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Sample KE-USBMX20 Configuration
The following exercise demonstrates how to program the KE-
USBMX20 to scan a keypad. The keypad used in the example is
a 4 Column by 4 Row matrix (16 key) device.
This example uses the
keypad shown above.
The keypad matrix layout is shown in the figure above. Note
that the Row and Column signals are intermixed on the keypad.
The KE-USBMX20 can be configured to scan the keypad with it
plugged directly into the header with no added wiring.
The back of the keypad has eight pins. This
header plugs directly into the KE-USBMX20
connector. In this example, we align pin 1 of the
keypad header with pin 1 of the KE-USBMX20.
The included keying plug can be placed in to
pin 9 on the KE-USBMX20 to help with proper
header alignment.
9
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