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| RV-8564 Datasheet, PDF (18/40 Pages) MICORO CRYSTAL SWITZERLAND – I2C-Bus Interface Real Time Clock | |||
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Micro Crystal
Real Time Clock / Calendar Module
RV-8564
9.2. VOLTAGE LOW DETECTOR AND CLOCK MONITOR
The RV-8564 has an on-chip voltage low detector. When VDD drops below VLOW, the VL (Voltage Low) flag is set to
indicate that the integrity of the clock information is no longer guaranteed. The VL flag can only be cleared by using
the interface.
The VL flag is intended to detect the situation when VDD is decreasing slowly; for example under battery operation.
Should the oscillator stop or VDD reach VLOW before power is reasserted, then the VL flag will be set. This indicates
that the time is possibly corrupted.
9.3. SETTING AND READING THE TIME
Data flow and data dependencies starting from 1 Hz clock tick
18/40
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