied. . . . . . . . . . . . . . . . . . . . . . . 3.2 The display module is not communicating. . . . . . . . . . . . . . . . . . . . . . . . . . . . 3.3 The display module is communicating, however text cannot be displayed. . . . . . . . . . . 10 10 10 11 4 Communications 4.1 Introduction . . . . . . . . . . . . . . 4.1.1 I2 C Communication Summary 4.1.2 I2 C Transaction Example . . . 4.1.3 Serial Communication . . . . 4.2 Changing the I2 C Slave Address . . . 4.3 Changing the Baud Rate . . . . . . . 4.4 Setting a Non-Standard Baud Rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 11 11 12 13 13 13 14 Text 5.1 Introduction . . . . . . . . . 5.1.1 Character Set . . . . 5.1.2 Control Characters . 5.2 Auto Scroll On . . . . . . . 5.3 Auto Scroll Off . . . . . . . 5.4 Clear Screen . . . . . . . . . 5.5 Changing the Startup Screen 5.6 Set Auto Line Wrap On . . . 5.7 Set Auto Line Wrap Off . . . 5.8 Set Cursor Position . . . . . 5.9 Go Home . . . . . . . . . . 5.10 Move Cursor Back . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 15 16 17 18 18 18 18 19 19 19 20 20 2 5 Matrix Orbital . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . LCD0821 ii 5.11 5.12 5.13 5.14 5.15 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 21 21 21 21 Special Characters 6.1 Introduction . . . . . . . . . . . . . . . 6.2 Creating a Custom Character . . . . . . 6.3 Saving Custom Characters . . . . . . . 6.4 Loading Custom Characters . . . . . . 6.5 Save Startup Screen Custom Characters 6.6 Initialize Medium Number . . . . . . . 6.7 Place Medium Numbers . . . . . . . . 6.8 Initialize Horizontal Bar . . . . . . . . 6.9 Place Horizontal Bar Graph . . . . . . . 6.10 Initialize Narrow Vertical Bar . . . . . . 6.11 Initialize Wide Vertical Bar . . . . . . . 6.12 Place Vertical Bar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 22 22 23 24 24 25 25 26 26 26 27 27 General Purpose Output 7.1 Introduction . . . . . . . . . 7.2 General Purpose Output Off 7.3 General Purpose Output On . 7.4 Set Startup GPO state . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 28 28 28 29 Display Functions 8.1 Introduction . . . . . . . 8.2 Display On . . . . . . . 8.3 Display Off . . . . . . . 8.4 Set Brightness . . . . . . 8.5 Set and Save Brightness . 8.6 Set Contrast . . . . . . . 8.7 Set and Save Contrast . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 29 29 30 30 30 31 31 Data Security 9.1 Introduction . . . . . . 9.2 Set Remember . . . . . 9.3 Data Lock . . . . . . . 9.4 Set and Save Data Lock 9.5 Write Customer Data . 9.6 Read Customer Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 32 32 33 34 35 35 10 Miscellaneous 10.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.2 Read Version Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.3 Read Module Type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 35 35 36 Matrix Orbital iii 6 7 8 9 Move Cursor Forward . . . Underline Cursor On . . . Underline Cursor Off . . . Blinking Block Cursor On Blinking Block Cursor Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . LCD0821 11 Command Summary 11.1 Communications . . . . 11.2 Text . . . . . . . . . . . 11.3 Special Characters . . . 11.4 General Purpose Output . 11.5 Display Functions . . . . 11.6 Data Security . . . . . . 11.7 Miscellaneous . . . . . . 11.8 Command By Number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 38 38 39 40 40 41 41 41 12 Appendix 12.1 Specifications . . . . . . . 12.1.1 Environmental . . 12.1.2 Electrical . . . . . 12.1.3 Optical . . . . . . 12.2 Physical Layout . . . . . . 12.3 Ordering Information . . . 12.4 Definitions . . . . . . . . . 12.5 Contacting Matrix Orbital . 12.6 Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 43 43 43 43 44 46 46 47 47 Matrix Orbital LCD0821 iv 1 Getting Started Figure 1: LCD0821 The LCD0821 is an intelligent LCD display designed to decrease development time by providing an instant solution to any project. With the ability to communicate via serial RS-232/TTL and I2 C protocols, the versatile LCD0821 can be used with virtually any controller. The ease of use is further enhanced by an intuitive command structure to allow display settings such as backlight brightness, contrast and baud rate to be software controlled. Additionally, up to forty custom characters such as character sets for bar graphs, medium and large numbers may be stored in the non-volatile memory to be easily recalled and displayed at any time. 1.1 Display Options Available The LCD0821 comes in a wide variety of colors including the standard yellow/green or inverse yellow, the popular blue/white and the crisp white/grey as well as inverse red which is excellent for viewing at night. Extended voltage, and temperature options are also available, to allow you to select the display which will best fit your project needs. Matrix Orbital LCD0821 1 Figure 2: LCD0821 Options 1.2 Accessories NOTE Matrix Orbital provides all the interface accessories needed to get your display up and running. You will find these accessories and others on our e-commerce website at http://www.matrixorbital.com. To contact a sales associate see Section 12.5 on page 47 for contact information. Figure 3: 5V Power Cable Adapter Matrix Orbital Figure 4: 12V Power Cable Adapter (V/VPT Models) LCD0821 2 Figure 6: Serial Cable 4FT Figure 5: Breadboard Cable Figure 7: Communication and 5V Power Cable 1.3 • • • • • • • • • • • Features 8 column by 2 line alphanumeric liquid crystal display Selectable communication protocol, serial at RS-232 or TTL levels or I2 C One, 5V -20mA, general purpose output for a variety of applications Lightning fast communication speeds, up to 57.6 kbps for RS-232 and 100 kbps for I2 C Extended temperature available for extreme environments of -20C to 70C Extended voltage power supply available Built in font with provision for up to 8 user defined characters Up to 127 modules addressable on the same 2 wire I2 C interface Ability to add a customized splash / startup screen Software controlled contrast and brightness with configurable time-out setting up to 90 minutes Horizontal or vertical bar graphs Matrix Orbital LCD0821 3 1.4 Connecting to a PC The LCD0821 connects seamlessly to a PC and it is an excellent means of testing the functionality. To connect your display to a PC, you will require a standard RS-232 9-pin serial cable such as the one pictured in figure 6 on the previous page, as well as a modified 5V power adapter such as the one pictured in figure 3 on page 2. In order to connect your display to a personal computer follow these easy instructions: 1. Plug the serial cable into the com port you wish to use. 2. Connect the modified 5V power adapter to a power lead from your PC power supply (you will have to open your computer case). 3. Connect the serial cable to the DB-9 connector on the back of the display. 4. Connect the 5V power adapter to the 4-pin connector on the back of the display. WARNING DO NOT use the standard floppy drive power connector, as this will not provide you with the correct voltage and will damage the display module. Figure 8: PC vs Matrix Orbital Display Module Wiring Matrix Orbital LCD0821 4 1.5 Installing the Software 1.5.1 uProject uProject was designed by Matrix Orbital to provide a simple and easy to use interface that will allow you to test all of the features of our alpha numeric displays. To install uProject from the Matrix Orbital CD, follow the following steps: 1. 2. 3. 4. Insert the Matrix Orbital CD-ROM into the CD drive Locate the file, uProject.exe, which should be in the “CD-drive:\Download” directory. Copy uProject.exe to a directory that you wish to run it from. Double click on "uProject.exe" Be sure to check the information selected in the COM Setup the first time uProject is run. Once this information is entered correctly the program can be used to control all functions of the graphic display. Comport The serial port the display is plugged in to. Baudrate The communication speed the display module is set to. (Default 19,200) Figure 9: uProject Settings NOTES • uProject and other alphanumeric software may also be downloaded from Matrix Orbital’s support site at http://www.matrixorbital.ca/software/software_alpha/ Matrix Orbital LCD0821 5 2 Hardware Information Refer to the following diagram for this chapter: 1 GPO 2 Power / Data Connector 3 Manual Override 4 RS-232 Header 5 Protocol Select Jumpers Figure 10: LCD0821 2.1 Power/Data Connector The Power/Data Connector provides a standard connector for powering the display module. The LCD0821 requires five volts for the standard display module and between nine and fifteen for the wide voltage (V) model. The voltage is applied through pins one and four of the four pin Power/Data connector. Pins two and three are reserved for serial transmission, using either the RS-232/TTL or the I2 C protocol, depending on what has been selected by the Protocol Select Jumpers. Pins two and three may be reversed by changing the Legacy Connector Jumpers in order to be compatible with previous PCB revisions. Pin 1 PWR (See table 1 on the next page) Pin 2 Pin 3 Pin 4 Rx \ SCL (I2 C clock) Tx \ SDA (I2 C data) GND Figure 11: Power Connector and Pin out Matrix Orbital LCD0821 6 Table 1: Power Requirements Standard -V Supply Voltage +5Vdc ±0.25V +9V to +15V Backlight On Supply 105 mA typical Backlight Off Supply 30 mA WARNINGS • Do not apply any power with reversed polarization. • Do not apply any voltage other than the specified voltage. 2.2 RS-232 Header The RS-232 Header provides an alternate serial transmission connector. Pin 1 Pin 2 Pin 3 GND Rx PWR (See table 1) Figure 12: Power Connector and Pin out NOTE This header is for RS-232 transmission only. 2.3 Manual Override The Manual Override is provided to allow the LCD0821 to be reset to factory defaults. This can be particularly helpful if the display module has been set to an unknown baud rate or I2 C Slave Address and you are no longer able to communicate with it. If you wish to return the module to its default settings you must: 1. 2. 3. 4. 5. Power off the display module. Place a Jumper on the Manual Override pins. Power up the display module. The display module is now set to its default values listed below in table 2. Edit and save settings. Matrix Orbital LCD0821 7 Figure 13: Manual Override Jumper Table 2: Default Values Brightness 255 Baud Rate 19.2 kbps I2 C Slave Address 0x50 Data Lock False RS232AutoTransmitData True NOTE The display module will revert back to the old settings once turned off, unless the settings are saved. 2.4 General Purpose Output A unique feature of the LCD0821 is the ability to control relays and other external devices using a General Purpose Output, which can provide up to 20 mA of current and +5Vdc from the positive side of the GPO. This is limited by a 240 ohm resistor as pictured below in figure 14. 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 its own greater than 250 ohms, then the 240 ohm resistor may be removed and replaced with a Jumper. Matrix Orbital LCD0821 8 + GND MAX: 20 mA, +5Vdc Figure 14: General Purpose Output WARNING If connecting a relay, be sure that it is fully clamped using a diode and capacitor in order to absorb any electro-motive force (EMF) which will be generated. 2.5 Protocol Select Jumpers The Protocol Select Jumpers, pictured below in figure 15, provide the means necessary to toggle the display module between RS-232, TTL, and I2 C protocols. As a default, the jumpers are set to RS-232 mode with solder jumps on the 232 jumpers. In order to place the display module in I2 C mode you must first remove the solder jumps from the 232 jumpers and then place them on the I2C jumpers. The display will now be in I2 C mode and have a default slave address of 0x50 unless it has been changed. Similarly, in order to change the display to TTL mode, simply remove the zero ohm resistors from the 232 or I2 C jumpers and solder them to the TTL jumpers. Matrix Orbital LCD0821 9 Figure 15: Protocol Select Jumpers 3 Troubleshooting 3.1 The display does not turn on when power is applied. • First, you will want to make sure that you are using the correct power connector. Standard floppy drive power cables from your PC power supply may fit on the Power/Data Connector however they do not have the correct pin out as can be seen in figure 8 on page 4. Matrix Orbital supplies power cable adapters for connecting to a PC, which can be found in the Accessories Section on page 2. • The next step is to check the power cable which you are using for continuity. If you don’t have an ohm meter, try using a different power cable, if this does not help try using a different power supply. • The last step will be to check the Power / Data Connector on the LCD0821. If the Power / Data Connector has become loose, or you are unable to resolve the issue, please contact Matrix Orbital, see 12.5 on page 47 for contact information. 3.2 The display module is not communicating. • First, check the communication cable for continuity. If you don’t have an ohm meter, try using a different communication cable. If you are using a PC try using a different Com Port. • Second, please ensure that the display module is set to communicate on the protocol that you are using, by checking the Protocol Select Jumpers. To change the protocol used by the display module see Section 2.5 on the preceding page. • Third, ensure that the host system and display module are both communicating on the same baud rate. The default baud rate for the display module is 19200 bps. Matrix Orbital LCD0821 10 • If you are communicating to the display via I2 C please ensure that the data is being sent to the correct address. The default slave address for the display module is 0x50. NOTE I2 C communication will always require pull up resistors. • Finally, you may reset the display to it’s default settings using the Manual Override Jumper, see Section 2.3 on page 7. 3.3 The display module is communicating, however text cannot be displayed. • A common cause may be that the contrast settings have been set to low. The solution to this problem is to adjust the contrast settings. The default setting that will work in most environments is 128. NOTE Optimal contrast settings may vary according to factors such as temperature, viewing angle and lighting conditions. If you are unable to resolve any issue please contact Matrix Orbital. See 12.5 on page 47 for contact information. 4 Communications 4.1 Introduction The commands listed in this chapter describe how to configure data flow on the LCD0821. 4.1.1 I2 C Communication Summary The LCD0821 is capable of communicating at 100 KHz in I2 C mode, with 127 units addressable on a single I2 C communication line. However, in order to communicate via I2 C you must first ensure that pull up resistors, with a nominal value of 1K to 10K, are placed on the SCL and SDA communication lines coming from pins two and three of the Data / Power Connector respectively. Data responses by the module are automatically output via RS232, in case the host will be querying the module, it is necessary for the host to inform the module that its responses are to be output via I2 C. This can be done by sending command 254 /160 / 0 to turn off auto transmission of data in RS232. This will keep the data in the buffer until the master clocks a read of the slave. The I2 C data lines operate at 5V normally or 3.3V for -1U style units. The LCD0821 uses 8-bit addressing, with the 8th or Least Significant Bit (LSB) bit designated as the read/write bit, a 0 designates a write address and a 1 designates a read address. The default read address of the display module will be 0x51, whereas the write address is 0x50 by default. This address may be changed by using cmd 254 / 51 / . The LCD0821 should only be sent addresses that are even (LSB is 0). When the I2 C master wishes to write to the display, the effective address is $50 (0101 0000) , since the LSB has to be Matrix Orbital LCD0821 11 0 for an I2 C master write. When the I2 C master wishes to read the LCD0821, the effective address is $51 (0101 0001), since the LSB has to be 1 for an I2 C master read. If we take a standard Phillips 7 bit address of $45 (100 0101), Matrix Orbital’s LCD0821 would describe this Phillips I2 C address as $8A (1000 1010). The read address would be $8B (1000 1011). The unit does not respond to general call address ($00). When communicating in I2 C the LCD0821 will send an ACK on the 9th clock cycle when addressed. When writing to the display module, the display will respond with a ACK when the write has successfully been completed. However if the buffer has been filled, or the module is too busy processing data it will respond with a NAK. When performing a multiple byte read within one I2 C transaction, each byte read from the slave should be followed by an ACK to indicate that the master still needs data, and a NAK to indicate that the transmission is over. The LCD0821 has some speed limitations, especially when run in I2 C mode. Here are some considerations when writing I2 C code: * to be able to read the replies of query commands (eg. cmds 54, 55) the following command must be sent (only needs to be sent once, so this can be done somewhere in init): 254 / 160 / 0 this command puts the reply data in the I2 C output buffer instead of the RS232 output buffer. Please note that due to a 16 byte output buffer, query commands that reply with more than 16 bytes cannot be read (eg cmd Get FileSystem Directory) * 3ms delay between the read commands * 625us delay in between data bytes within a transaction is necessary * 375us between transactions is necessary NOTE These delays are consrevative, and may be decreased based on performance 4.1.2 I2 C Transaction Example The typical I2 C transaction contains four parts: the start sequence, addressing, information, and stop sequence. To begin a transaction the data line, SDA, must toggle from high to low while the clock line, SCL, is high. Next, the display must be addressed using a one byte hexadecimal value, the default to write to the unit is 0x50, while read is 0x51. Then information can be sent to the unit; even when reading, a command must first be sent to let the unit know what type of information it is required to return. After each bit is sent, the display will issue an ACK or NACK as described above. Finally, when communication is complete, the transaction is ended by toggling the data line from low to high while the clock line is high. An example of the use of this algorithm to write a simple “HELLO” message can be seen in 3. Table 3: I2 C Transaction Algorithm START Toggle SDA high to low Address 0x50 Information 0x48 0x45 0x4C 0x4C 0x4F STOP Toggle SDA low to high Matrix Orbital LCD0821 12 4.1.3 Serial Communication In addition to being able to communicate via I2 C the LCD0821 communicates natively through the RS-232 protocol at at a default baud rate of 19,200 bps and is capable of standard baud rates from 9600 to 115,200 bps. Furthermore the LCD0821 is also capable of reproducing any non-standard baud rate in between using values entered into our baud rate generation algorithm and set through command 164 (0xA4). The display module communicates at standard voltage levels of -30V to +30V or at TTL levels of 0 to +5V by setting the Protocol Select Jumpers to TTL. 4.2 Changing the I2 C Slave Address Syntax Parameters Description Hexadecimal Decimal ASCII Parameter adr 0xFE 0x33 [adr] 254 51 [adr] 254 “3” [adr] Length Description 1 The new I2 C write address (0x00 0xFF). This command sets the I2 C write address of the module between 0x00 and 0xFF. The I2 C write address must be an even number and the read address is automatically set to one higher. For example if the I2 C write address is set to 0x50, then the read address is 0x51. NOTE The change in address is immediate. Remembered Default 4.3 Always 0x50 Changing the Baud Rate Syntax Parameters Matrix Orbital Hexadecimal Decimal ASCII Parameter speed 0xFE 0x39 [speed] 254 57 [speed] 254 “9” [speed] Length Description 1 Hex value corresponding to a baud rate. LCD0821 13 Description This command sets the 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 display module can be manually reset to 19,200 baud in the event of an error during transmission, including transmitting a value not listed below, by setting the manual override jumper during power up. However, it should be noted that this command will be ignored until the manual override jumper is removed again. Hex Value 53 29 CF 67 33 22 19 10 8 Baud Rate 1200 2400 4800 9600 19200 28800 38400 57600 115200 NOTE This command is not available in I2 C mode. Remembered Default 4.4 Always 19,200 bps Setting a Non-Standard Baud Rate Syntax Parameters Description Remembered Matrix Orbital Hexadecimal Decimal Parameter speed 0xFE 0xA4 [speed] 254 164 [speed] Length Description 2 Inputed LSB MSB from baud rate formula (12-2047). This command sets the RS-232 port to a non-standard baud rate. The command accepts a two byte parameter that goes directly into the CrystalSpeed modules baud generator. Use the formula, speed = 8×DesiredBaud − 1 to calculate the [speed] for any baud rate setting. The speed can be anywhere from 12 to 2047 which corresponds to a baud range of 977 to 153,800 baud. Setting the baud rate out of this range could cause the display to stop working properly and require the Manual Override jumper to be set. Always LCD0821 14 Examples Crystal Speed 16 Mhz Desired BAUD 13,500 speed = crystalspeed −1 8 ∗ DesiredBaud speed = 148.15 − 1 speed = 16, 000, 000 −1 8 ∗ 13, 500 speed = 147.15 • LSB = 0x93 (rounded) • MSB = 0x00 • Intended Baud Rate: 13,500 baud Actual Baud Rate: 16,000,000 =13,514 Percent Difference: 0.1% 8(147+1) NOTES • Results from the formula are rounded down to the nearest whole number (i.e 73.07 = 73). • This formula becomes less acurate as baud rates increase, due to rounding. • Place the speed result backwards into the formula to receive the actual baud rate. (Baud = CrystalSpeed 8(speed+1) ) • The actual baud rate must be within 3% of the intended baud rate for the device to communicate. NOTES • This command is not available in I2 C mode. 5 5.1 Text Introduction The LCD0821 is an intelligent display module, designed to reduce the amount of code necessary to begin displaying data. This means that it is able to display all ASCII formated characters and strings that are sent to it, which are defined in the current character set. The display module will begin displaying text at the top left corner of the display area, known as home, and continue to print to the display as if it was a page on a typewriter. When the text reaches the bottom right row, it is able to automatically scroll all of the lines up and continue to display text, with the auto scroll option set to on. Matrix Orbital LCD0821 15 5.1.1 Character Set Figure 16: European Character Set Matrix Orbital LCD0821 16 Figure 17: Japanese Character Set NOTE The default font set for these units is Japanese, save for the -WB color option. Please consult the PCN pages at www.matrixorbital.ca or a sales representative to confirm font set availability. 5.1.2 Control Characters In addition to a full text set, the LCD0821 display supports the following ASCII Control characters: 0x08 Backspace 0x0C Clear screen / New page 0x0D Carriage return 0x0A Line feed / New line Matrix Orbital LCD0821 17 5.2 Auto Scroll On Syntax Description Remembered Default 5.3 Description Remembered Hexadecimal 0xFE 0x52 Decimal 254 82 ASCII 254 “R” When auto scrolling is disabled the text will wrap to the top left corner of the display area when the text reaches the end of last row. Yes Clear Screen Description Hexadecimal 0xFE 0x58 Decimal 254 88 ASCII 254 “X” This command will immediately clear all of the contents of the display. Remembered No Syntax 5.5 Yes On Auto Scroll Off Syntax 5.4 Hexadecimal 0xFE 0x51 Decimal 254 81 ASCII 254 “Q” When auto scrolling is on, it causes the display to shift the entire display’s contents up to make room for a new line of text when the text reaches the end of the last row. Changing the Startup Screen Syntax Description Matrix Orbital Hexadecimal 0xFE 0x40 Decimal 254 64 ASCII 254 “@” In order to change the text that is displayed by the LCD0821 when it starts up simply send the command bytes 254 64 followed by the characters that you wish to display, starting from the top left. This command will automatically line wrap the characters that are sent to it. LCD0821 18 Remembered 5.6 Yes Set Auto Line Wrap On Syntax Description Hexadecimal 0xFE 0x43 Decimal 254 67 ASCII 254 “C” Enabling Auto Line Wrap will allow the cursor to automatically wrap over to the next line when the current line is full. NOTE Line wraps may occur in the middle of a word. Remembered 5.7 Set Auto Line Wrap Off Syntax Description Remembered 5.8 Yes Hexadecimal 0xFE 0x44 Decimal 254 68 ASCII 254 “D” Disabling Auto Line Wrap will allow you to change the line configuration. The normally sequentional progression becomes an alternating pattern. Rather than moving from line 1 to 2 to 3, the display will write from line 1 to 3 to 2. For a two line display, this means that a row’s worth of characters written between the first and second lines or after the second will not be displayed on the screen or wrapped. The four line models will see only an alteration in line flow. Yes Set Cursor Position Syntax Parameters Matrix Orbital Hexadecimal Decimal ASCII Parameter col row 0xFE 0x47 [col] [row] 254 71 [col] [row] 254 “G” [col] [row] Length Description 1 Column 1 Row LCD0821 19 Description This command will allow you to manually set the cursor position, which controls the text insertion point, by specifying the [col] and [row] of the new proposed cursor position. NOTE If the cursor position is set past the end of a line it will wrap to the beginning of the next line. Remembered 5.9 No Go Home Syntax Description Remembered Hexadecimal 0xFE 0x48 Decimal 254 72 ASCII 254 “H” This command will return the cursor to the top left corner of the display area, identified as row one, column one. No 5.10 Move Cursor Back Syntax Description Remembered Hexadecimal 0xFE 0x4C Decimal 254 76 ASCII 254 “L” This command will move the cursor back one space. If this command is sent when the cursor is at the home position the cursor will wrap to the last row / column position if line wrap is on. Sending this command will not effect the text displayed on the module, however any characters that are sent will over write the current characters that are being displayed. No 5.11 Move Cursor Forward Syntax Matrix Orbital Hexadecimal Decimal ASCII 0xFE 0x4D 254 77 254 “M” LCD0821 20 Description This command will move the cursor forward one space. If this command is sent when the cursor is at the bottom right position the cursor will wrap back to the home position if line wrap is on. Sending this command will not effect the text displayed on the module, however any characters that are sent will over write the current characters that are being displayed. Remembered No 5.12 Underline Cursor On Syntax Description Remembered Hexadecimal 0xFE 0x4A Decimal 254 74 ASCII 254 “J” This command will cause the LCD0821 to display an underline cursor at the current text insertion point. Yes 5.13 Underline Cursor Off Description Hexadecimal 0xFE 0x4B Decimal 254 75 ASCII 254 “K” This command will turn the the underline cursor off. Remembered Yes Syntax 5.14 Blinking Block Cursor On Syntax Description Remembered Hexadecimal 0xFE 0x53 Decimal 254 83 ASCII 254 “S” This command will cause the LCD0821 to display a block cursor at the current text insertion point. Yes 5.15 Blinking Block Cursor Off Matrix Orbital LCD0821 21 Description Hexadecimal 0xFE 0x54 Decimal 254 84 ASCII 254 “T” This command will turn the block cursor off. Remembered Yes Syntax 6 6.1 Special Characters Introduction The LCD0821 has the ability to create four different sets of eight custom characters and save them to internal banks of memory. Each set of eight can be recalled from memory at any time, and selected characters can be written to the display screen. Characters and sets can be created at any time, saved for later use, and displayed to the screen through the intuitive command structure described below. 6.2 Creating a Custom Character Syntax Parameters Matrix Orbital Hexadecimal Decimal ASCII Parameter refID data 0xFE 0x4E [refID] [data] 254 78 [refID] [data] 254 “N” [refID] [data] Length Description 1 Character reference ID (0-7). 8 Character data. LCD0821 22 Description The LCD0821 allows for upta to eight custom defined characters to be added onto the the character set. A custom character is a five by eight pixel matrix with each row represented by a byte value. For example: 1 1 1 1 1 1 1 1 Remembered 6.3 Custom Character ’h’ 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 Decimal 16 16 16 16 22 25 17 17 Hex 0x10 0x10 0x10 0x10 0x16 0x19 0x11 0x11 Each bit value of one, in the table, represents an on pixel, whereas a value of zero represents a pixel that is turned off. Therefore in order to define custom character ’h’ you would send the command byte prefix 254 followed by the command 78. Next, you will have to select the memory location in which you wish to save the character in. The available memory locations for this command are zero through to seven. After sending the memory location, or [refID], you may then send the eight byte custom character data in sequence from the top to the bottom. Once you have defined a custom character you may display it by sending the display module the [refID]. For example if a custom character was saved in position one, the command to display the custom character, at the current cursor position, would be simply to send the number one to the display module without quotes. No Saving Custom Characters Syntax Parameters Matrix Orbital Hexadecimal Decimal Parameter Bank ID Data 0xFE 0xC1 [Bank] [ID] [Data] 254 193 [Bank] [ID] [Data] Length Description 1 Memory bank to save to (0-4). 1 Character ID (0-7) 8 Character Definition LCD0821 23 Description New to the LCD0821 has added five non-volatile memory banks for custom character storage. This is intended to allow you to create your own custom bar graphs, medium/large numbers and startup screen. However, each memory bank may be used to store a set of any eight custom characters; with the only provision being that memory bank zero contains the characters that will be used in the startup screen. By default the memory banks will be loaded as follows: [Bank] 0 1 2 3 Remembered 6.4 In order to save new custom characters into a memory bank, follow the same process as you would for creating a custom character, see Section 6.2 on page 22, only use 254 193 [Bank Number] before sending the [ID] and character [Data]. Yes Loading Custom Characters Syntax Parameters Description Remembered 6.5 Description Startup screen characters. Horizontal bars Vertical bars Medium numbers Hexadecimal 0xFE 0xC0 [Bank] Decimal 254 192 [Bank] Parameter Length Description Bank 1 Memory bank to save to (0-4). This command is used to load the custom characters into the volatile memory so that they may be used. If custom bar graph or number characters are stored in the memory banks, this command may be used instead of initializing the bar graph / number. To use this command send the command bytes followed by the [Bank] that contains the custom character data that you want to retrieve. No Save Startup Screen Custom Characters Syntax Parameters Matrix Orbital Hexadecimal Decimal Parameter refID data 0xFE 0xC2 [refID] [data] 254 194 [refID] [data] Length Description 1 Character reference ID (0-7). 8 Character data. LCD0821 24 Description Using this command you may create the custom characters. that will be stored in memory bank zero, which will be used in the startup screen. For more information about creating custom characters see Section 6.2 on page 22. NOTES • Changes only take place once the power has been cycled. • This command is the same as sending CMD 254 / 193 / 0 / [ID] / [DATA] Remembered 6.6 Initialize Medium Number Syntax Description Remembered 6.7 Yes Hexadecimal 0xFE 0x6D Decimal 254 109 ASCII 254 “m” This command will load the default medium number characters into the volatile memory. If you have stored your own custom medium numbers, use the ’Load Custom Characters’ command to load your custom character data into the volatile memory. This command will allow you to use the ’Place Medium Numbers’ command. No Place Medium Numbers Syntax Parameters Description Hexadecimal 0xFE 0x6F [Row] [Col] [Digit] Decimal 254 111 [Row] [Col] [Digit] ASCII 254 “o” [Row] [Col] [Digit] Parameter Length Description Row 1 The row number. Col 1 The column number. Digit 1 Medium number to place (0-9). This command will place a medium number (two columns high) at the [row] and [col] specified. NOTE Medium Numbers must be initialized before this command is executed. Remembered Matrix Orbital No LCD0821 25 6.8 Initialize Horizontal Bar Syntax Description Remembered 6.9 Hexadecimal 0xFE 0x68 Decimal 254 104 ASCII 254 “h” This command will load the default horizontal bar characters into the volatile memory. If you have stored your own custom horizontal bar data, use the ’Load Custom Characters’ command instead to load your custom bar data into the volatile memory. This command will allow you to use the ’Place Horizontal Bar’ command. No Place Horizontal Bar Graph Syntax Parameters Description Hexadecimal Decimal ASCII Parameter Col Row Dir 0xFE 0x7C [Col] [Row] [Dir] [Length] 254 124 [Col] [Row] [Dir] [Length] 254 “|” [Col] [Row] [Dir] [Length] Length Description 1 The column number. 1 The row number. 1 The direction of the bar data (0 or 1). Length 1 The length of the bar data. This command will place a bar graph at [row], [column]. A [Dir] value of zero will cause the bar to go right, and one will cause the bar to go left. The [Length] is the size in pixels of the bar graph. NOTES • Horizontal Bars must be initialized before this command is executed. • Bar graphs may be one directional only. Remembered No 6.10 Initialize Narrow Vertical Bar Syntax Matrix Orbital Hexadecimal Decimal ASCII 0xFE 0x73 254 115 254 “s” LCD0821 26 Description This command will load the narrow vertical bar characters into the volatile memory. If you have stored your own custom vertical bar data, use the ’Load Custom Characters’ command instead to load your custom bar data into the volatile memory. This command will allow you to use the ’Place Vertical Bar’ command. NOTE Narrow bars have a width of two pixels. Remembered No 6.11 Initialize Wide Vertical Bar Syntax Description Hexadecimal 0xFE 0x76 Decimal 254 118 ASCII 254 “v” This command will load the wide vertical bar characters into the volatile memory. If you have stored your own custom vertical bar data, use the ’Load Custom Characters’ command instead to load your custom bar data into the volatile memory. This command will allow you to use the ’Place Vertical Bar’ command. NOTE Wide bars have a width of five pixels. Remembered No 6.12 Place Vertical Bar Syntax Parameters Matrix Orbital Hexadecimal Decimal ASCII Parameter Column Length 0xFE 0x3D [Column] [Length] 254 61 [Column] [Length] 254 “=” [Column] [Length] Length Description 1 The column number. 1 The length of the bar data. LCD0821 27 Description This command will place a bar graph at the specified [Column] with the specified [Length]. The [Length] is the size in pixels of the bar graph. NOTES • A Vertical Bar style must be initialized before this command is executed. • Bar graphs may be one directional only. Remembered 7 7.1 No General Purpose Output Introduction General purpose outputs allow you to connect devices, such as LEDs, to the LCD0821 and supply them with up to 20mA of current at 5V. The LCD0821 has 3 GPOs which are software controlled, with functions to turn them on/off and set the power state for the next startup. 7.2 General Purpose Output Off Syntax Parameters Description Hexadecimal 0xFE 0x56 [Num] Decimal 254 86 [Num] ASCII 254 “V” [Num] Parameter Length Description Num 1 GPO number. This command turns OFF general purpose output [num]. NOTE OFF means that the output is pulled HIGH. Remembered 7.3 Yes General Purpose Output On Syntax Parameters Matrix Orbital Hexadecimal Decimal ASCII Parameter Num 0xFE 0x57 [Num] 254 87 [Num] 254 “W” [Num] Length Description 1 GPO number. LCD0821 28 Description This command turns ON general purpose output [num]. The standard GPO’s on the LCD0821 output 20mA of current at 5V. NOTE ON means the output is pulled LOW. Remembered 7.4 Yes Set Startup GPO state Syntax Parameters Description Hexadecimal 0xFE 0xC3 [Num] [state] Decimal 254 195 [Num] [state] Parameter Length Description Num 1 GPO number. state 1 Startup state (0: Off, 1: On) This command will set the startup state for the GPO on the next power up. A value of one will cause the GPO to be off on the next startup while a value of one will cause the GPO to be on. NOTE This command does not affect the current state of the GPO. Remembered 8 8.1 Always Display Functions Introduction The LCD0821 employs software controlled display settings, which allow for control over, clearing the screen, changing the brightness and contrast or setting timers for turning it on or off. The combination of these allow you complete software control over your display’s appearance. 8.2 Display On Syntax Parameters Matrix Orbital Hexadecimal Decimal ASCII Parameter min 0xFE 0x42 [min] 254 66 [min] 254 “B” [min] Length Description 1 Minutes before turning the display on (0 to 90). LCD0821 29 8.3 Description This command turns the backlight on after the [minutes] timer has expired, with a ninety minute maximum timer. A time of 0 specifies that the backlight should turn on immediately and stay on. When this command is sent while the remember function is on, the timer will reset and begin after power up. Remembered Default Yes 0 Display Off Syntax Description Remembered 8.4 Yes Set Brightness Syntax Parameters Description Remembered Default 8.5 Hexadecimal 0xFE 0x46 Decimal 254 70 ASCII 254 “F” This command turns the backlight off immediately. The backlight will remain off until a ’Display On’ command has been received. Hexadecimal Decimal Parameter brightness 0xFE 0x99 [brightness] 254 153 [brightness] Length Description 1 Display brightness setting (0 to 255). This command sets the display [brightness]. If the remember function is on, this command acts the same as ’Set and Save Brightness’. Yes 255 Set and Save Brightness Description Hexadecimal 0xFE 0x98 [brightness] Decimal 254 152 [brightness] Parameter Length Description brightness 1 Backlight setting (0 to 255). This command sets and saves the display [brightness] as default. Remembered Always Syntax Parameters Matrix Orbital LCD0821 30 8.6 Set Contrast Syntax Parameters Description Hexadecimal 0xFE 0x50 [contrast] Decimal 254 80 [contrast] ASCII 254 “P” [contrast] Parameter Length Description contrast 1 Contrast value (0 to 255). This command sets the display’s contrast to [contrast], where [contrast] is a value between 0x00 and 0xFF (between 0 to 255). Lower values cause ‘on’ elements in the display area to appear lighter, while higher values cause ‘on’ elements to appear darker. Lighting and temperature conditions will affect the actual value used for optimal viewing. Individual display modules will also differ slightly from each other in appearance. In addition, values for optimal viewing while the display backlight is on may differ from values used when backlight is off. This command does not save the [contrast] value, and is lost after power down; but this command has the option of remembering the settings when issued with the Remember function ‘on’ . When this is the case, this command is the same as the Set and Save Contrast command. NOTE This command has only 32 levels for X-Board based displays, meaning eight contrast settings will have the same single effect. Efectively, values 0 through 7, 8 through 15, and so on will result in the same setting. Remembered Default 8.7 Yes 128 Set and Save Contrast Syntax Parameters Matrix Orbital Hexadecimal Decimal Parameter contrast 0xFE 0x91 [contrast] 254 145 [contrast] Length Description 1 Contrast value (0 to 255). LCD0821 31 Description This command sets the display’s contrast to [contrast], where [contrast] is a value between 0x00 and 0xFF (between 0 to 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 display modules will also differ slightly from each other in appearance. In addition, values for optimal viewing while the display backlight is on may differ from values used when backlight is off. NOTE This command saves the [contrast] value so that it is not lost after power down. Remembered Default 9 9.1 Yes 128 Data Security Introduction Ensuring that your LCD0821 display’s exactly what you want it to can be the difference between a projects success and failure. This is why we incorporate features such as Data Lock into the LCD0821 With this new feature you now are in control over of how and when settings will be changed so there is no need to worry about the module acting exactly like you expected it to because all the settings may be locked and remembered for the next power up. 9.2 Set Remember Syntax Parameters Matrix Orbital Hexadecimal Decimal Parameter switch 0xFE 0x93 [switch] 254 147 [switch] Length Description 1 0: Do not remember, 1: Remember LCD0821 32 Description This command allows you to switch the remember function on and off. To use the remember function, set remember to on, then set all of the settings that you wish to save, settings that are listed as ’Remember: Yes’ support being saved into the non-volatile memory. After you have set all of the commands that you wish to save, you may then cycle the power and check the display settings to ensure that all the settings have been saved. If you wish to use remember again after cycling the power, you must set it to on again. NOTES • Writing to non-volatile memory is time consuming and slows down the operation of the display. • Non-volatile memory has a ‘write limit’ and may only be changed approximately 100,000 times. Remembered Default 9.3 No Do not remember Data Lock Syntax Parameters Matrix Orbital Hexadecimal Decimal Parameter level 0xFE 0xCA 0xF5 0xA0 [level] 254 202 245 160 [level] Length Description 1 Sets the data lock level LCD0821 33 Description Paranoia allows you to lock the module from displaying information, as well as enables the protection of the filesystem and module settings. Each bit corresponds corresponds to a different lock level, while sending a zero will unlock your display as the following tables explains: Bit 0-2 3 Data Lock Level Reserved Communication Speed Lock 4 Setting Lock 5 6 Reserved Command Lock 7 Display Lock Description Should be left 0 When this bit is set (1) the Baud Rate and I2 C Slave address are locked When this bit is set (1) the display settings such as backlight, contrast and GPO settings are locked. (Internal EEPROM) Should be left 0 When this bit is set (1) all commands but commands 202/203 are locked. (cmd lock) When this bit is set (1) the module is locked from displaying any new information. (text lock) NOTES • Sending a new data lock level will override the previous data lock level. • Data lock levels may be combined. Remembered Default Examples Always 0 Hex 0x00 0x50 9.4 Dec 0 80 Binary 0 01010000 Description Unlock Setting and Command Lock Set and Save Data Lock Syntax Matrix Orbital Hexadecimal Decimal 0xFE 0xCB 0xF5 0xA0 [level] 254 203 245 160 [level] LCD0821 34 Parameters Description Remembered Default 9.5 Parameters Description Remembered Hexadecimal 0xFE 0x34 [data] Decimal 254 52 [data] ASCII 254 “4” [data] Parameter Length Description data 16 Writes the customer data Writes the customer Data. 16 Bytes of data can be saved in non-volatile memory. No Read Customer Data Description Hexadecimal 0xFE 0x35 Decimal 254 53 ASCII 254 “5” Reads whatever was written by Write Customer Data. Remembered No Syntax 10 Always 0 Write Customer Data Syntax 9.6 Parameter Length Description level 1 Sets the data lock level This command will set and save the data lock level. See the Data Lock section for more information. Miscellaneous 10.1 Introduction This chapter covers the ’Report Version Number’ and ’Read Module Type’ commands. These commands can be particularly useful to find out more information about the display module before contacting technical support. 10.2 Read Version Number Matrix Orbital LCD0821 35 Syntax Description Hexadecimal 0xFE 0x36 Decimal 254 54 ASCII 254 “6” This command will return a byte representing the version of the module, see the following table as an example: Hex Value 0x19 0x57 Remembered Version Number Version 1.9 Version 5.7 No 10.3 Read Module Type Syntax Matrix Orbital Hexadecimal Decimal ASCII 0xFE 0x37 254 55 254 “7” LCD0821 36 Description Remembered Matrix Orbital This command will return a hex value corresponding to the the model number of the module see the following table: Hex 1 5 7 9 B D F 13 15 21 23 25 27 29 2B 31 33 35 37 39 3B 3D 3F 41 43 45 47 49 4B 4D 4F 51 53 55 57 5B 71 73 77 79 No Product ID LCD0821 LCD2041 LCD4041 LK204-25 VFD2021 VFD4021 VK204-25 GLC24064 GLK24064-25 Unused Unused GLK24064-16-1U-USB GLK19264-7T-1U-USB GLK12232-16-SM LK204-7T-1U LK404-AT LK402-12 LK204-25PC VK202-24-USB VK204-24-USB VK162-12 PK202-25 MOS-AL-202A MOS-AP-202A MOS-AL-082 MOS-AV-204 MOS-AV-402 VK402-12 LK402-25 PK204-25 MOS XBoard-S MOU LK202-25-USB LK204-25-USB LK162-12-TC Unused LK404-25 Unused GLT480282 LCD0821 Hex 2 6 8 A C E 10 14 16 22 24 26 28 2A 2C 32 34 36 38 3A 3C 3E 40 42 44 46 48 4A 4C 4E 50 52 54 56 58 5C 72 74 78 7A Product ID LCD2021 LCD4021 LK202-25 LK404-55 VFD2041 VK202-25 GLC12232 Unused Unused GLK12232-25 GLK12232-25-SM GLK24064-16-1U GLK12232-16 GLK19264-7T-1U LK204-7T-1U-USB MOS-AV-162A LK162-12 LK202-24-USB LK204-24-USB PK162-12 MOS-AP-162A MOS-AL-162A MOS-AV-202A PK202-24-USB MOS-AL-204 MOS-AL-402 LK082-12 VK404-55 VK402-25 Unused MOI XBoard-I XBoard-U VK202-25-USB VK204-25-USB Unused GLK240128-25 VK404-25 GLT320240 GLT240128 37 11 Command Summary 11.1 Communications Description Changing the I2 C Slave Address Changing the Baud Rate Setting a Non-Standard Baud Rate Syntax Hexadecimal Decimal ASCII Hexadecimal Decimal ASCII Hexadecimal Decimal 0xFE 0x33 [adr] 254 51 [adr] 254 “3” [adr] 0xFE 0x39 [speed] 254 57 [speed] 254 “9” [speed] 0xFE 0xA4 [speed] 254 164 [speed] Syntax Hexadecimal Decimal ASCII Hexadecimal Decimal ASCII Hexadecimal Decimal ASCII Hexadecimal Decimal ASCII Hexadecimal Decimal ASCII Hexadecimal Decimal ASCII Hexadecimal Decimal ASCII Hexadecimal Decimal ASCII 0xFE 0x51 254 81 254 “Q” 0xFE 0x52 254 82 254 “R” 0xFE 0x58 254 88 254 “X” 0xFE 0x40 254 64 254 “@” 0xFE 0x43 254 67 254 “C” 0xFE 0x44 254 68 254 “D” 0xFE 0x47 [col] [row] 254 71 [col] [row] 254 “G” [col] [row] 0xFE 0x48 254 72 254 “H” Page 13 13 14 11.2 Text Description Auto Scroll On Auto Scroll Off Clear Screen Changing the Startup Screen Set Auto Line Wrap On Set Auto Line Wrap Off Set Cursor Position Go Home Matrix Orbital LCD0821 Page 18 18 18 18 19 19 19 20 38 Description Move Cursor Back Move Cursor Forward Underline Cursor On Underline Cursor Off Blinking Block Cursor On Blinking Block Cursor Off Syntax Hexadecimal Decimal ASCII Hexadecimal Decimal ASCII Hexadecimal Decimal ASCII Hexadecimal Decimal ASCII Hexadecimal Decimal ASCII Hexadecimal Decimal ASCII 0xFE 0x4C 254 76 254 “L” 0xFE 0x4D 254 77 254 “M” 0xFE 0x4A 254 74 254 “J” 0xFE 0x4B 254 75 254 “K” 0xFE 0x53 254 83 254 “S” 0xFE 0x54 254 84 254 “T” Page 20 20 21 21 21 21 11.3 Special Characters Description Creating a Custom Character Saving Custom Characters Loading Custom Characters Save Startup Screen Custom Characters Initialize Medium Number Place Medium Numbers Initialize Horizontal Bar Place Horizontal Bar Graph Matrix Orbital Syntax Hexadecimal Decimal ASCII Hexadecimal Decimal Hexadecimal Decimal Hexadecimal Decimal Hexadecimal Decimal ASCII Hexadecimal Decimal ASCII Hexadecimal Decimal ASCII Hexadecimal Decimal ASCII 0xFE 0x4E [refID] [data] 254 78 [refID] [data] 254 “N” [refID] [data] 0xFE 0xC1 [Bank] [ID] [Data] 254 193 [Bank] [ID] [Data] 0xFE 0xC0 [Bank] 254 192 [Bank] 0xFE 0xC2 [refID] [data] 254 194 [refID] [data] 0xFE 0x6D 254 109 254 “m” 0xFE 0x6F [Row] [Col] [Digit] 254 111 [Row] [Col] [Digit] 254 “o” [Row] [Col] [Digit] 0xFE 0x68 254 104 254 “h” 0xFE 0x7C [Col] [Row] [Dir] [Length] 254 124 [Col] [Row] [Dir] [Length] 254 “|” [Col] [Row] [Dir] [Length] LCD0821 Page 22 23 24 24 25 25 26 26 39 Description Initialize Narrow Vertical Bar Initialize Wide Vertical Bar Place Vertical Bar Syntax Hexadecimal Decimal ASCII Hexadecimal Decimal ASCII Hexadecimal Decimal ASCII 0xFE 0x73 254 115 254 “s” 0xFE 0x76 254 118 254 “v” 0xFE 0x3D [Column] [Length] 254 61 [Column] [Length] 254 “=” [Column] [Length] Page 26 27 27 11.4 General Purpose Output Description General Purpose Output Off General Purpose Output On Set Startup GPO state Syntax Hexadecimal Decimal ASCII Hexadecimal Decimal ASCII Hexadecimal Decimal 0xFE 0x56 [Num] 254 86 [Num] 254 “V” [Num] 0xFE 0x57 [Num] 254 87 [Num] 254 “W” [Num] 0xFE 0xC3 [Num] [state] 254 195 [Num] [state] Page 28 28 29 11.5 Display Functions Description Display On Display Off Set Brightness Set and Save Brightness Set Contrast Set and Save Contrast Matrix Orbital Syntax Hexadecimal Decimal ASCII Hexadecimal Decimal ASCII Hexadecimal Decimal Hexadecimal Decimal Hexadecimal Decimal ASCII Hexadecimal Decimal 0xFE 0x42 [min] 254 66 [min] 254 “B” [min] 0xFE 0x46 254 70 254 “F” 0xFE 0x99 [brightness] 254 153 [brightness] 0xFE 0x98 [brightness] 254 152 [brightness] 0xFE 0x50 [contrast] 254 80 [contrast] 254 “P” [contrast] 0xFE 0x91 [contrast] 254 145 [contrast] LCD0821 Page 29 30 30 30 31 31 40 11.6 Data Security Description Set Remember Data Lock Set and Save Data Lock Write Customer Data Read Customer Data Syntax Hexadecimal Decimal Hexadecimal Decimal Hexadecimal Decimal Hexadecimal Decimal ASCII Hexadecimal Decimal ASCII 0xFE 0x93 [switch] 254 147 [switch] 0xFE 0xCA 0xF5 0xA0 [level] 254 202 245 160 [level] 0xFE 0xCB 0xF5 0xA0 [level] 254 203 245 160 [level] 0xFE 0x34 [data] 254 52 [data] 254 “4” [data] 0xFE 0x35 254 53 254 “5” Syntax Hexadecimal Decimal ASCII Hexadecimal Decimal ASCII 0xFE 0x36 254 54 254 “6” 0xFE 0x37 254 55 254 “7” Page 32 33 34 35 35 11.7 Miscellaneous Description Read Version Number Read Module Type Page 35 36 11.8 Command By Number Command Hex 0x33 0x34 0x35 0x36 0x37 0x39 0x3D 0x40 0x42 0x43 0x44 0x46 Matrix Orbital Description Page Dec ASCII 51 “3” 52 “4” 53 “5” 54 “6” 55 “7” 57 “9” 61 “=” 64 “@” 66 “B” 67 “C” 68 “D” 70 “F” Changing the I2 C Slave Address Write Customer Data Read Customer Data Read Version Number Read Module Type Changing the Baud Rate Place Vertical Bar Changing the Startup Screen Display On Set Auto Line Wrap On Set Auto Line Wrap Off Display Off LCD0821 13 35 35 35 36 13 27 18 29 19 19 30 41 Command Hex 0x47 0x48 0x4A 0x4B 0x4C 0x4D 0x4E 0x50 0x51 0x52 0x53 0x54 0x56 0x57 0x58 0x68 0x6D 0x6F 0x73 0x76 0x7C 0x91 0x93 0x98 0x99 0xA4 0xC0 0xC1 0xC2 Description Page Dec ASCII 71 “G” 72 “H” 74 “J” 75 “K” 76 “L” 77 “M” 78 “N” 80 “P” 81 “Q” 82 “R” 83 “S” 84 “T” 86 “V” 87 “W” 88 “X” 104 “h” 109 “m” 111 “o” 115 “s” 118 “v” 124 “|” 145 147 152 153 164 192 193 194 0xC3 195 Matrix Orbital Set Cursor Position Go Home Underline Cursor On Underline Cursor Off Move Cursor Back Move Cursor Forward Creating a Custom Character Set Contrast Auto Scroll On Auto Scroll Off Blinking Block Cursor On Blinking Block Cursor Off General Purpose Output Off General Purpose Output On Clear Screen Initialize Horizontal Bar Initialize Medium Number Place Medium Numbers Initialize Narrow Vertical Bar Initialize Wide Vertical Bar Place Horizontal Bar Graph Set and Save Contrast Set Remember Set and Save Brightness Set Brightness Setting a Non-Standard Baud Rate Loading Custom Characters Saving Custom Characters Save Startup Screen Custom Characters Set Startup GPO state LCD0821 19 20 21 21 20 20 22 31 18 18 21 21 28 28 18 26 25 25 26 27 26 31 32 30 30 14 24 23 24 29 42 12 Appendix 12.1 Specifications 12.1.1 Environmental Table 56: Environmental Specifications Standard Temperature Extended Temperature Operating Temperature 0◦ C to +50◦ C -20◦ C to +70◦ C ◦ ◦ Storage Temperature -20 C to +70 C -30◦ C to +80◦ C Operating Relative Humidity 90% max non-condensing Vibration (Operating) 4.9 m/s2 XYZ directions Vibration (Non-Operating) 19.6 m/s2 XYZ directions Shock (Operating) 29.4 m/s2 XYZ directions Shock (Non-Operating) 490 m/s2 XYZ directions 12.1.2 Electrical Table 57: Electrical Specifications Standard Wide Voltage (V) Supply Voltage +5Vdc ±0.25V +9V to +15V Minimum Current 45mA typical Backlight On (YG & IY) add 65mA (110mA) typical Backlight On (R) add 60mA (105mA) typical Backlight On (GW & WB) add 20mA (65mA) typical 12.1.3 Optical Table 58: Optical Specifications Character x Lines 8 columns x 2 rows Module Size 58.00mm x 32.00mm x 26.80mm Character Size 2.96mm x 5.56mm Display Size 27.80mm x 11.49mm LED Backlight Half-Life (YG & IY) 50, 000 hours typical LED Backlight Half-Life (R) 20, 000 hours typical LED Backlight Half-Life (GW & WB) 10, 000 hours typical Matrix Orbital LCD0821 43 NOTE To prolong life, it is recommended that the backlight be turned off when the display is not in use. 12.2 Physical Layout Matrix Orbital LCD0821 44 Figure 18: Physical Diagram Matrix Orbital LCD0821 45 12.3 Ordering Information LCD 1 08 2 2 3 1 4 -R 5 -V 6 -E 7 Table 59: Part Numbering Scheme # 1 2 3 4 Description Screen Type Width Height GPO 5 Color (Text/Background) 6 Input Voltage 7 Temperature Options LCD: Liquid Crystal Display 08: Eight Character Columns 2: Two Character Rows 1: Single GPO NP: Standard Grey/Yellow-Green GW: Grey/White WB: White/Blue R: Red/Black IY: Yellow/Black NP: Standard (4.75-5.25V) -V: Extended Volatge (9.00-15.0V) NP: Standard (0◦ C to +50◦C) -E: Extended Temperature (-20◦ C to +70◦ C) Table 60: Part Options 12.4 Definitions E Extended Temperature (-20C to 70C) V Wide Voltage (+9 to +15Vdc) GW Grey Text / White Background WB White Text / Blue Background R Inverse Red IY Inverse Yellow MSB Most Significant Byte LSB Least Significant Byte Matrix Orbital LCD0821 46 12.5 Contacting Matrix Orbital Telephone Sales: 1(403)229-2737 Support: 1(403)204-3750 On The Web Sales: http://www.MatrixOrbital.com Support: http://www.MatrixOrbital.ca Forums: http://www.lcdforums.com 12.6 Revision History Revision 2.0 2.1 Matrix Orbital Table 61: Revision History Description Author Initial Manual Matrix Orbital Updated Backlight Life Clark LCD0821 47