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Are the unused ports on hardware acceptable either input or output?

Latest Updated:05/27/2013

Question:

In the Treatment of Unused Pins section of the user's manual: hardware, it states that "These pins can be left while PORTn.ICR is in the initial state (the input buffer disabled)*". Is it correct to understand that unused ports on hardware (in an unconnected, open state) are also acceptable? When using the above, is either input or output acceptable?

Answer:

Yes, provided that the ports in question are not read. The pins may be in either input or output state. Note that pin handling is necessary if you wish to read a port.

 

Suitable Products
RX62N, RX621
RX62T
RX610
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