Hagstrom KE18 User Manual

KE18
PC Keyboard Encoder
User Manual

Thank you for purchasing the

HAGSTROM ELECTRONICS, INC.

KE18. This product is confi gurable in

a variety of ways to meet your specifi c

requirements. Please take a few minutes to

read this manual before using your KE18.

Table of Contents

Introduction to the KE18 1

Confi guring the KE18 Jumpers 2

Interfacing to the KE18 I/O Header 4

Connection to Computer and Keyboard 5

KE18 Keycode Lookup Tables 6

Accessories 7

HAGSTROM ELECTRONICS, INC. warrants this
product against defects in material or workmanship for a
period of ONE YEAR from the original purchase date. We will
repair or replace (at our option) the returned defective unit
at no charge during this warranty period.

No responsibility is assumed for any special, incidental,
or consequential damage resulting from the use of or
inability to use this product. In no case is HAGSTROM
ELECTRONICS, INC. to be liable for any amount which
exceeds the purchase price of the unit, regardless of the
claim.

No other warranty, written or verbal, is authorized. This
warranty is applicable only to units sold in the United States.
Units sold outside the United States are covered by a similar
warranty.

Depending on the state in which you live, you may have additional rights.

Great care has been taken during the assembly, testing, and burn-in
of your KE18 to ensure its performance. If you have any questions,
please send us an email or give us a call. Support is available Monday
through Friday, 8:00 am to 5:00 pm (EST).

customer service email: [e-mail]

Call Toll Free 888-690-9080, or [phone]

NOTICE The KE18 product is designed to be used by technically

oriented computer users. When the KE18 is in use, your computer’s
signals and voltages are present on the unit. Prudent handling and
packaging is necessary to prevent damage to your computer.

Your keyboard encoder is designed for OEM use, and is not FCC part 15 approved. Because
the packaging and use of the product will directly affect the characteristics of the unit, it is the
responsibility of the purchaser to obtain fi nal approval of their application, if required.

PS/2, XT, and AT are Trademarks of International Business Machines.

Introduction to the KE18

The KE18 PC Keyboard Encoder is a tool for interfacing switches
or keypads to your computer’s keyboard input. It provides all of the
necessary keyboard communication to your computer, and can
therefore take the place of the keyboard. The KE18 also features
a pass through port for the user’s PC keyboard, allowing both the
KE18 and the keyboard to be used together. This feature facilitates
development and testing of KE18 applications.

Power for the KE18 is obtained from the computer’s keyboard
connector. No external power supply is required.

The unit may be confi gured for use with compatible Pentium, PS/2,
X86, and PC XT computers.

The 18 pins labeled “A”-“R” on the I/O header provide a means for
converting switch closures to keystrokes sent directly to the computer.
These I/O pins are jumper confi gurable for operation as 18 individual
inputs, or as a 9x9 matrix. As a switch closure is detected, a code is
sent to your computer which corresponds to the input detected (see
keycode lookup tables on page 6).

The 40 pin dual row header serves as the connection point to each of
the I/O pins on the KE18. This header accepts a variety of connectors,
including the plug on many off the shelf keypads. This header also
provides a convenient place for attachment of individual switches.

40 pin dual row

I/O Header

1

Confi guring the KE18 Jumpers

The KE18 is designed to be easy to use. There are 3 jumpers located on
the board which allow for selection of various modes. These jumpers
must be set before using the product.

Jumper 1

This jumper selects the repeat function of the inputs on the KE18’s
I/O header.

With this jumper in place, inputs will send a single keystroke to the PC
when activated regardless of the length of time they are held on.

When this jumper is open, inputs on the KE18’s I/O header will repeat
their defi ned keystroke for the duration the input is held active or until
another input is activated.

Jumper 2

This jumper controls the scanning mode for the I/O header on the
KE18.

If this jumper is in place, the KE18 will scan the I/O header as 18
individual inputs (pins “A” through “R”). Keystrokes to the PC are
activated in the 18 input mode by making a connection between an
input pin and one of the logic ground pins (“Gnd”), provided at each
end of the I/O header.

With this jumper open, the KE18 scans the I/O header as a 9 Column
by 9 Row matrix. In this mode, keystrokes to the PC are generated by
connecting a switch such that one Row pin (“J” through “R”) and one
Column pin (“A” through “I”) are shorted together when the switch is
activated.

NOTE: See the Keycode Lookup Tables on page 6 for keystrokes

available in each of these modes.

2

KE-MM6

5 pin DIN Male/Male 6 foot cable. Connects
KE18 with 5 pin DIN connectors to computer.

KE-MM6-mini

6 pin miniDIN Male/Male 6 foot cable. Connects
KE18 with 6 pin miniDIN connectors to computer.