文件名称:Reading-Matrix-and-Common-Bus-Keypads
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This section focuses on a typical 4x4 matrix keypad, but
you can use the same technique with a matrix keypad of
any dimensions. A matrix keypad can be connected to the
PSoC 1 without using any external components as shown
you can use the same technique with a matrix keypad of
any dimensions. A matrix keypad can be connected to the
PSoC 1 without using any external components as shown
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Reading Matrix and Common Bus Keypads\Reading Matrix and Common Bus Keypads.pdf