STM32U083 wakeup from pin reliability

[stefanod]

Hi all,

we are designing a product based on a STM32U083. The device is battery powered (not removable) and it can remain in storage for at least 2 years. To reduce battery drain we are putting the mcu in shutdown mode to then wake him up via a button connected to one of the defined wakeup pin. We already implmeneted/tested this mechanism and it works great but we were asking ourselfs if it is reliable and if it will still work correctly even if the device remain dorment for 2 years.

Can you please provide some confirmation or additional information about our concernings?

Thank you.

Stefano

[TDK]

A wakeup pin will still function regardless of how long it's been since the last wakeup. Just need power to still be there. You'll definitely want to measure the power consumption to ensure the battery has sufficient capacity.