When I do not use the NMI pin, can I connect the pin to Vcc directly? Technical News "TN-M16C-11-9710" states that "The resistor is not necessary when Vcc pin voltage is same or larger than dedicated input pin voltage".
The resistor is not necessary, when the NMI pin voltage satisfies the condition described above. But it is difficult to meet the above condition in the system all the time so you should connect the NMI pin to Vcc via the resistor.
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