cancel
Showing results for 
Search instead for 
Did you mean: 

Is there an output-on-tamper pulse when the RTC alarm is triggered in Vbat mode?

HAbay.1
Associate III

I want to use an SR latch to detect the alarm pulse on the tamper pin ( STM32F103C8T6), is this possible in Vbat mode? if it is, then what amplitude is this pulse (I am asking because it might be possible that the pulse wasn't high enough for the sr latch to detect it).

12 REPLIES 12

After testing the alarm pulse in vbat mode first thing in the morning ( and under more favorable conditions) I actually did manage to catch the alarm pulse using my sr latch , therefore it was nothing more than a code error( I had a function that inserts the values of the alarm in a backup register so that when the chip wakes up the counter would take that value and that messed up the tests I was doing). Thank you for your help!

Thanks for coming back with the solution.

JW

Thank you for helping out!