User’s Manual
Scott Edwards Electronics, Inc.
1939 S. Frontage Road, Suite F, Sierra Vista, AZ 85635 USA
ph: 520-459-4802 • fax: 520-459-0623 • www.seetron.com
BPP-420 • v4.0 • 7/99 • pg 1
4x20 Serial LCD Module (BPP-420) v4.0
The BPP-420 is an LCD module with attached serial interface. This combination works like a simple
serial-receive terminal at 2400 or 9600 baud (switch selectable). Common control codes like carriage
returns, linefeeds, tabs, backspace, etc. are supported. The display also implements instructions for
cursor positioning, backlight control, large-character display, and right-aligned printing.
New Features in Rev 4.0. This latest version of BPP-420 has the following new features:
• Ability to redefine custom, block-graphics characters.
• Jumper pads to increase backlight brightness or set backlight always on.
• 64-byte buffer, large alpha (A-Z) characters, right-alignment (introduced in rev 3.0)
The revision is identified by “BPP4/PT” printed in the lower right portion of the serial daughterboard.
Disclaimer of Liability
Scott Edwards Electronics, Inc. is not responsible for any special, incidental, or consequential damages resulting
from any breach of warranty, or under any legal theory, including lost profits, downtime, goodwill, damage to or
replacement of equipment or property, and any costs or recovering, reprogramming, or reproducing of data
associated with the use of the hardware or software described herein.
Warranty
Scott Edwards Electronics, Inc. warrants this product against defects in materials and workmanship for a period
of 90 days. If you discover a defect, we will, at our option, repair, replace, or refund the purchase price. Return
the product with a description of the problem. We will return your product or its replacement via standard shipping.
Expedited shipping is available at the customer’s expense.
• Note: Abusing the module, or attempting to repair or modify it, voids this warranty.
Trademarks and Copyrights
Windows
®
and MS-DOS
®
are registered trademarks of Microsoft Corporation; BASIC Stamp
®
is a registered
trademark of Parallax Inc. All trademarked names referenced herein are the property of their respective holders.
This manual in its entirety is copyright Scott Edwards Electronics, Inc., 1995—1999.
Pinout of the BPP-420...............................................................................................................2
Configuration.............................................................................................................................2
Hookup for Use .........................................................................................................................2
Pizeo Buzzer Bell ......................................................................................................................3
Backlight Option Pads...............................................................................................................3
Basic Operation.........................................................................................................................3
Control Codes and Special Features ........................................................................................3
Old-Mode Operation..................................................................................................................3
Program Examples....................................................................................................................7
Dimensions and Specifications .................................................................................................8
Important Notes on Handling, Installation, and Mounting ............................................... 10
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