Hi,
The manual of TCA8418E states that "If unused, connect to VCC through a pullup resistor".
However, Figure 20. of TCA8418E-EVM Schematic shows unused is floating.
First, Which is correct?
Second, why I don't connect it to ground instead of pull-up resistor, it reduces the cost and the space?
Third, if I must connect them to Vcc through pull-up resistors, can I connect all unused to One common resistor?
Fourth, does the switches matrix need pull-up resistors?
Best regards