In the Realtime Clock (RTC) chapter of the RX621/62N Group User's Manual: Hardware, there are mentions of "connecting a crystal resonator" and "has a...crystal resonator".
If I want to use the RTC function of the RX62N Series, is it necessary to connect a crystal resonator? Or is it not necessary?
In the RX62N Series user's manual: hardware, "has a...32.768-kHz crystal resonator" means that the device has an oscillation circuit that oscillates on a connected crystal oscillator.
To perform RTC operation, it is necessary to connect a 32.768-kHz crystal resonator between the XCIN and XCOUT pins.