A Timer triggering RTC Timestamp periodically ? (is it possible ?)

peplegal · ‎2026-03-13

I'd like to use a general purpose timer to continuously trigger a rtc timestamp (using H533)

Is it possible ?

How to map TRGO signal to Timestamp trigger ?

(No HAL please, LL or direct register setup).

Thanks in advance.

mƎALLEm · ‎2026-03-16

Hello,

It's not possible to directly use a general purpose timer to continuously trigger an RTC timestamp event through internal routing. The RTC timestamp can only be triggered by an event on the timestamp pin, a tamper event, or a switch to VBAT mode. If you require timer-based triggering, you may need to externally connect a timer output to the RTC timestamp pin.

From DS14539:

.

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mƎALLEm · ‎2026-03-16

Hello,

It's not possible to directly use a general purpose timer to continuously trigger an RTC timestamp event through internal routing. The RTC timestamp can only be triggered by an event on the timestamp pin, a tamper event, or a switch to VBAT mode. If you require timer-based triggering, you may need to externally connect a timer output to the RTC timestamp pin.

From DS14539:

.

To give better visibility on the answered topics, please click on "Accept as Solution" on the reply which solved your issue or answered your question.