Matrix-orbital LK204-25 Legacy Manual de usuario

LK204-25User ManualLK204-25 rev 11

complies with 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 NumberD

240064H in out in out66H in out in in960068H in in out out6AH in in out in192006CH in in in out6EH in in in in2.1.4I2C CommunicationsI²C communicatio

Figure 2-10 General Purpose OutputsMaximum allowable current is 20 mA, which is enforced by the current limiting resistor. If the device being switche

10 - 100 uF1N400 1RelaycoilGPO+-Figure 2- 12 Clamping a RelayLK204-25 rev 113

3.Displaying TextThis chapter describes the various text-display commands in detail. A quick reference summary of all text commands is found in sectio

In addition to the built-in characters, users may define up to 8 special characters (which, once defined, occupy positions 0x00 to 0x07 in the above c

3.4.7Turn on underline cursor (254 74)Turns on the underline cursor. The cursor shows the current text insertion point. Both underline and blinking cu

4.Keypad InterfaceThis chapter describes the keypad interface and associated commands in detail.4.1GeneralThe LK204-25 keypad interface processes the

4.3I2C InterfaceThe keypad is read by I²C master read. In short, this means that a read of the module will always return the first unread key press. A

unwanted auto-repeatafter key-up.PollsKey downKey upauto-repeat clockvalid key stroke(before key up)Figure 4- 15 Poll timing4.5.2Auto repeat mode off

Table of Contents1. Introduction...

5.Bar Graphs and Special CharactersThe LK204-25 includes the ability to draw bar graphs (either horizontal or vertical) and allows users to define up

Custom characters occupy a 5 x 8 pixel matrix. Built-in characters are 5 x 7: the bottom row of pixels is normally reserved for the underline cursor.

Before using this command the Initialize Large Digits command must be issued to define the blocks necessary to make up the digits. If regular text and

6.Miscellaneous CommandsThe commands listed in this chapter don't readily fit in any of the other categories, or are used in more than one catego

6.1.7Read module typeThis command does not work on the LK204-25LCD0821 - 0x01 LCD2021 - 0x03 LCD1641 - 0x04LCD2041 - 0x05 LCD4021 - 0x06 LCD4041 - 0x0

7.Appendix: Command Summary7.1GeneralThe operation of the LK204-25 is controlled by a simple and consistent command set. Commands control text displa

0111 7 7 1111 F 15Based on the table, the byte 01001011 can be represented in hex as 4B, which is usually written as any of 4Bh, 4BH, 4B hex or 0x4B.T

Set cursor position FE 47 [col] [row]254 71 [col] [row]254 'G' [col] [row]n/a Moves cursor to the specified column and row. The cursor marks

Command Syntax Default Notes254 85 [time]254 'U' [time]multiplier.7.6Bar Graphs and Special CharactersThe commands in this section are used

7.7Miscellaneous CommandsTable 7-4 Miscellaneous CommandsCommand Syntax Default NotesClear display FE 58254 88254 'X'n/a Clears screen of te

4.5.7 Set debounce time (254 85 [time])...195. Bar Graphs and S

8.Appendix: Specifications and Options8.1SpecificationsEnvironmental SpecificationsStandard Temperature Extended TemperatureOperating Temperature 0°C

Figure 8- 16 Physical Layout8.2OptionsOptions Available on LK204-25Extended Temperature EWide Voltage VWide Voltage with Efficient Switching Power Sup

9.Appendix: GlossaryASCIIAmerican Standard Code for Information Interchange. A 7 bit binary code representing the english alphabet, decimal numbers an

Value PixelThe smallest individually controllable element of a display.Pre-Generated FontsPre-determined fonts which can be downloaded into graphic li

1.IntroductionYour LK204-25 has the following features: 20 column by 4 line text display Built-in font with provision for up to 8 user-defined chara

 A power cable with a 4 pin connector (same connector as used to connect 3.5 inch floppy drive). Do not connect the LK204-25 to an unmodified spare p

FF 0x0C Clears the display and puts the cursor at the top leftBS 0x08 Moves the cursor one position to the left and clears that position.Note: These c

2.Connections2.1Connector PinoutRefer to the diagram below for this chapter.Figure 2-2 Electrical ConnectionsThe LK204-25 has four connectors:Connecto

 Do not apply more than +5Vdc to pin #9 on the DB-9 connector.Connector pinout is as follows:1 2 3 4Figure 2- 3 Power connectorPin 1 +5.0 VDC

2.1.1.2Wide Voltage Range ModulesNote: Do not use this cable unless your display module has the "wide voltage range" option (option V). Use