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Where is Oscillator Stop (OS) status bit in PCF85263A RTC registers?

Question asked by Bob Schilken on Nov 26, 2016
Latest reply on Nov 29, 2016 by Bob Schilken

Where is the Oscillator Stop (OS) status bit in PCF85263A RealTimeClock?  The Data Sheet talks at length about the bit, but I cannot find it in the control registers.  Access to bit is critical to insure the oscillator has not been interrupted  - even for a moment.  My design uses super capacitor for backup (and internal switch), but backup voltage can go too low for oscillator to keep functioning.  Attached are two relevant pages of data sheet.

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