Real-time clock (RTC) RM0453
1008/1454 RM0453 Rev 2
32.4 RTC low-power modes
The table below summarizes the RTC pins and functions capability in all modes.
Table 212. Effect of low-power modes on RTC
Mode Description
Sleep
No effect
RTC interrupts cause the device to exit the Sleep mode.
Stop
The RTC remains active when the RTC clock source is LSE or LSI. RTC interrupts
cause the device to exit the Stop mode.
Standby
The RTC remains active when the RTC clock source is LSE or LSI. RTC interrupts
cause the device to exit the Standby mode.
Shutdown
The RTC remains active when the RTC clock source is LSE. RTC interrupts cause the
device to exit the Shutdown mode.
Table 213. RTC pins functionality over modes
Functions
Functional in all low-
power modes except
Standby and Shutdown
modes
Functional in Standby
and Shutdown mode
Functional in V
BAT
mode
RTC_TS Yes Yes Yes
RTC_REFIN Yes No No
RTC_OUT1 Yes Ye s Ye s
RTC_OUT2 Yes No No
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