Advertisement
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
Advertisement
