nucleo's stlink not working while mcu sleeps

carleslsregner · ‎2026-01-14

Greetings,

I know how to solve it , but I do want to reseach on this issue. I use a nucleo's stlink (nucleo F070RB) to program a stm32g030k8tx.

However, the target is only detected and, therefore programmed, when the external mcu is not on standby mode.

Could it be becasue I do not use the NRST on the SWD? I just use Software Reset, instead.

Thanks.

Peter BENSCH · ‎2026-01-14

If the target is in sleep mode, it can only be brought out of this state by resetting it. Therefore, NRST must be connected and the debugger must be set to ‘Connect under Reset’.

Regards
/Peter

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