How to use stm32h7 Ethernet PTP Auxiliary snapshots with external events feature?

[mishka]

Hi. I must use PTP and also precisely capture 1PPS input as a backup/alternative sync source.

In the manual DocID029587 Rev 3, page 2705, there is a secion "Auxiliary snapshots with external events" in which ptp_aux_ts_trig_i is mentioned. But I can't find this signal anywere (and ptp_aux_trig_i also).

What pin to use for 1PPS signal and how to configure Auxiliary trigger?

[Imen.D]

Hello @mishka​ ,

PTP and PPS signals are described in the RM0433 reference manual (Rev 5), Table 92. Peripherals interconnect matrix details (page 554 and 569).

We will align the signal names in the coming release of the STM32H7 reference manual, as this makes confused to the user.

With Regards,

Imen.