RTC with alarm interrupt that can be set to interrupt on multiples of 5 or minutes divisible by X

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1

Hello,

I was wondering if there is an RTC that has alarm interupts that can be set to interrupt at 5 minutes, 10 minutes

15 minutes, multiples of 5 or some integer?

Or, how to you check your sensor at a regular period and save the most energy?

Thanks.

2

Many RTCs have configurable alarms such that you could set a new alarm time each time one expires, attaining a 5 minute timer. Many microcontrollers also allow a configurable wakeup interrupt based on RTC.

What platform are you trying to integrate this with? Are you looking for a breakout board or just an IC?

I am currently using an STM32F401 with a 32k crystal to clock its internal RTC, which lets me configure a wake-up timer between 1 second and 3 months.