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Validity of 5-V: 5-V tolerant pin in peripheral function?

Latest Updated:06/20/2013

Question:

Is 5-V tolerant functionality valid even if a 5-V tolerant pin is set to a peripheral function other than I/O port?
For example, when multiplexing a 5-V tolerant pin and an SCI input pin, is it all right to input an external 5 V serial signal?

Answer:

A pin function shared with a 5-V tolerant port also becomes 5 V tolerant. As long as the voltage is within the rated input voltage range of the 5-V tolerant pin, it can be put to other pin functions, such as SCI.
Suitable Products
RX62N, RX621
RX610
RX630
RX63N, RX631
RX210
RX220
RX110
RX111
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