LK402-25-VPT

LK402-25-VPT Datasheet

LK402-25

Part	Datasheet
LK402-25-VPT	LK402-25-VPT (pdf)

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LK402-25 Including LK402-25-422 and LK402-25-USB Technical Manual Description Added Power Directions for the RS422 Model Added Command Summary Addition Grammatical and Ease of Reading Enhancements Initial Release Initial Concept Style Changes to Text and Layout Author Clark Contents Standard Module 6 Recommended 6 Serial 7 I2C Connections 8 USB Module 9 Recommended 9 USB Connections 10 RS422 Module 11 RS422 Connections 11 12 Hyperterminal 12 13 Application 13 Hardware 14 Standard Model 14 Communication/Power Header 14 Serial DB9 Connector 14 Power Through DB9 Jumper 15 Protocol Select 15 USB Model 16 Mini USB Connector 16 Alternate USB Header 16 Alternate Power Connector 16 RS422 Model 17 RS422 17 Alternate Power Connector 17 Common 18 General Purpose Outputs 18 Dallas One-Wire Connector 18 Keypad 19 20 Power 20 21 Manual Override 21 Commands 22 Communications 22 Text 23 Special Characters 25 General Purpose Output 28 Dallas One-Wire 29 30 Display Functions 32 Data Security 33 Miscellaneous 34 Appendix 35 Command Summary 35 Character 37 Environmental 38 Electrical Tolerances 38 Optical Characteristics 38 Dimensional Drawing 39 Ordering 40 Part Numbering Scheme 40 41 Definitions 43 Contact 43 Introduction Figure 1 LK402-25 Display The LK402-25 is an intelligent alphanumeric liquid crystal display designed to decrease development time by providing an instant solution to any project. In addition to the RS232, TTL and I2C protocols available in the standard model, USB and RS422 communication models allow the LK402-25 to be connected to a wide variety of host controllers. Communication speeds of up to 115.2kbps for serial protocols and 100kbps for I2C ensure lightning fast data display. The simple command structure provided permits easy software control of many settings including backlight brightness, screen contrast, and baud rate. On board memory provides up to thirty-two custom characters which can be saved and recalled for start screens, bar graphs or larger numbers. User input is available through a five by five matrix style keypad, and six general purpose outputs provide simple switchable five volt sources. In addition, a Dallas One-Wire header provides a convenient communication interface for up to thirty-two devices. The versatile LK402-25, with all the features mentioned above, is available in a variety of colour, voltage, and temperature options to suit almost any application. Quick Connect Guide Standard Module Figure 2 Standard Connections Table 1 Standard Headers Header Communication/ Power Keypad Dallas One-Wire Mate SCCPC5V/ BBC CSS1FT/CSS4FT KPP4x4 None Offered Temperature Probe The standard version of the LK402-25 allows for user configuration of three common communication protocols. First, the unit can communicate using serial protocol at either RS232 or TTL voltage levels. Second, it can communicate using the Inter-Integrated Circuit, or I2C protocol. Connections for each protocol can be accessed through the four pin Communication/Power Header as outlined in the Serial Connections and I2C Connections sections below. Recommended Parts The most common cable choice for any standard Matrix Orbital display, the Communication/Power Cable offers a simple connection to the unit with familiar interfaces. DB9 and floppy power headers provide all necessary input to drive your display. Figure 3 Communication/Power Cable SCCPC5V For a more flexible interface to the LK402-25, a Breadboard Cable may be used. This provides a simple four wire connection that is popular among developers for its ease of use in a breadboard environment. Figure 4 Breadboard Cable BBC Serial Connections The serial interface provides a classic connection to the LK402-25. The Communication/Power Cable is most commonly used for this setup as it provides connections for DB9 serial and floppy power cables. To place your board in serial mode, adhere to the steps laid out below. Set the Protocol Select Jumpers. RS232 Connect the three jumpers* in the 232 protocol box with the zero ohm jumper resistors provided or an alternate wire or solder solution. TTL Connect the two jumpers* in the TTL protocol box. Note Jumpers must be removed from all protocol boxes save for the one in use. Make the connections. a. Connect the four pin female header of the Communication/Power Cable to the Communication/Power Header of your LK402-25. b. Insert the male end of your serial cable to the corresponding DB9 header of the cable and the mate the female connector with the desired communication port of your computer. c. Select an unmodified floppy cable from a PC power supply and connect it to the power header of the Communication/Power Cable. Create. uProject or hyperterminal will serve to get you started, and then move on with your own development. Instructions for the former can be found below and a variety of application notes are available for the latter at I2C Connections A more advanced connection to the LK402-25 is provided by the I2C protocol setting. It requires a connection directly to your project. This is best accomplished using a breadboard and the Breadboard Cable. Power must be supplied from your breadboard or another external source. To dive right into your application and use the LK402-25 in I2C mode, get started with the guidelines below. Set the Protocol Select Jumpers. I2C Ensure that the two I2C jumpers in the corresponding protocol box are connected while all others are open. Make the connections. a. Connect the Breadboard Cable to the Communication/Power Header on your LK402-25 and plug the four leads into your breadboard. The red lead will require power, while the black should be connected to ground, and the green and yellow should be connected to your controller clock and data lines respectively. b. Pull up the clock and data lines to five volts using a resistance between one and ten kilohms on your breadboard. Create. This time you're on your own. While there are many examples within the Matrix Orbital AppNote section, too many controllers and languages exist to cover them all. If you get stuck in development, it is possible to switch over to another protocol on the standard board, and fellow developers are always on our forums for additional support. USB Module Figure 5 USB Connections Table 2 Standard Headers Header Mate Mini USB EXTMUSB3FT/ INTMUSB3FT 2 Alternate USB None Offered Ordering Part Numbering Scheme Table 44 Part Numbering Scheme LK -402 -25 -V -422 -E 1 2 34 5 6 Options Table 45 Display Options # Designator Options 1 Product Type LK Liquid Crystal Display with Keypad Input 2 Display Size -402 40 columns by 2 rows 3 Keypad Size -25 key maximum 4 Voltage NP Standard Voltage -V Wide Voltage -VPT Wide Voltage with Efficient Switching Power Supply 5 Protocol NP Standard Model -USB Only Model -422 RS422 Only Model 6 Temperature NP Standard -E Extended Temperature *Note The RS422 model should only be powered from a local source, unless the variant is used. Accessories Power PCS Communication CSS4FT Table 46 Power Accessories Standard Power Cable Table 47 Communication Accessories 4 ft. Serial Cable EXTMUSB3FT Mini-USB Cable INTMUSB3FT Internal Mini-USB Cable SCCPC5V Serial Communication/5V Power Cable Breadboard Cable Peripherals KPP4x4 Table 48 Peripheral Accessories 16 Button Keypad

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LK402-25

Including LK402-25-422 and LK402-25-USB

Technical Manual

Description Added Power Directions for the RS422 Model

Added Command Summary Addition Grammatical and Ease of Reading Enhancements

Initial Release Initial Concept Style Changes to Text and Layout

Author Clark

Contents

Standard Module 6 Recommended 6

Serial 7 I2C Connections 8

USB Module 9 Recommended 9 USB Connections 10

RS422 Module 11 RS422 Connections 11
12 Hyperterminal 12 13 Application 13

Hardware 14 Standard Model 14 Communication/Power Header 14 Serial DB9 Connector 14 Power Through DB9 Jumper 15 Protocol Select 15 USB Model 16 Mini USB Connector 16 Alternate USB Header 16 Alternate Power Connector 16 RS422 Model 17 RS422 17 Alternate Power Connector 17 Common 18
General Purpose Outputs 18 Dallas One-Wire Connector 18 Keypad 19 20 Power 20 21 Manual Override 21 Commands 22 Communications 22 Text 23 Special Characters 25 General Purpose Output 28 Dallas One-Wire 29 30 Display Functions 32 Data Security 33 Miscellaneous 34 Appendix 35 Command Summary 35 Character 37 Environmental 38 Electrical Tolerances 38 Optical Characteristics 38 Dimensional Drawing 39 Ordering 40 Part Numbering Scheme 40 41 Definitions 43 Contact 43

Introduction

Figure 1 LK402-25 Display

The LK402-25 is an intelligent alphanumeric liquid crystal display designed to decrease development time by providing an instant solution to any project. In addition to the RS232, TTL and I2C protocols available in the standard model, USB and RS422 communication models allow the LK402-25 to be connected to a wide variety of host controllers. Communication speeds of up to 115.2kbps for serial protocols and 100kbps for I2C ensure lightning fast data display. The simple command structure provided permits easy software control of many settings including backlight brightness, screen contrast, and baud rate. On board memory provides up to thirty-two custom characters which can be saved and recalled for start screens, bar graphs or larger numbers. User input is available through a five by five matrix style keypad, and six general purpose outputs provide simple switchable five volt sources. In addition, a Dallas One-Wire header provides a convenient communication interface for up to thirty-two devices. The versatile LK402-25, with all the features mentioned above, is available in a variety of colour, voltage, and temperature options to suit almost any application.

Quick Connect Guide

Standard Module

Figure 2 Standard Connections

Table 1 Standard Headers

Header

Communication/ Power

Keypad

Dallas One-Wire

Mate SCCPC5V/

BBC CSS1FT/CSS4FT

KPP4x4 None Offered Temperature

Probe

The standard version of the LK402-25 allows for user configuration of three common communication
protocols. First, the unit can communicate using serial protocol at either RS232 or TTL voltage levels. Second, it can communicate using the Inter-Integrated Circuit, or I2C protocol. Connections for each
protocol can be accessed through the four pin Communication/Power Header as outlined in the Serial Connections and I2C Connections sections below.

Recommended Parts

The most common cable choice for any standard Matrix Orbital display, the Communication/Power Cable offers a simple connection to the unit with familiar interfaces. DB9 and floppy power headers provide all necessary input to drive your display.

Figure 3 Communication/Power Cable SCCPC5V

For a more flexible interface to the LK402-25, a Breadboard Cable may be used. This provides a simple four wire connection that is popular among developers for its ease of use in a breadboard environment.

Figure 4 Breadboard Cable BBC

Serial Connections The serial interface provides a classic connection to the LK402-25. The Communication/Power Cable is most commonly used for this setup as it provides connections for DB9 serial and floppy power cables. To place your board in serial mode, adhere to the steps laid out below. Set the Protocol Select Jumpers.

RS232 Connect the three jumpers* in the 232 protocol box with the zero ohm jumper resistors provided or an alternate wire or solder solution. TTL Connect the two jumpers* in the TTL protocol box.
*Note Jumpers must be removed from all protocol boxes save for the one in use.

Make the connections. a. Connect the four pin female header of the Communication/Power Cable to the Communication/Power Header of your LK402-25. b. Insert the male end of your serial cable to the corresponding DB9 header of the cable and the mate the female connector with the desired communication port of your computer. c. Select an unmodified floppy cable from a PC power supply and connect it to the power header of the Communication/Power Cable.

Create. uProject or hyperterminal will serve to get you started, and then move on with your own development. Instructions for the former can be found below and a variety of application notes are available for the latter at

I2C Connections

A more advanced connection to the LK402-25 is provided by the I2C protocol setting. It requires a connection directly to your project. This is best accomplished using a breadboard and the Breadboard Cable. Power must be supplied from your breadboard or another external source. To dive right into your application and use the LK402-25 in I2C mode, get started with the guidelines below. Set the Protocol Select Jumpers.

I2C Ensure that the two I2C jumpers in the corresponding protocol box are connected while all others are open. Make the connections. a. Connect the Breadboard Cable to the Communication/Power Header on your LK402-25 and plug the four leads into your breadboard. The red lead will require power, while the black should be connected to ground, and the green and yellow should be connected to your controller clock and data lines respectively. b. Pull up the clock and data lines to five volts using a resistance between one and ten kilohms on your breadboard. Create. This time you're on your own. While there are many examples within the Matrix Orbital AppNote section, too many controllers and languages exist to cover them all. If you get stuck in development, it is possible to switch over to another protocol on the standard board, and fellow developers are always on our forums for additional support.

USB Module

Figure 5 USB Connections

Table 2 Standard Headers

Header

Mate

Mini USB

EXTMUSB3FT/ INTMUSB3FT
2 Alternate USB

None Offered
Ordering

Part Numbering Scheme

Table 44 Part Numbering Scheme

LK -402 -25 -V -422 -E 1 2 34 5 6

Options

Table 45 Display Options
# Designator

Options
1 Product Type

LK Liquid Crystal Display with Keypad Input
2 Display Size
-402 40 columns by 2 rows
3 Keypad Size
-25 key maximum
4 Voltage

NP Standard Voltage
-V Wide Voltage
-VPT Wide Voltage with Efficient Switching Power Supply
5 Protocol

NP Standard Model
-USB Only Model
-422 RS422 Only Model*
6 Temperature

NP Standard
-E Extended Temperature
*Note The RS422 model should only be powered from a local source, unless the variant is used.

Accessories

Power PCS

Communication

CSS4FT

Table 46 Power Accessories Standard Power Cable

Table 47 Communication Accessories 4 ft. Serial Cable

EXTMUSB3FT

Mini-USB Cable

INTMUSB3FT

Internal Mini-USB Cable

SCCPC5V

Serial Communication/5V Power Cable

Breadboard Cable

Peripherals KPP4x4

Table 48 Peripheral Accessories 16 Button Keypad

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived LK402-25-VPT Datasheet file may be downloaded here without warranties.

Datasheet ID: LK402-25-VPT 647123