User Activity

Can I use the Wfe().and create a timer that triggers a event, if so how should it be done?I have a lot of interrupts that are triggered. that disturb my sleep mode.Best regards...PS: I have to sleep every 30 ms and then wake up again
in the user manual: Seconds interrupt, for generating a periodic interrupt signal with a programmable. but it is not as it is with the RTC alarmBest Regards Kadir