In SX Microcontrollers, SX/B Compiler and SX-Key Tool, George Herzog wrote:

Thanks Zoot.  That's the common sense approach.

To the best of my knowledge, the RTCC pin does not document whether it has internal weak pullups or not. And there is NO OUTPUT mode. Configuration is via the Option command, not the i/o port configuration registers.

In this schematic, it is pulled high. But there is no pullup resistor included. I suppose I should insert a 10K resistor for safety's sake and to limit current consumption.  Due to being unused, pulling to ground or to +5 seems arbitrary.

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