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Related Manuals for Matrix Orbital VK204-25
Summary of Contents for Matrix Orbital VK204-25
- Page 1 VK204-25 Technical Manual Revision: 1.0...
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Page 2: Table Of Contents
1.5 Trying Out the VK204-25 ........ - Page 3 8.2 Options ..........33 9 Appendix: Glossary Matrix Orbital VK204-25...
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Page 4: Introduction
1.1 What to Expect From the VK204-25 The VK204-25 is designed as the display unit for an associated controller. The controller may be any- thing from a single board, special purpose micro-controller to a PC, depending on the application. This controller is responsible for what is displayed on the screen of the display. -
Page 5: Setup For Testing
4. Connect the power connector, making sure that the +5V goes to V+. Turn on the power: the display should come on. 1.5 Trying Out the VK204-25 The unit should be connected to power. The PC and display should be on. To experiment with typing text, run a PC terminal program, such as Hyperterm. -
Page 6: Trying Out A Keypad
Moves the cursor one position to the left and clears that position. NOTE These command characters are not guaranteed to work on other Matrix Orbital display modules. To exercise some of the other features of the display a program (in any convenient language such as Basic or C) will need to be written in order to issue the required command strings. -
Page 7: Connections
’map’ these characters to the ones marked on the keypad, which will likely be different. 2 Connections 2.1 Connector Pinout Refer to the diagram below for this chapter. Figure 2: Electrical Connections The display has four connectors; Matrix Orbital VK204-25... -
Page 8: Power And I C Connections
Connector pinout is as follows; Figure 3: Power Connector Table 3: Connector Pinout Pin 4 Ground Pin 3 SDA (I C data) Pin 2 SCL (I C clock) Pin 1 +5.0 VDC (+7 to +15 VDC with wide voltage option) Matrix Orbital VK204-25... -
Page 9: Five Volt Modules
Figure below. Figure 4: Wiring for 5V Modules Matrix Orbital can supply an adapter cable designed for use with the display when it’s installed in a PC. The cable is wired as shown in the Figure below. NOTE This connector does not provide connections for I Figure 5: 5V Power Cable 2.1.3 Wide Voltage Range Modules... -
Page 10: Rs-232 Communications
Figure 6: Wiring for 12V Modules Matrix Orbital can supply an adapter cable designed for use with the display module when it’s installed in a PC. The cable is wired as shown in the Figure below. Figure 7: 12V Power Cable 2.1.4 RS-232 Communications... -
Page 11: Configuring Rs-232 And I
C address of 0x5C. • RS-232 port: J0, J1, J2 - control baud rate. RS-232 format is 8N1 (8 bits, no parity, one stop bit) • I C port: J0, J1, J2, J3 - sets slave peripheral address Matrix Orbital VK204-25... -
Page 12: I 2 C Communications
Matrix Orbital module processes data. Basically the reason why a Matrix Orbital module might fail to receive a byte correctly is that it was unable to process the byte previous before the failed byte was transmitted. Because the module cannot possibly know that it would be unable to store the byte before the next byte was received it cannot know to not ACK. -
Page 13: General Purpose Outputs
/ write bit. If we take a standard Phillips 7bit address of 45hex this would be in binary 1000101. This is 7bits. Matrix Orbital would describe the Phillips I C address of 45hex as 8Ahex. The read address would be 8Bhex. -
Page 14: Displaying Text
For instance if the external device is a relay it must be fully clamped using a diode and capacitor to absorb any generated back electro-motive force (EMF). Figure 12: Clamping a Relay 3 Displaying Text This chapter describes the various text display commands in detail. Matrix Orbital VK204-25... -
Page 15: General
3.1 General Text is displayed on the VK204-25 using the built in 5x7 dot matrix font, in addition to up to 8 user defined characters. 3.2 The Built In Character Font The display includes a built in 5x7 dot matrix font with the full range of ASCII characters plus a variety of extended characters, as shown in the Figure below. -
Page 16: Writing Text To The Display
When auto scrolling is disabled, text will wrap to the top left corner of the display area. Existing text in the display area is not erased before new text is placed. A series of ’spaces’ followed by a “Cursor home” command may be used to erase the top line of text. Matrix Orbital VK204-25... -
Page 17: Set Cursor Position (254 71 [Column] [Row])
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. 4 Keypad Interface This chapter describes the keypad interface and associated commands in detail. Matrix Orbital VK204-25... -
Page 18: General
This also prevents electrical noise which is often caused by continuous key scans. NOTE The keypads may be laid out in a different pattern. If this is the case, the user will need to interpret the key codes differently. Table 6: Keypad Layout Columns Rows Matrix Orbital VK204-25... -
Page 19: C Interface
The host system detects the press of a key and simulates an auto repeat inside the host system until the key release is detected. Matrix Orbital VK204-25... -
Page 20: Auto Repeat Mode Off (254 96)
It may also be used to, in effect, reset the keypad in case the host application resets for whatever reason. Matrix Orbital VK204-25... -
Page 21: Poll Keypad (254 38)
This command defines the 8 special / user characters to be blocks suitable for use in drawing narrow (2 pixel) vertical bar graphs. Any previously existing definitions will be lost. Once this command has been issued, any number of vertical bar graphs may be drawn unless the characters are redefined by another command Matrix Orbital VK204-25... -
Page 22: Draw Vertical Bar Graph (254 61 [Column] [Height])
The characters are defined by issuing the command 254 78 [c] followed by 8 bytes to define the character. [c] is the character number (0x00 to 0x07). The 8 bytes are mapped as shown below; Matrix Orbital VK204-25... -
Page 23: Initialize Large Digits (254 110)
This command defines the 8 special / user characters to be blocks suitable for use in drawing large digits. Any previously existing definitions will be lost. Once this command has been issued, any number of large characters may be placed until the characters are redefined by another command. Matrix Orbital VK204-25... -
Page 24: Place Large Digit 254 35 [Col] [Digit]
This command sets the display’s brightness to [brightness], where [brightness] is a value between 0x00 and 0x03 (between 0 and 3) according to the table below. Table 9: Brightness Settings Hex Values Brightness 0x00 100% 0x01 0x02 0x03 Matrix Orbital VK204-25... -
Page 25: Display On (254 66[Minutes])
LK202-25 - 0x08 LK204-25 - 0x09 LK404-55 - 0x0A VFD2021 - 0x0B VFD2041 - 0x0C VFD4041 - 0x0D VK202-25 - 0x0E VK204-25 - 0x0F GLC12232 - 0x10 GLC24064 - 0x13 GLK24064-25 - 0x15 GLK12232-25 - 0x22 LK404-AT - 0x31 LK402-12 - 0x33... -
Page 26: Read Version Number (254 54)
0 to 255. Bytes are usually specified in either decimal or hexadecimal (base 16) form for convenience, since binary numbers are confusing to deal with directly. Hexadecimal (hex) numbers are particularly convenient because Matrix Orbital VK204-25... -
Page 27: Ascii Characters
ASCII number 0 by mistake it will actually give the value 48 decimal (30 hex) to the parameter, which is wrong. In the tables given in the following sections ASCII characters are shown as ’A’, with single quotes. Matrix Orbital VK204-25... -
Page 28: Text Commands
254 ’H’ to the top left of the display area Block cursor on FE 53 Turns 254 83 blinking block 254 ’S’ cursor Block cursor off FE 54 Turns 254 84 blinking block 254 ’T’ cursor Matrix Orbital VK204-25... -
Page 29: Keypad Interface Commands
FE 7E [0x00|0x01] Applies to key- 254 126 [0|1] only.0x00 254 ’~’ [0|1] = 200 ms type- matic,0x01 key down/key up codes sent. Auto repeat mode off FE 60 Applies to keypad 254 96 only. 254 ’‘’ Matrix Orbital VK204-25... -
Page 30: Bar Graphs And Special Characters
Initializes the user character set to graph 254 118 make wide vertical bar graphs. 254 ’v’ Initialize thin vertical bar FE 73 Initializes the user character set to graph 254 115 make narrow vertical bar graphs. 254 ’s’ Matrix Orbital VK204-25... -
Page 31: Miscellaneous Commands
0x12 (i.e. 1 to 18 decimal). 7.7 Miscellaneous Commands Table 19: Miscellaneous Commands Command Syntax Default Notes Clear display FE 58 Clears screen of 254 88 text and graphics, 254 ’X’ places text cursor at top left. Matrix Orbital VK204-25... - Page 32 This com- 254 ’7’ mand will return a 1-byte hex value. Read Version Number FE 36 Reads 254 54 firmware ver- 254 ’6’ sion number of the module. This command will return a 1-byte hex value. Matrix Orbital VK204-25...
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Page 33: Appendix: Specifications And Options
3.6 x 5.4 mm (XxY) Line pitch 5.95 mm Dot Size 0.4 x 0.5 mm (XxY) Dot Pitch 0.5 x 0.7 mm (XxY) Luminance Min. 350cd/m (100fL) min Color of Illumination Blue/Green Display Life 100,000 hours typical Matrix Orbital VK204-25... - Page 34 C/minute, direct hit with a hard material to the glass surface ◦ (especially to the exhaust pipe) may CRACK the glass. • Steady repetition of a static message displaying, longer then 5 hours in a day may cause a phosphor burnout problem. Matrix Orbital VK204-25...
- Page 35 Figure 16: Physical Layout Matrix Orbital VK204-25...
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Page 36: Options
8.2 Options Table 24: Options Available on VK204-25 Extended Temperature Wide Voltage Wide Voltage with Efficient Switching Power Supply 9 Appendix: Glossary Table 25: Appendix: Glossary ASCII American Standard Code for Information Interchange. A 7 bit binary code representing the English alpha- bet, decimal numbers and common punctuation marks. - Page 37 RS-232 Short for recommended standard-232C, a standard in- terface approved by the Electronic Industries Associa- tion (EIA) for connecting serial devices Matrix Orbital VK204-25...
- Page 38 1 bit is transmitted at a time Version Number This refers to the firmware revision number of the module Volatile Memory Temporary memory. Once the power supply is turned off volatile memory is then erased Matrix Orbital VK204-25...
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