When using the RX62N, RX621, RX62T, or RX62G, it is not necessary to enable the input buffer control bit of the Input Buffer Control Register (ICR) for a POE terminal input setting. This, however, above does not apply to the RX610.
Also, the following peripheral modules do not require ICR settings.
(1)RX62N, RX621 - port register read, data bus input, NMI, and POE pin inputs.
(2)RX62T, RX62G - port register read, NMI, and POE pin inputs.
For the input buffer control, see “Input Buffer Control Register (ICR)” and "Settings of Ports" description on the “I/O ports” section of their respective user’s manual.