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Interfacing to the KE-USB36 Input Header
The KE-USB36 features a 2x20 header for interface to your input
devices. The input header is arranged with grounds on the end
pins of the header, and the 36 inputs between them. The board
is labeled near each header pin, designating the input number
that the pin represents. Each of the pins may be programmed to
emulate any key on a standard PC keyboard as well as the Left,
Middle, and Right mouse buttons.
Inputs on the KE-USB36 header are activated by shorting them
to one of the
provided logic
grounds on the
header. When
Figure 4 - The KE-USB36 Input Header
activated,
the
input will report the keystroke that it has been programmed to
emulate. If held active, the keystroke will repeat (if programmed
to repeat), based on the repeat rates and delays set within the
operating system.
The inputs are intended to handle mechanical switch inputs and
are debounced for that purpose. Logic drivers may be attached
to the inputs as well, provided they are an active low, logic level
signal. Refer to the Appendix A on specifications for the timing of
logic signals. Never attach any external power to the Inputs.
The KE-USB36 input header is a dual row header with .100"
spaced pins. This format is suitable for many readily available
connectors on the market, including a typical IDE hard drive cable.
Since all the inputs require the same logic ground reference, you
may "daisy chain" the ground to all of your switches. We also
offer a breakout board (our part number IOX36) for interface to
the KE-USB36. This interface board attaches to the KE-USB36
header through an IDE cable (provided with the IOX36).
See
the accessories page of this manual for details on the IOX36.
Appendix B demonstrates connection techniques for switches on
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