Industrologic T51-LCD

Front Panel LCD/Switch Board for the T51

Reference Manual

version 1/22/04



Industrologic, Inc.
3201 Highgate Lane
St. Charles, MO
63301
USA

Phone: (636) 723-4000
WWW: http://www.industrologic.com
Email: info@industrologic.com



Trademark and Copyright Information

T51-LCD is a Trademark of Industrologic, Inc. 2000

This document is Copyright (c) 2000 by Industrologic, Inc.
All rights reserved.

No part of this manual may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying or scanning, for any purpose other than the personal use by the purchaser of this product. Industrologic, Inc. reserves the right to revise this document at any time without obligation to notify any person of such revision. Industrologic, Inc. assumes no responsibility for any errors that may appear in this document.


Warning/Disclaimer

Whereas effort has been made to make the information in this document as useful and accurate as possible, Industrologic, Inc. assumes no responsibility for the application, usefulness, or completeness, of the information contained herein. Under no circumstance will Industrologic, Inc. be responsible or liable for any damages or losses including indirect or consequential damages or losses arising from either the use of any information contained within this manual or the use of any products or services referenced within this manual.

Industrologic, Inc. reserves the right to change any product's features, specifications, documentation, warranties, fee schedules, and conditions at any time and without notice.

Industrologic products are provided as printed circuit board level assemblies. Some Industrologic products may include mechanical packaging assessories which are provide for the purchaser's convenience, and are not intended to be final assembly enclosures.

Industrologic products are provided with the understanding that the purchaser will determine fitness for any particular application as well as achieve compliance with any particular specifications or regulations as required or desired for that application.


Warranty

Industrologic, Inc. products are warranted to be free from defects in workmanship or material under normal use and service for a period of one year from date of purchase. Industrologic's warranty is to the original purchaser only, but is extended to you by the Distributor or OEM from whom you purchased the product.

Industrologic's obligation under this Warranty is limited to replacement with a new or repaired unit to the original purchaser. The unit must be returned, and replacements obtained from Industrologic, Inc. or the Distributor or OEM from whom it was purchased.

This warranty will not apply if, in the judgment of Industrologic, Inc., damage or failure of the product has resulted from accident, alteration, misuse, abuse, connection to or operation with incompatible signals or power sources, or improper installation.

Under no circumstances shall Industrologic, Inc. be liable to purchaser or any third party for any loss of profits or other direct or indirect costs, expenses, losses, or consequential damages arising out of or as a result of any defects in or failure of Industrologic products or any part or parts thereof.

THIS WARRANTY IS IN LIEU OF ANY OTHER WARRANTY, EITHER EXPRESSED OR IMPLIED, AS TO DESCRIPTION, QUALITY, MERCHANTABILITY, FITNESS FOR ANY PARTICULAR PURPOSE OR USE, OR ANY OTHER MATTER.


Return and Repair Policy

Products purchased in single piece quantities may be returned, if in resellable condition, for a full refund of the purchase price only, to the original purchaser, within 30 days of purchase.

Products must be returned by original purchaser with a Return Materials Authorization (RMA) number issued by Industrologic, Inc. or the Distributor or OEM from whom it was purchased, authorizing its return. Current repair or replacement fees and procedures will be related during the issue of the RMA number.

Warranty or repair units must be returned with postage and insurance paid by purchaser. Industrologic, Inc. is not responsible for damages or loss during shipment.




Industrologic T51-LCD

Front Panel LCD/Switch Board for the T51

The T51-LCD is a front panel LCD and switch interface module for the Industrologic T51 Single Board Computer. It has been designed to mate with the T51 IO connector and mounting holes, and includes a one line by 16 character LCD display and 3 pushbutton switches.



picture of T51-LCD


Summary of Features



Mechanical Specifications

Double-sided .062" FR-4 glass epoxy printed circuit board.
P.C. Board assembly has holes available for mounting to T51, enclosure, or #6 standoffs.
P.C. Board dimensions: 2.00 inches by 4.25 inches


P.C. Board Dimensions:

mechanical drawing of T51-LCD


Mounting the T51-RSL

The T51-LCD is connected to a T51 by plugging together the 12 pin IO connectors on each board and using 1 inch spacers between them. Included with the T51-LCD is a set of 6-32 threaded spacers and screws that allow this to be easily done, and to mount both boards to a panel or enclosure.

The 1 inch spacers can be installed in either direction so that the screw thread is sticking out of either the T51 or the T51-LCD. This allows the two boards to be connected together and to be mounted facing either toward or away from the mounting surface. The only other hardware that is needed is four more 6-32 screws with heads matching your panel and application.


Electrical Specifications

Operating environment:
Temperature: 0-50 degrees Celsius (32-122 Fahrenheit)
Humidity: 30 to 80 percent, non-condensing

LCD current: 5 ma at 5 volts

Using the T51-RSL

Switches S1, S2, and S3 on the T51-LCD are connected to P1.2, P1.1, and P1.0 on the IO connector respectively, and can be read like any switch connected to a T51 IO pin. Refer to the T51 Reference Manual for information about this application.

Trimmer potentiometer R1 is used to adjust the "contrast" of the LCD, and can be adjusted as desired for the best appearing display.

Alternate or additional LCD display units can be connected to the 16 extra pads on the T51-LCD printed circuit board, since these 16 connections are common to many LCD units. Refer to the T51-LCD schematic diagram and that particular LCD's technical manual to confirm these connections. (If multiple LCD units are connected the contrast adjustment will need to be changed.)

Space is provided on the circuit board for resistors R2 and R3, which allow for different configurations that set the current of the "backlighting" LED's present in alternative LCD display units. If such an LCD unit is substituted you will need to refer to the LCD's technical manual for information on how to use this circuit.

The optional Enhanced Tiny Machine Basic for the T51 includes special instructions to easily drive the T51-LCD, and is highly recommended.

The standard T51 Tiny Machine Basic can be used to drive the T51-LCD, however this will require an intimate knowledge of the display driver chips that reside on most LCD displays. Refer to the Hitachi HD44780 LCD display driver technical manual for programming information. The connections from the LCD display to the IO connector provide for a 4 bit data word, and the ability to write data to the LCD but not to read it.


Display Specific Programming Information

The standard LCD module provide with the T51-LCD is a one line by sixteen character display based on the Hitachi HD44780 LCD display driver chip. Since this chip was designed to drive LCD modules with up to four lines of 64 characters, its method of identifying cursor positions in its display RAM is often confusing when it is used with displays that have fewer lines or characters per line. The cursor positions are not contiguous on smaller displays. The following lists the column positions of the line and their corresponding cursor position number. 

column    1  2  3  4  5  6  7  8  9 10 11 12 13 14 15 16
cursor   00 01 02 03 04 05 06 07 64 65 66 67 68 69 70 71


Schematic Diagram

schematic diagram of T51-LCD


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