RV-8523 Datasheet, PDF (27/57 Pages) MICORO CRYSTAL SWITZERLAND – Real Time Clock

Micro Crystal
Real Time Clock / Calendar Module
RV-8523
9.3. OSCILLATOR STOP FLAG
The OS flag is set whenever the oscillator is stopped. The flag remains set until cleared by using the interface.
When the oscillator is not running, then the OS flag cannot be cleared. This method can be used to monitor the
oscillator.
The oscillator is considered to be stopped during the time between power-on and stable crystal resonance. This
time may be in a range of 200 ms to 2 s, depending on temperature and supply voltage. At power-on, the OS flag is
always set.
OS flag:
9.4. DATA FLOW ON THE TIME FUNCTION
Data flow and data dependencies starting from 1 Hz clock tick:
27/57