Matrix-orbital LK202-24-USB Manual de usuario

LK202-24-USBTechnical ManualRevision: 2.0

The display has a secondary power connector used for High Power GPOs. Only if the user is planning onusing GPO 1, GPO 2 and GPO 3 as +12V, should the

Table 4: USB IDVID 0403PID DescriptionFA00 USB 2 Serial CommunicationFA01 MX2 / MX3FA02 MX4 / MX5FA03 LK / VK202-24-USBFA04 LK / VK204-24-USB2.1.3 Alt

2.1.4 Serial TTL CommunicationsFigure 6: Rx / Tx and LED HeadersThe display can be communicated to by Serial at TTL levels. Communication will bypass

Figure 7: Connections2.2.1 Advanced General Purpose Outputs & GPO’s 1 to 3These outputs are capable of controlling high current draw devices, savi

WARNINGS• RPM Reading should not be used at 5V.• There are no current limiting resistors.• Maximum current draw is 1000mA.• Default voltage setting is

2.2.3 GPO 4, GPO 5, and GPO 6Figure 10: General Purpose OutputsGPO’s 4, 5, and 6 are low power ouputs providing +5V at 20mA, enforced by current limit

2.4 The Built In Character FontThe display includes a built in 5x8 dot matrix font with the full range of ASCII characters, plus a varietyof extended

load other fonts.2.5 Writing Text to the DisplayWhen the display receives a character, it displays that character at the position currently defined. Th

2.6.5 Set Cursor Position (254 71 [column][row])This command sets the cursor position (text insertion point) to the [column] and [row] specified. Colum

2.6.12 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 co

ContentsContents ii1 Introduction 11.1 What to Expect From the LK202-24-USB . . . . . . . . . . . . . . . . . . . . . . . . . . . 11.2 What Not to Exp

Table 6: Keypad LayoutColumns1 2 3 4 5 61 A B C D E FRows 2 G H I J K L3 M N O P Q R4 S T U V W XNOTE The keypad connector must be wired with columns

Figure 14: Poll Timing3.3.2 Auto Repeat Mode Off (254 96)(R)This command turns off the auto repeat mode3.3.3 Auto Transmit Keypresses On (254 65)(R)In

3.3.7 Set Debounce Time (254 85 [time])(R)This command sets the time between key press and key read. All key types with the exception of latchedpiezo

4.1.4 Initialize Horizontal Bar Graph (254 104)This command defines the 8 special / user characters to be blocks suitable for use in drawing horizontal

Table 8: Character Values1 2 3 4 56 7 8 9 1011 12 13 14 1516 17 18 19 2021 22 23 24 2526 27 28 29 3031 32 33 34 3536 37 38 39 40Cursor LineNOTE Custom

protocol is used for reading fan speeds and retrieving 1-wire bus information. The basic structure of theprotocol is described in the Table below.Tabl

5.2 Fan and GPO Commands5.2.1 General Purpose Output Off (254 86 [gpo #])This command turns OFF any of the general purpose outputs. [gpo #] is 1 to 6.

5.2.5 Remember GPO / PWM State (254 195 [fan #] [PWM value])This command will set the startup state for all the GPOs. When the device is powered up th

Table 14: Example PWM Values for Index =14Input PWM Actual PWM0 01- 63 25%64 -127 50%128 -191 75%192 -255 100%Frequencies in the range of 9.6Hz to 38.

1. Reset and detect presence.2. ROM command, followed by any required data exchange.3. Device specific function command, followed by any required data

3 Keypad Interface 153.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153.2 Connections . . . . .

6.4.1 Transaction command (254 C8 1 [flags] [Send Bits] [Recieve bits][Send data])The transaction command will perform a single transaction on the 1-wi

Table 17: 1-Wire Error CodesCode Description0x00 Success0x01 Unknown 1-Wire Command0x02 No devices on the bus0x03 Fatal search error6.4.2 Search comma

7.1.1 Remember (254 147 [0|1])This command allows a number of settings, such as cursor state, backlight, etc., to automatically bestored in non-volati

7.1.4 Set Contrast and save (254 145[contrast])This command works in exactly the same way as the "Set contrast" command. The only difference

Table 21: Default ScreenCharacter 1 Character 20Character 21 Character 40If sending more then 10 characters to be stored, add in ~10ms per character d

8 Appendix: Command Summary8.1 GeneralThe operation of the display is controlled by a simple and consistent command set. Commands control;• Text displ

Table 23: Hex Value TableBinary Hex Decimal Binary Hex Decimal0000 0 0 1000 8 80001 1 1 1001 9 90010 2 2 1010 A 100011 3 3 1011 B 110100 4 4 1100 C 12

NOTE The letter “R” in the default column indicates that this state can be saved to non-volatile memory with the “Remember” command.Table 25: Text Com

Command Syntax Default NotesBlock cursor off FE 54254 84254 “T”R Turns off theblinking blockcursor.Cursor left FE 4C254 76254 “L”Moves the cur-sor one

Command Syntax Default NotesAuto transmit key pressesonFE 41254 65254 “A”onRSets auto transmitmode for keypad.Key presses aretransmitted tohost withou

7.1.5 Backlight on (254 66[minutes]) (R) . . . . . . . . . . . . . . . . . . . . . . . . . . 297.1.6 Backlight off (254 70) (R) . . . . . . . . . . .

Command Syntax NotesDraw vertical bar graph ”FE 3D [col][height]254 61 [col][height]254 "="[col][height]Draws a vertical bar graph at column

Command Syntax Default NotesReturn fan RPM FE C1254 193n/a This commandwill return apacket to the hostwith the fan RPMcontained in it.Remember GPO / P

Command Syntax Default NotesSet contrast FE 50 [contrast]254 80 [contrast]254 “P” [contrast]0x80128Sets display con-trast. Compen-sates for viewingang

Command Syntax Default NotesRead module type FE 37254 55254 “7”see table Reads the moduletype.Set serial number FE 34 [byte1][byte2]254 52[byte1][byte

9 Appendix: Specifications and Options9.1 SpecificationsTable 35: Environmental SpecificationsEnvironmental SpecificationsStandard TemperatureOperating Te

Figure 15: Physical LayoutMatrix Orbital LK202-24-USB 41

9.2 OptionsTable 38: Options Available on LK202-24-USBInverse Yellow; black backlight with yellow text -IYInverse Blue; blue backlight with white text

Configuration The way a system is set up, or the assortment of com-ponents that make up the system. Configuration canrefer to either hardware or softwar

Scroll To view consecutive lines of data on the display screen.The term scroll means that once the screen is full, eachnew line appears at the bottom

1 IntroductionThe LK202-24-USB is equipped with the following features;• 20 column by 2 line text display• Built in font with provision for up to 8 us

Figure 1: Connections for TestingNOTE The keypad is not used to directly control any aspect of the operation of thedisplay. The display acts simply as

• Run a PC program such as Hyperterm to experiment with typing text. Make certain it’s configured touse the correct port. Set the baud rate to 19,200 a

2 Connections2.1 Connector PinoutRefer to the Figure below for this chapter.Figure 2: Electrical ConnectionsTable 1: Connectors & FunctionsConnect

Table 2: Mating ConnectorsConnector Part # Mate Part #3 Pin White Header AMP 173979 AMP 1739773 Pin Red Header MOLEX 43009 MOLEX 787910 Pin Dual Heade