Exiting from STOP using RTC Alarm A

[yabool2001]

Hi,

Exiting from STOP mode based on RTC Alarm A works nice with ALRAIE (Alarm A interrupt enabled) and ALRAE (Alarm A enabled). 

Do I understand this mechanism correctly, that I've to have both bits enabled?  Having only ALRAE (Alarm A enabled) isn't enough for exit from STOP mode?

V/r

yabool2001

[STTwo-32 · Accepted solution]

Hello @yabool2001 

To exit from stop mode using RTC, you need to enable both ALRAE to enable Alarm A and ALRAIE to enable Alarm A interrupt. The interruption need to be enabled because the wake-up operation start when an RTC interrupt  occur.

For more details, you Can take a look at the RTC chapter of the reference manual of your MCU.

Best Regards.

STTwo-32 

[yabool2001]

@STTwo-32 thx for confirmation and explanation.

V/r

@yabool2001