STM32WB55 doesn't remain in STANDBY mode

[MTkac.1]

Hello,

I'm trying to put the STM32WB55 into standby mode and eventually wake it up using wakeup pin 1 (PA0), but it wakes up directly after the HAL_PWR_EnterSTANDBYMode() is executed. After that, I checked the PWR->SR1 and it had BLEWUF bit set, but I don't understand why because I have enabled only WAKEUP_PIN1 source. The second core is running full BLE stack and there are no interrupt flags pending at the time when I enter standby mode. I also clear all PWR->SR1 flags before entering standby mode.

Many thanks for help

[skim.5]

I'm having the same problem.

After running the APPE_Init() function, entering Standby Mode takes reset and all reset flags appear as zero

[Graham1]

Did you ever find a solution to this? I am having the same issue when trying to enter shutdown mode.