LCD0821 Matrix Orbital, LCD0821 Datasheet
LCD0821
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LCD082
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LCD0821 Summary of contents
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... LCD0821 rev 2 LCD0821 User Manual 1 ...
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... Table of Contents 1. Introduction.............................................................................................................................. 4 1.1 What it Does ..................................................................................................................................... 4 1.2 What it Does Not Do ........................................................................................................................ 4 1.3 Setup for Testing .............................................................................................................................. 4 1.4 Trying Out your LCD0821 ............................................................................................................... 5 2. Connections and Configuration............................................................................................. 7 2.1 Connector Pinout .............................................................................................................................. 7 2 2.1.1 Power and I C Connections .................................................................................................... 7 2.1.2 RS-232 Communications ........................................................................................................ 9 2.1.3 Applying Power via the RS-232 Connector.......................................................................... 10 2 ...
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... New PCB. Aug 2002 With TTL select. LCD0821 rev 2 3 ...
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... The LCD0821 does not include a keypad interface. 1.3 Setup for Testing Before setting up your application you may want to try out the LCD0821. This is easily done with a PC. Here's what you'll need: A power cable with a 4 pin connector (same connector as used to connect a 3.5 inch floppy drive) ...
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... If you want your code to be portable, use the appropriate commands listed later in the manual instead. If you want to exercise some of the other features of the LCD0821 you'll need to write a program (in any convenient language such as Basic issue the required command strings. Most terminal programs are ...
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... You probably won't need to do this at the initial testing stage. If you've reached this point and operation is normal, you can be confident that your LCD0821 works properly. LCD0821 rev 2 6 ...
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... Connections and Configuration 2.1 Connector Pinout Refer to the diagram below for this chapter. The LCD0821 has four connectors: Connector Function 2 pin header General purpose output (see section 0) 4 pin Power and I 3 pin header RS-232/power (see section 2.1.3) Jumpers Sets RS232 speed and I2C address 2 2 ...
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... Pin 4 Ground 2.1.1.1 Five Volt Modules If the LCD0821 is used tempting to plug a spare power connector into the unit. Don't do this! Wiring for the PC power connector and that required for the LCD0821 are different as shown in Figure 2-3 below. Figure 2-3 Power Connector wiring differences If you don't want to modify cable wiring yourself, Matrix Orbital can supply an adapter cable designed to use with the LCD0821 when it's installed ...
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... PC. The cable is wired as shown in Figure 2-6 below. 2.1.2 RS-232 Communications 2.1.2.1 Connections A 3 pin strip header is provided for RS-232 communications. Power may also be supplied via this connector if desired. See Figure 2-7 for pin connections. LCD0821 rev wiring GND +12 V ...
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... SIP. If power applied using the 3 pin strip header. 2.1.4 TTL Communications The LCD0821 does not communicate with TTL by default, the following modification must be made: Solder the jumper in the picture below: 2.1.5 Configuring RS-232 and I ...
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... The reason for this situation in deference to situations you might be familiar with (i.e. memory chips, etc…) is that the Matrix Orbital module employs a microprocessor to perform these data storage functions. A memory chip takes care of these things entirely with in hardware subsystems that operate at the same speed as the transmission themselves. LCD0821 rev 2 Slave Address J3 J2 ...
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... The LCD0821 uses a standard Phillips 7bit address as defined by Phillips. How ever Matrix Orbital 2 th specify I C address in 8bits. The 8 read/write bit take a standard Phillips 7bit address of 45hex this would be in binary 1000101. This is 7bits. If one adds the read write bit to this 7bit address and you assume that you are writing one gets 10001010 ...
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... Note: The GPOs do not have any over current or over/under voltage protection so care must be taken when using them. For instance if the external device is a relay it must be fully clamped (using a diode and capacitor – see Figure 2-) to absorb any generated back electro-motive force (EMF 100 uF LCD0821 rev 2 Jumper 240 ohm resistor ...
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... Text is displayed on the LCD0821 using the built- dot matrix font (plus user-defined characters. 3.2 The Built-In Character Font The LCD0821 includes a built- dot matrix font with the full range of ASCII characters plus a variety of extended characters, as shown in Figure 3-1. LCD0821 rev 2 Figure 3-1 Character Set ...
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... Disables automatic line wrapping. 3.4.3 Auto scroll on (254 81) When auto scrolling is on, it causes the LCD0821 to shift the entire display’s contents up to make room for a new line of text when the text reaches the scroll position (the bottom right character position). Default is OFF ...
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... Cursor right (254 77) Moves the cursor one position to the right but does not erase any character that may be in that position. Note that this command moves the text insertion point even if the cursor is turned off. LCD0821 rev 2 16 ...
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... Define custom character (254 78 [c] [8 bytes]) The LCD0821 allows user defined (custom) characters. These characters occupy the first 8 (0x00 to 0x07) places in the character set (see Figure 3-1). ...
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... A "1" bit indicates an on (black) pixel, a "0" bit indicates an off (clear) pixel. Once defined, a character is displayed simply by issuing a value (0x00 to 0x07) corresponding to the character number. The character will be laid out as follows: LCD0821 rev 2 LSB Data Byte ...
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... Note: Custom characters will be erased if either the "initialize bar graph" or "initialize large digits" commands are issued. LCD0821 rev Cursor Line 19 ...
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... 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 LCD0821 modules will also differ slightly from each other in appearance. In addition, values for optimal viewing while the LCD0821 backlight is on may differ from values used when backlight is off ...
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... LCD0821 - 0x01 LCD2041 - 0x05 LK202-25 - 0x08 VFD2021 - 0x0B VK202-25 - 0x0E GLC12864 - 0x11 GLK12864-25 - 0x14 GLK12232-25 - 0x22 LK402-12 - 0x33 LCD0821 rev 2 LCD2021 - 0x03 LCD1641 - 0x04 LCD4021 - 0x06 LCD4041 - 0x07 LK204-25 - 0x09 LK404-55 - 0x0A VFD2041 - 0x0C VFD4021 - 0x0D VK204-25 - 0x0F ...
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... Chapters 3 and 4 in the same sequence as in the following tables. 6.2 Issuing Commands Commands are issued to the LCD0821 by the controller test setup, commands can be issued to the LCD0821 by means of a BASIC program, using the chr$( ) function. In the tables below, we've shown commands in hex, ASCII and decimal form. All commands begin with the prefix character 0xFE (254 decimal) ...
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... This gives rise to the possibility of confusion when parameters are being set on the LCD0821 For example, the GPO ON and OFF commands use a number to indicate which GPO is being controlled. We're told that acceptable values are All such parameters must use numeric values (i.e. the actual byte values). ...
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... Define custom FE 4E [c][8 bytes] character 254 78 [c][8 bytes] 254 'N' [c][8 bytes] LCD0821 rev 2 Default Notes R Turns off the underline cursor. on Turns on the blinking block cursor. Turns off the blinking block cursor. Moves the cursor one position to the left. If the cursor is already at the beginning of a line it will move to the end of the other line ...
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... General purpose FE 56 output on 254 86 254 'V' General purpose FE 57 output off 254 87 254 'W' LCD0821 rev 2 Default Notes n/a Clears screen of text and graphics, places text cursor at top left. 0x80 Sets display contrast. Compensates for 128 viewing angle. Contrast is a value between 0 and 255 (hex 0 to FF) ...
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... Display Area Character Size Character Pitch Line pitch Dot Size Dot Pitch LED Backlight Life Color of Illumination LCD0821 rev 2 Environmental Specifications Standard Temperature Extended Temperature 0°C to +50°C -20°C to +70°C 90% max non-condensing Electrical Specifications 4.75 - 5.25 Vdc (optional 8 – 15 VDC) ...
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... Options Extended Temperature Wide Voltage LCD0821 rev 2 Figure 7-1 Physical Layout Options Available on LCD0821 ...
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... I² multi- master bus, which means that multiple chips can be connected to the same bus and each one can act as a master by initiating a data transfer. Interface A means by which two systems interact. LCD0821 rev 2 28 ...
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... A port, or interface, that can be used for serial communication, in which only 1 Serial Port bit is transmitted at a time. Version This refers to the firmware revision number of the module. Number Volatile Temporary memory. Once the power supply is turned off volatile memory is Memory then erased. LCD0821 rev 2 29 ...