RTC Fix: Clear OS bit in RTC register after low voltage condition #18
+8
−0
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Code changes:
Problem study:
The oscillator stop bit of the External RTC Register must be cleared manually to make it functional.
When the RTC receives low voltage, it triggers the OS bit to be set.
Scenario:
When the super capacitor voltage is drained, the OS bit is set, indicating that the oscillator has stopped. For all subsequent initializations, this OS bit needs to be manually cleared to ensure the RTC operates correctly.
Datasheet: