In order to do safety testing on a PCB, i have to bypass the multiplexer on the board by configuring the input from a I/O expander. Standard operation has high impedance input to the expander giving 3 HIGH Inputs to the multiplexer, 2 of which are address lines and the other is the enable line. My question is, in order to bypass the multiplexer is all i have to do is set the enable input LOW therefore negating the other two lines?
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