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Clarification on Reset Behavior When Exiting SHUTDOWN Mode in STM32G0 Series

Anagha_Sasindran
Associate

Hello,

I am working on a project with the STM32G0 series microcontroller. The MCU goes into the 'SHUTDOWN' state and wakes up when the wakeup timer times out. In the reference manual, it is mentioned that wakeup with BOR (Brown-Out Reset) is not available in SHUTDOWN mode.

Anagha_Sasindran_0-1719839704356.png

The manual also states that a power reset is generated when exiting from SHUTDOWN.

Anagha_Sasindran_1-1719839735742.png

Additionally, it is mentioned that BOR is generated when exiting from SHUTDOWN.

Anagha_Sasindran_2-1719839784164.png

Could you clarify which reset is actually occurring when exiting SHUTDOWN mode?

1 ACCEPTED SOLUTION

Accepted Solutions
Simon.T
ST Employee

Hello @Anagha_Sasindran ,

 

Indeed the BOR is not available in shutdown mode, this is why after exiting shutdown a power-on reset is generated. For the next document revision, the mention of "brown-out reset" when exiting shutdown will be replaced by "power-on reset".

 

Best regards,

 

Simon

View solution in original post

2 REPLIES 2
Simon.T
ST Employee

Hello @Anagha_Sasindran ,

 

Indeed the BOR is not available in shutdown mode, this is why after exiting shutdown a power-on reset is generated. For the next document revision, the mention of "brown-out reset" when exiting shutdown will be replaced by "power-on reset".

 

Best regards,

 

Simon

Anagha_Sasindran
Associate

Thanks Simon for the response.